- Table View
- List View
Root and Tuber Crops
by J. E. BradshawIt is important to include Tuber and Root Crops in the Handbook of Plant Breeding. They include starchy staple crops that are of increasing importance for global food security and relief of poverty, important millennium goals for the United Nations. Indeed, 2008 was the UN International Year of the Potato in recognition of this role of the potato as the world's third most important food crop after wheat and rice. The other major staples are cassava, sweetpotato and yam. Together they occupy about 50 million hectares, with production at 640 million metric tons, of which 70% is in developing countries. In total there are more than 30 species of Root and Tuber Crops grown in the world today. Given the content of other volumes in the series, it makes sense to include sugar and fodder beets; swedes and turnips; and minor root and tuber crops so that the book series is as complete as possible. Like the other volumes in the series, this one will present information on the latest in applied plant breeding using the current advances in the field, from an efficient use of genetic resources to the impact of biotechnology in plant breeding. Seven crop specific chapters are proposed, together with an introduction to this diverse set of plant species. Outstanding scientists for each crop species are proposed as senior authors, who may invite co-authors to contribute part of a chapter. In order to increase the overall acceptance of the volume, balance will be sought with authors from different research groups/countries who will be asked to contribute and collaborate where appropriate. The book should be of interest to researchers in both academic and industrial settings, and in both developed and developing countries, as well as students and teachers of plant breeding. It is currently extremely important to educate and train a new generation of plant breeders given the challenges faced by humankind in producing more food for an expanding global population during a period of environmental (including climate) change.
Root to Stem: A seasonal guide to natural recipes and remedies for everyday life
by Alex Laird'Root to Stem is a seasonal and holistic approach to health that puts plants, herbs and nature at the heart of how we live and eat. It is a new kind of guide that links individual health to our communities and the planet's health to sustain us all.'This perfect companion to the seasons, this book will show you how to take greater control over your own health and well-being, treat everyday ailments, and ensure the sustainability of the planet through discovering how to forage, grow, or shop for plant- and herb-based foods and products. Including: Detox in the spring with sorrel, cleavers and nettles. Harvest summer lime leaf shoots to soothe digestive upsets and feed gut microbes. Bake a Lammas loaf to celebrate the autumnal equinox. Boost your winter immunity with red berries, purple potatoes and rosehips. Root-to-stem eating encourages you to use every edible part of plant, including the leaves, skin, seeds and stalks.Travelling through the four seasons, expert medical herbalist Alex Laird shares the natural ingredients that are available on your doorstep, simple delicious recipes and easy-to-make herbal remedies.
Root, Tuber and Banana Food System Innovations: Value Creation for Inclusive Outcomes
by Graham Thiele Hugo Campos Michael Friedmann Vivian Polar Jeffery W. BentleyThis open access book describes recent innovations in food systems based on root, tuber and banana crops in developing countries. These innovations respond to many of the challenges facing these vital crops, linked to their vegetative seed and bulky and perishable produce. The innovations create value, food, jobs and new sources of income while improving the wellbeing and quality of life of their users. Women are often key players in the production, processing and marketing of roots, tubers and bananas, so successful innovation needs to consider gender. These crops and their value chains have long been neglected by research and development, hence this book contributes to filling in the gap. The book features many outcomes of the CGIAR Research Program in Roots, Tubers and Banana (RTB), which operated from 2012-21, encompassing many tropical countries, academic and industry partners, multiple crops, and major initiatives. It describes the successful innovation model developed by RTB that brings together diverse partners and organizations, to create value for the end users and to generate positive economic and social outcomes. RTB has accelerated the scaling of innovations to reach many end users cost effectively. Though most of the book’s examples and insights are from Africa, they can be applied worldwide. The book will be useful for decision makers designing policies to scale up agricultural solutions, for researchers and extension specialists seeking practical ideas, and for scholars of innovation.
Root-Derived Bicarbonate Assimilation in Plants
by Yanyou Wu Sen RaoThis book summarizes the physiological effects of bicarbonate in plants and systematically introduces readers to a bidirectional isotope labeling tracer technique used to quantify the contribution of root-derived bicarbonate to total photosynthetic inorganic carbon assimilation in plants. This method helps to shed light on the role of dissolved inorganic carbon from the soil in overall photosynthesis, an aspect that has been underestimated or neglected entirely in the past. The book quantifies the capacity for root-derived bicarbonate assimilation in certain plant species and illustrates the coupling relationship between karstification and photosynthesis. Further, it demonstrates that root-derived bicarbonate utilization is as important as stomatal-derived inorganic carbon assimilation in biological evolution and plant adaptation to the environment. Using numerous models, it also illustrates carbon isotopic mixtures in complex inorganic carbon utilization and supplements the results with numerical calculations presented as tables and figures. In short, the book offers a strikingly new perspective on photosynthesis.
Root-Galling Disease of Vegetable Plants
by Faheem Ahmad Gloria NombelaThis book provides the most comprehensive and up-to-date review of research on vegetable plants associated with root-galls disease caused by root-knot nematodes (RKNs), Meloidogyne spp. Vegetables retain a key position in cultural cuisines and their consumption worldwide due to rich sources of micronutrients, including vitamins, minerals and antioxidants, but root galls disease of these crops caused by RKNs steals both quantity and quality from production. The field of plant nematology has experienced exponential growth over the past decade, and these RKNs are now known as widely damaging obligate plant parasites of vegetable plants. Advances are being made in understanding their biology, parasitism in the root system, giant cell development, root gall formation, chemical signalling, root-knot disease complexes, and management systems. This compilation provides an invaluable resource for studying root-galls disease of vegetable plants to those readers associated with plant nematology, plant pathology, plant protection, and agricultural science, including researchers, teachers, advanced undergraduates and graduate students, and even agricultural extension agents and farmers.
Root-Knot Nematodes
by Roland Perry Maurice Moens James L. StarrRoot-knot nematodes are the most economically important group of plant-parasitic nematodes worldwide, and their control presents a major global challenge. Advances are being made in understanding their biology, host-parasite interaction and management strategies, and this comprehensive guide with many color photos and contributions from international experts covers the taxonomy, classification, morphology, life-cycle biology, genomes, resistance, sampling, detection, and management strategies of these pests, providing an essential reference for researchers, students and lecturers in plant nematology, plant pathology, agriculture, and agronomy.
Rooted: Life at the Crossroads of Science, Nature, and Spirit
by Lyanda Lynn HauptDeepen your connection to the natural world with this inspiring meditation, "a path to the place where science and spirit meet" (Robin Wall Kimmerer).In Rooted, cutting-edge science supports a truth that poets, artists, mystics, and earth-based cultures across the world have proclaimed over millennia: life on this planet is radically interconnected. Our bodies, thoughts, minds, and spirits are affected by the whole of nature, and they affect this whole in return. In this time of crisis, how can we best live upon our imperiled, beloved earth?Award-winning writer Lyanda Lynn Haupt&’s highly personal new book is a brilliant invitation to live with the earth in both simple and profound ways—from walking barefoot in the woods and reimagining our relationship with animals and trees, to examining the very language we use to describe and think about nature. She invokes rootedness as a way of being in concert with the wilderness—and wildness—that sustains humans and all of life.In the tradition of Rachel Carson, Elizabeth Kolbert, and Mary Oliver, Haupt writes with urgency and grace, reminding us that at the crossroads of science, nature, and spirit we find true hope. Each chapter provides tools for bringing our unique gifts to the fore and transforming our sense of belonging within the magic and wonder of the natural world.
Rooting for Plants: The Unstoppable Charles S. Parker, Black Botanist and Collector
by Janice N. HarringtonMeet Charles S. Parker, an unsung yet trailblazing Black scientist who made major contributions to the fields of botany (the study of plants) and mycology (the study of fungi) in this inspiring STEM/STEAM picture book biography.In 1882, Black botanist and mycologist Charles S. Parker sprouted up in the lush, green Pacific Northwest. From the beginning, Charles&’s passion was plants, and he trudged through forests, climbed mountains, and waded into lakes to find them. When he was drafted to fight in World War I, Charles experienced prejudice against Black soldiers and witnessed the massive ecological devastation that war caused. Those experiences made him even more determined to follow his dreams, whatever the difficulties, and to have a career making things grow, not destroying them.As a botanist and teacher, Charles traveled the United States, searching for new species of plants and fungi. After discovering the source of the disease killing peach and apricot trees, Charles was offered a job at Howard University, the famed historically Black college where he taught the next generation of Black scientists—men and women—to love plants and fungi as much as he did.
Roots, Tubers, and Bulb Crop Wastes: Management by Biorefinery Approaches
by Ramesh C. RayThis edited book brings forth comprehensive information on the bioprocessing and biovalorization of root (i.e., cassava, sweet potato, yams, and aroids), tuber (i.e., potato, carrot, turnip, artichoke and beet root), and bulb (i.e., onion and garlic) crop wastes into various products and platform chemicals in a biorefinery approach. The non-edible portion of roots, tubers, and bulb crops, after processing (waste), such as peels, skins, pulps, rejects, and unmarketable tubers, account for about 20–40% of the total weight of the fresh produce. Tropical tuber crops such as cassava, yams, aroids, and sweet potato generate bagasse, the byproduct of the starch processing industry, which contains about 30–50% starch and fibrous materials on a dry weight basis. Similarly, the husk is the leading waste from onion and garlic processing. The amount of waste and byproducts of potato industry is estimated to be around 12–20% of their total production. These wastes pose increasing disposal and potentially severe pollution problems and represent a loss of valuable biomass and nutrients. Roots, tubers, and bulb wastes usually have a composition of sugar, starch, proteins, phenolic phytochemicals, fibers, and minerals. Therefore, they should not be considered as “wastes” but raw materials for other industrial processes in the biorefinery approach. These wastes provide conditions amenable for the growth of microorganisms and opens up great opportunities for their reuse in fermentation processes to develop value-added bioproducts such as enzymes, single-cell proteins, bio-absorbents, phenolic bioactive compounds, aroma and flavor compounds, organic acids, and biofuels. This book fills the gap in literature about the processes and by-products. The book is composed of 16- chapters deep diving into valorization and bioprocessing of a range of tuber crop waste. The book explores these processes in 11 different crops and highlights the life cycle assessment as well as highlightsthe opportunities about commercialization of technologies used in bioprocessing and bio-valorization of root crop waste. The processes explained in the book are rooted in the principles of circular economy. This book is of interest to teachers, researchers, environmentalists, bio-based industrialist, and policymakers.
Rosa Pionera y las remachadoras rechinantes (Los Preguntones / The Questioneers Ser. #1)
by BEATY, ANDREA / ROBERTS,DAVID«¡Bestseller del New York Times! Continúan las aventuras de los Preguntones: Rosa Pionera, Ada Magnífica y Pedro Perfecto, ahora en una nueva serie de libros de capítulos cortos. La primera entrega, Rosa Pionera y las Remachadoras Rechinantes, es una historia enérgica sobre el poder del trabajo en equipo y el verdadero significado del hogar. Rosa Pionera conoce de fracasos, fallas, catástrofes y contratiempos. Después de todo, ¡la ingeniería tiene mucho que ver con la perseverancia! Pero esta vez, Rosa tiene un proyecto muy importante; uno que parece superior a sus posibilidades. Su querida tía-bisabuela Rosie y sus amigas, las Remachadoras Rechinantes, un grupo de divertidas mujeres que construyeron aviones durante la Segunda Guerra Mundial, necesitan ayuda para inventar algo nuevo. ¡Y Rosa es la ingeniera perfecta para la tarea! Después de un fracaso# luego otro# y otro más# Rosa comienza a perder la esperanza. Pero gracias a la ayuda de sus amigos Pedro Perfecto y Ada Magnífica, Rosa completa con éxito la misión. Y, junto con las Remachadoras, redescubre el significado del hogar.
Rosalind Franklin: The Dark Lady of DNA
by Brenda MaddoxIn 1962, Maurice Wilkins, Francis Crick, and James Watson received the Nobel Prize, but it was Rosalind Franklin's data and photographs of DNA that led to their discovery.Brenda Maddox tells a powerful story of a remarkably single-minded, forthright, and tempestuous young woman who, at the age of fifteen, decided she was going to be a scientist, but who was airbrushed out of the greatest scientific discovery of the twentieth century.
Rosetta: The Remarkable Story of Europe's Comet Explorer (Springer Praxis Books)
by Peter BondIn 2014, Rosetta became the first mission to orbit a comet and to deploy a lander onto its surface. This is the story of ESA’s pioneering comet explorer, following the mission from its initial inception to its historic touchdown. Read along as the Rosetta orbiter and its lander, Philae, evolve over the years, overcoming early mission hurdles before embarking on their one-way, decade-long voyage to a comet. See how the saga then culminates with Rosetta and Philae at last unveiling their icy target and achieving an unprecedented touchdown on its surface.Award-winning space writer Peter Bond takes us behind the scenes of this historic endeavor, sharing insights from the international team of scientists and engineers who made the mission possible, describing the remarkable technology that they created, and delving into the treasure trove of scientific discoveries that followed.Recounting in vivid detail the inner workings of Rosetta, this book is a celebration of the mission that has left a lasting impact on planetary science and space exploration.
Rosie Revere And The Raucous Riveters
by David Roberts Andrea Beaty<P><P>Rosie Revere is no stranger to flops and fails, kerfuffles and catastrophes. After all, engineering is all about perseverance! But this time, Rosie has a really important project to tackle--one that feels much bigger than herself. <P><P> Rosie's beloved Aunt Rose and her friends, the Raucous Riveters--a group of fun-loving gals who built airplanes during World War II--need help inventing something new. And Rosie is just the engineer for the job! <P><P> After one flop . . . then another . . . and another . . . Rosie starts to lose hope. But thanks to some help from her fellow Questioneers Iggy Peck and Ada Twist, Rosie gets the job done. And, along with the Riveters, she rediscovers the meaning of home. <P><P> Collect them all! Add these other STEM favorites from #1 New York Times bestselling team Andrea Beaty and David Roberts to your family library today! <P><P> Rosie Revere, Engineer Ada Twist, Scientist Iggy Peck, Architect Ada Twist and the Perilous Pants Ada Twist's Big Project Book for Stellar Scientists Iggy Peck's Big Project Book for Amazing Architects Rosie Revere's Big Project Book for Bold Engineers
Rosie Revere and the Raucous Riveters: The Questioneers Book #1 (The Questioneers)
by Andrea BeatyFrom the #1 New York Times bestselling team Andrea Beaty and David Roberts—who created Ada Twist, Scientist and Iggy Peck, Architect—comes Rosie Revere and the Raucous Riveters, a spirited story full of adventure, friendship, and science—and first in the Questioneers chapter book series. Watch Rosie Revere in the Netflix television series Ada Twist, Scientist! “Plenty of affection, creativity, and raucous older ladies to make readers smile.” ―Kirkus Reviews “[A] positive portrayal of diverse kids engaging in various arts and sciences.” ―Booklist Rosie Revere is no stranger to flops and fails, kerfuffles and catastrophes. After all, engineering is all about perseverance! But this time, Rosie has a really important project to tackle—one that feels much bigger than herself. Rosie’s beloved Aunt Rose and her friends, the Raucous Riveters—a group of fun-loving gals who built airplanes during World War II—need help inventing something new. And Rosie is just the engineer for the job! After one flop . . . then another . . . and another . . . Rosie starts to lose hope. But thanks to some help from her fellow Questioneers Iggy Peck and Ada Twist, Rosie gets the job done. And, along with the Riveters, Rosie rediscovers the meaning of home. Rosie Revere and the Raucous Riveters is the first in a unique and exciting series of chapter books for children, parents, and teachers who want to make STEM (science, technology, engineering, and math) fun. Check out all the books in the Questioneers Series: The Questioneers Picture Book Series: Iggy Peck, Architect | Rosie Revere, Engineer | Ada Twist, Scientist | Sofia Valdez, Future Prez | Aaron Slater, Illustrator | Lila Greer, Teacher of the YearThe Questioneers Chapter Book Series: Rosie Revere and the Raucous Riveters | Ada Twist and the Perilous Pants | Iggy Peck and the Mysterious Mansion | Sofia Valdez and the Vanishing Vote | Ada Twist and the Disappearing Dogs | Aaron Slater and the Sneaky SnakeQuestioneers: The Why Files Series: Exploring Flight! | All About Plants! | The Science of Baking | Bug Bonanza! | Rockin’ Robots!Questioneers: Ada Twist, Scientist Series: Ghost Busted | Show Me the Bunny | Ada Twist, Scientist: Brainstorm Book | 5-Minute Ada Twist, Scientist StoriesThe Questioneers Big Project Book Series: Iggy Peck’s Big Project Book for Amazing Architects | Rosie Revere’s Big Project Book for Bold Engineers | Ada Twist’s Big Project Book for Stellar Scientists | Sofia Valdez’s Big Project Book for Awesome Activists | Aaron Slater’s Big Project Book for Astonishing Artists
Rosie Revere's Big Project Book for Bold Engineers: 40+ Things to Invent, Draw, and Make (The Questioneers)
by Andrea BeatyWith more than 40 things to invent, draw, and make, featuring art from the beloved New York Times bestselling picture book Rosie Revere, Engineer, this activity book contains kid-friendly projects of all kinds and is the perfect gift for curious young readers! Soon enough children will be engineering whizzes just like Rosie, and along the way she’ll reassure them that failure, flops, mess-ups and cross-outs are part of the process. Do you like to make things? Dream up gadgets to improve your life and the lives of others? Then you are ready to join Rosie Revere and become a great engineer! Build a Solar Oven Make a Simple Catapult Design a Better Bicycle Collect “Engineer’s Treasure” And much more! Engineering is persevering, and this book is the perfect place for trying out, crossing out, and trying again. There is no better way to introduce would-be engineers to science and engineering than with their new best friend, Rosie. It’s fun for them and a great way for parents who want to get their kids excited about STEM (science, technology, engineering, math) in school. And now you can follow Rosie’s further adventures—with her friends Iggy Peck and Ada Twist—in the instant New York Times bestseller Rosie Revere and the Raucous Riveters, a chapter book starring The Questioneers! Don’t miss these STEM favorites! Rosie Revere, Engineer Iggy Peck, Architect Ada Twist, Scientist Iggy Peck’s Big Project Book for Amazing Architects Rosie Revere and the Raucous Riveters Ada Twist and the Perilous Pants Ada Twist’s Big Project Book for Stellar Scientists
Rosie Revere, Engineer
by David Roberts Andrea BeatyRosie Revere dreamed of becoming a great engineer. Where some people see rubbish, Rosie sees inspiration. Alone in her room at night, shy Rosie constructs great inventions from odds and ends. Hot dog dispensers, helium pants, python-repelling cheese hats: Rosie’s gizmos would astound—if she ever let anyone see them. <p><p> Afraid of failure, she hides them away under her bed. Until a fateful visit from her great-great-aunt Rose (AKA Rosie the Riveter!), who shows her that the first flop isn’t something to fear—it’s something to celebrate. And you can only truly fail, if you quit.
Rotary Drum: Fluid Dynamics, Dimensioning Criteria, and Industrial Applications (Advances in Drying Science and Technology)
by Marcos Antonio Barrozo Dyrney Araújo Dos Santos Cláudio Roberto Duarte Suellen Mendonça NascimentoRotary Drum: Fluid Dynamics, Dimensioning Criteria, and Industrial Applications provides in-depth analysis of fluid dynamics in rotary drums. In addition, it provides analysis on the different configurations, including nonconventional ones, diverse industrial applications, and comparison with competing dryer types, as well as the modeling of these devices. Covering important aspects of fluid dynamics in rotary drums, which directly influence the drying performance, the book also considers the significant cost of conventional rotary dryers. It takes into account the scale-up of rotary dryers and the control of product quality during processing, which can leave the final product overdried and overheated, wasting thermal energy. The book serves as a useful reference for researchers, graduate students, and engineers in the field of drying technology.
Rotating Machinery, Optical Methods & Scanning LDV Methods, Volume 6: Proceedings of the 38th IMAC, A Conference and Exposition on Structural Dynamics 2020 (Conference Proceedings of the Society for Experimental Mechanics Series)
by Dario Di Maio Javad BaqersadRotating Machinery, Optical Methods & Scanning LDV Methods, Volume 6: Proceedings of the 38th IMAC, A Conference and Exposition on Structural Dynamics, 2020, the sixth volume of eight from the Conference brings together contributions to this important area of research and engineering. The collection presents early findings and case studies on fundamental and applied aspects of Structural Health Monitoring, including papers on:Novel TechniquesOptical Methods,Scanning LDV MethodsPhotogrammetry & DICRotating Machinery
Rotating Machinery, Optical Methods & Scanning LDV Methods, Volume 6: Proceedings of the 39th IMAC, A Conference and Exposition on Structural Dynamics 2021 (Conference Proceedings of the Society for Experimental Mechanics Series)
by Dario Di Maio Javad BaqersadRotating Machinery, Optical Methods & Scanning LDV Methods, Volume 6: Proceedings of the 39th IMAC, A Conference and Exposition on Structural Dynamics, 2021, the sixth volume of nine from the Conference brings together contributions to this important area of research and engineering. The collection presents early findings and case studies on fundamental and applied aspects of Structural Health Monitoring, including papers on:Novel TechniquesOptical Methods,Scanning LDV MethodsPhotogrammetry & DICRotating Machinery
Rotating Relativistic Stars
by John L. Friedman Nikolaos StergioulasThe masses of neutron stars are limited by an instability to gravitational collapse and an instability driven by gravitational waves limits their spin. Their oscillations are relevant to x-ray observations of accreting binaries and to gravitational wave observations of neutron stars formed during the coalescence of double neutron-star systems. This volume includes more than forty years of research to provide graduate students and researchers in astrophysics, gravitational physics and astronomy with the first self-contained treatment of the structure, stability and oscillations of rotating neutron stars. This monograph treats the equations of stellar equilibrium; key approximations, including slow rotation and perturbations of spherical and rotating stars; stability theory and its applications, from convective stability to the r-mode instability; and numerical methods for computing equilibrium configurations and the nonlinear evolution of their oscillations. The presentation of fundamental equations, results and applications is accessible to readers who do not need the detailed derivations.
Rotating Thermal Flows in Natural and Industrial Processes
by Marcello LappaRotating Thermal Flows in Natural and Industrial Processes provides the reader with a systematic description of the different types of thermal convection and flow instabilities in rotating systems, as present in materials, crystal growth, thermal engineering, meteorology, oceanography, geophysics and astrophysics. It expressly shows how the isomorphism between small and large scale phenomena becomes beneficial to the definition and ensuing development of an integrated comprehensive framework. This allows the reader to understand and assimilate the underlying, quintessential mechanisms without requiring familiarity with specific literature on the subject. Topics treated in the first part of the book include: * Thermogravitational convection in rotating fluids (from laminar to turbulent states);* Stably stratified and unstratified shear flows;* Barotropic and baroclinic instabilities;* Rossby waves and Centrifugally-driven convection;* Potential Vorticity, Quasi-Geostrophic Theory and related theorems;* The dynamics of interacting vortices, interacting waves and mixed (hybrid) vortex-wave states;* Geostrophic Turbulence and planetary patterns. The second part is entirely devoted to phenomena of practical interest, i.e. subjects relevant to the realms of industry and technology, among them: * Surface-tension-driven convection in rotating fluids;* Differential-rotation-driven (forced) flows;* Crystal Growth from the melt of oxide or semiconductor materials;* Directional solidification;* Rotating Machinery;* Flow control by Rotating magnetic fields;* Angular Vibrations and Rocking motions; Covering a truly prodigious range of scales, from atmospheric and oceanic processes and fluid motion in "other solar-system bodies", to convection in its myriad manifestations in a variety of applications of technological relevance, this unifying text is an ideal reference for physicists and engineers, as well as an important resource for advanced students taking courses on the physics of fluids, fluid mechanics, thermal, mechanical and materials engineering, environmental phenomena, meteorology and geophysics.
Rotor Systems: Analysis and Identification
by Rajiv TiwariThe purpose of this book is to give a basic understanding of rotor dynamics phenomena with the help of simple rotor models and subsequently, the modern analysis methods for real life rotor systems. This background will be helpful in the identification of rotor-bearing system parameters and its use in futuristic model-based condition monitoring and, fault diagnostics and prognostics. The book starts with introductory material for finite element methods and moves to linear and non-linear vibrations, continuous systems, vibration measurement techniques, signal processing and error analysis, general identification techniques in engineering systems, and MATLAB analysis of simple rotors. Key Features: • Covers both transfer matrix methods (TMM) and finite element methods (FEM) • Discusses transverse and torsional vibrations • Includes worked examples with simplicity of mathematical background and a modern numerical method approach • Explores the concepts of instability analysis and dynamic balancing • Provides a basic understanding of rotor dynamics phenomena with the help of simple rotor models including modern analysis methods for real life rotor systems.
Rotorcraft Certification by Simulation and Analysis: An Introduction to the Principles and Practices (Springer Aerospace Technology)
by Mark White Gareth D. Padfield Stefan van ‘t Hoff Philipp Hofmeister Linghai Lu Giuseppe QuarantaThis open access book presents the steps necessary for the application of rotorcraft flight modelling and simulation and analysis in support of certification for compliance with EASA CS-27 and CS-29, SUBPART B—FLIGHT and other flight-related rules (e.g. CS-27/9, Appendix B, Airworthiness Criteria for Helicopter Instrument Flight). The material is presented in the form of a structured ‘Rotorcraft Certification by Simulation’ process, starting from the relevant paragraphs in the Certification Specifications, through a comprehensive description of the assembly of flight simulation requirements, informed by judgements on Influence, Predictability and Credibility, and on into the detailed building of the three major elements of the process; the Flight Simulation Model, the Flight Simulator, and the associated Flight Test Measurement System. The latter feeds both the flight model and simulator development with real-world test data to support validation and fidelity assessment. The book is intended to provide support to early adopters of simulation and analysis in the certification process, including those who have considerable experience and expertise in the use of Modelling and Simulation in support of design and development. It is acknowledged that there exists much good practice in the rotorcraft industry in this regard. However, what is presented herein is considered a significant step forward in the development of this practice, particularly in terms of the importance of a structured, requirements-based, process using adaptable-fidelity, descriptive and predictive simulation tools, and associated pre-certification flight testing, to reach the goal of a credible flight simulation.
Rotordynamics (Mechanical Engineering)
by Agnieszka MuszynskaAs the most important parts of rotating machinery, rotors are also the most prone to mechanical vibrations, which may lead to machine failure. Correction is only possible when proper and accurate diagnosis is obtained through understanding of rotor operation and all of the potential malfunctions that may occur. Mathematical modeling, in particular
Rotordynamics of Automotive Turbochargers
by Hung Nguyen-SchäferRotordynamics of automotive turbochargers is dealt with in this book encompassing the widely working field of small turbomachines under real operating conditions at the very high rotor speeds up to 300000 rpm. The broadly interdisciplinary field of turbocharger rotordynamics involves 1) Thermodynamics and Turbo-Matching of Turbochargers 2) Dynamics of Turbomachinery 3) Stability Analysis of Linear Rotordynamics with the Eigenvalue Theory 4) Stability Analysis of Nonlinear Rotordynamics with the Bifurcation Theory 5) Bearing Dynamics of the Oil Film using the Two-Phase Reynolds Equation 6) Computation of Nonlinear Responses of a Turbocharger Rotor 7) Aero and Vibroacoustics of Turbochargers 8) Shop and Trim Balancing at Two Planes of the Rotor 9) Tribology of the Bearing Surface Roughness 10) Design of Turbocharger Platforms using the Similarity Laws The rotor response of an automotive turbocharger at high rotor speeds is studied analytically, computationally, and experimentally. Due to the nonlinear characteristics of the oil-film bearings, some nonlinear responses of the rotor besides the harmonic response 1X, such as oil whirl, oil whip, and modulated frequencies occur in Waterfall diagram. Additionally, the influences of the surface roughness and oil characteristics on the rotor behavior, friction, and wear are discussed. This book is written by an industrial R&D expert with many years of experience in the automotive and turbocharger industries. The all-in-one book of turbochargers is intended for scientific and engineering researchers, practitioners working in the rotordynamics field of automotive turbochargers, and graduate students in applied physics and mechanical engineering.