Fundamentals of Modern Unsteady Aerodynamics

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Author: Ülgen Gülçat

Publisher: Springer

ISBN: 9811000182

Category: Technology & Engineering

Page: 395

View: 7576

In this book, the author introduces the concept of unsteady aerodynamics and its underlying principles. He provides the readers with a comprehensive review of the fundamental physics of free and forced unsteadiness, the terminology and basic equations of aerodynamics ranging from incompressible flow to hypersonics. The book also covers modern topics related to the developments made in recent years, especially in relation to wing flapping for propulsion. The book is written for graduate and senior year undergraduate students in aerodynamics and also serves as a reference for experienced researchers. Each chapter includes ample examples, questions, problems and relevant references. The treatment of these modern topics has been completely revised end expanded for the new edition. It now includes new numerical examples, a section on the ground effect, and state-space representation.

The DelFly

Design, Aerodynamics, and Artificial Intelligence of a Flapping Wing Robot

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Author: G.C.H.E. de Croon,M. Perçin,B.D.W. Remes,R. Ruijsink,C. De Wagter

Publisher: Springer

ISBN: 9401792089

Category: Technology & Engineering

Page: 218

View: 4883

This book introduces the topics most relevant to autonomously flying flapping wing robots: flapping-wing design, aerodynamics, and artificial intelligence. Readers can explore these topics in the context of the "Delfly", a flapping wing robot designed at Delft University in The Netherlands. How are tiny fruit flies able to lift their weight, avoid obstacles and predators, and find food or shelter? The first step in emulating this is the creation of a micro flapping wing robot that flies by itself. The challenges are considerable: the design and aerodynamics of flapping wings are still active areas of scientific research, whilst artificial intelligence is subject to extreme limitations deriving from the few sensors and minimal processing onboard. This book conveys the essential insights that lie behind success such as the DelFly Micro and the DelFly Explorer. The DelFly Micro, with its 3.07 grams and 10 cm wing span, is still the smallest flapping wing MAV in the world carrying a camera, whilst the DelFly Explorer is the world's first flapping wing MAV that is able to fly completely autonomously in unknown environments. The DelFly project started in 2005 and ever since has served as inspiration, not only to many scientific flapping wing studies, but also the design of flapping wing toys. The combination of introductions to relevant fields, practical insights and scientific experiments from the DelFly project make this book a must-read for all flapping wing enthusiasts, be they students, researchers, or engineers.

Elements of Vorticity Aerodynamics

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Author: James C. Wu

Publisher: Springer

ISBN: 3662440407

Category: Technology & Engineering

Page: 140

View: 7425

This book opens with a discussion of the vorticity-dynamic formulation of the low Mach number viscous flow problem. It examines the physical aspects of the velocity and the vorticity fields, their instantaneous relationship, and the transport of vorticity in viscous fluids for steady and unsteady flows. Subsequently, using classical analyses it explores the mathematical aspects of vorticity dynamics and issues of initial and boundary conditions for the viscous flow problem. It also includes the evolution of the vorticity field which surrounds and trails behind airfoils and wings, generalizations of Helmholtz’ vortex theorems and the Biot-Savart Law. The book introduces a theorem that relates the aerodynamic force to the vorticity moment and reviews the applications of the theorem. Further, it presents interpretations of the Kutta-Joukowski theorem and Prandtl’s lifting line theory for vorticity dynamics and discusses wake integral methods. The virtual-mass effect is shown to be the seminal event in unsteady aerodynamics and a simple approach for evaluating virtual-mass forces on the basis of vorticity dynamics is presented. The book presents a modern viewpoint on vorticity dynamics as the framework for understanding and establishing the fundamental principles of viscous and unsteady aerodynamics. It is intended for graduate-level students of classical aerodynamics and researchers exploring the frontiers of fully unsteady and non-streamlined aerodynamics.

Aerodynamics of Wings and Bodies

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Author: Holt Ashley,Marten Landahl

Publisher: Courier Corporation

ISBN: 0486648990

Category: Science

Page: 279

View: 7295

This excellent, innovative reference offers a wealth of useful information and a solid background in the fundamentals of aerodynamics. Fluid mechanics, constant density inviscid flow, singular perturbation problems, viscosity, thin-wing and slender body theories, drag minimalization, and other essentials are addressed in a lively, literate manner and accompanied by diagrams.

Fundamentals of Aerodynamics

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Author: John David Anderson

Publisher: McGraw-Hill Education Limited

ISBN: 9781259251344

Category: Aerodynamics

Page: 1130

View: 1842

Offering an up-to-date overview of the field of aerodynamics, this edition covers many of the key concepts and topics, such as linearized supersonic flow and oblique shock and expansion waves. The 6th edition of Fundamentals of Aerodynamics is meant to be read. The writing style is intentionally conversational in order to make the book easier to read. The book is designed to talk to the reader; in part to be a self-teaching instrument. Learning objectives have been added to each chapter to reflect what is believed to be the most important items to learn from that particular chapter. The 6th edition emphasizes the rich theoretical and physical background of aerodynamics, and marbles in many historical notes to provide a background as to where the aerodynamic technology comes from. Also new with this edition, are Integrated Work Challenges that pertain to the chapter as a whole, and give the reader the opportunity to integrate the material in that chapter in order to solve a "bigger picture". Now available with the sixth edition of Fundamentals of Aerodynamics, Connect. Connect is the only integrated learning system that empowers students by continuously adapting to deliver precisely what they need, when they need it, how they need it, so that your class time is more engaging and effective. Within Connect, SmartBook is available with the 6th edition as well. SmartBook is the first and only adaptive eBook for the Higher Education market. SmartBook facilitates the reading process by using practice questions to identify what content a student knows and doesn't know. As a student reads the text, the material continuously adapts to ensure that he or she is focused on the content most crucial to closing specific knowledge gaps

Principles of Helicopter Aerodynamics with CD Extra

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Author: J. Gordon Leishman

Publisher: Cambridge University Press

ISBN: 9780521858601

Category: Science

Page: 826

View: 6959

Written by an internationally recognized teacher and researcher, this book provides a thorough, modern treatment of the aerodynamic principles of helicopters and other rotating-wing vertical lift aircraft such as tilt rotors and autogiros. The text begins with a unique technical history of helicopter flight, and then covers basic methods of rotor aerodynamic analysis, and related issues associated with the performance of the helicopter and its aerodynamic design. It goes on to cover more advanced topics in helicopter aerodynamics, including airfoil flows, unsteady aerodynamics, dynamic stall, and rotor wakes, and rotor-airframe aerodynamic interactions, with final chapters on autogiros and advanced methods of helicopter aerodynamic analysis. Extensively illustrated throughout, each chapter includes a set of homework problems. Advanced undergraduate and graduate students, practising engineers, and researchers will welcome this thoroughly revised and updated text on rotating-wing aerodynamics.

Aeroelasticity

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Author: Raymond L. Bisplinghoff,Holt Ashley,Robert L. Halfman

Publisher: Courier Corporation

ISBN: 0486132439

Category: Technology & Engineering

Page: 880

View: 2550

Highly regarded text deals with aeroelasticity as well as underlying aerodynamic and structural tools. Topics include incompressible flow, flutter, model theory, and much more. Over 300 illustrations. 1955 edition.

Low-Speed Aerodynamics

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Author: Joseph Katz,Allen Plotkin

Publisher: Cambridge University Press

ISBN: 9780521665520

Category: Mathematics

Page: 613

View: 1373

Low-speed aerodynamics is important in the design and operation of aircraft flying at low Mach number, and ground and marine vehicles. This 2001 book offers a modern treatment of the subject, both the theory of inviscid, incompressible, and irrotational aerodynamics and the computational techniques now available to solve complex problems. A unique feature of the text is that the computational approach (from a single vortex element to a three-dimensional panel formulation) is interwoven throughout. Thus, the reader can learn about classical methods of the past, while also learning how to use numerical methods to solve real-world aerodynamic problems. This second edition has a new chapter on the laminar boundary layer (emphasis on the viscous-inviscid coupling), the latest versions of computational techniques, and additional coverage of interaction problems. It includes a systematic treatment of two-dimensional panel methods and a detailed presentation of computational techniques for three-dimensional and unsteady flows. With extensive illustrations and examples, this book will be useful for senior and beginning graduate-level courses, as well as a helpful reference tool for practising engineers.

Theoretical and Computational Aerodynamics

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Author: Tapan K. Sengupta

Publisher: John Wiley & Sons

ISBN: 1118787579

Category: Technology & Engineering

Page: 516

View: 2880

Aerodynamics has seen many developments due to the growth of scientific computing, which has caused the design cycle time of aerospace vehicles to be heavily reduced. Today computational aerodynamics appears in the preliminary step of a new design, relegating costly, time-consuming wind tunnel testing to the final stages of design. Theoretical and Computational Aerodynamics is aimed to be a comprehensive textbook, covering classical aerodynamic theories and recent applications made possible by computational aerodynamics. It starts with a discussion on lift and drag from an overall dynamical approach, and after stating the governing Navier-Stokes equation, covers potential flows and panel method. Low aspect ratio and delta wings (including vortex breakdown) are also discussed in detail, and after introducing boundary layer theory, computational aerodynamics is covered for DNS and LES. Other topics covered are on flow transition to analyse NLF airfoils, bypass transition, streamwise and cross-flow instability over swept wings, viscous transonic flow over airfoils, low Reynolds number aerodynamics, high lift devices and flow control. Key features: Blends classical theories of incompressible aerodynamics to panel methods Covers lifting surface theories and low aspect ratio wing and wing-body aerodynamics Presents computational aerodynamics from first principles for incompressible and compressible flows Covers unsteady and low Reynolds number aerodynamics Includes an up-to-date account of DNS of airfoil aerodynamics including flow transition for NLF airfoils Contains chapter problems and illustrative examples Accompanied by a website hosting problems and a solution manual Theoretical and Computational Aerodynamics is an ideal textbook for undergraduate and graduate students, and is also aimed to be a useful resource book on aerodynamics for researchers and practitioners in the research labs and the industry.

A Modern Course in Aeroelasticity

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Author: Robert Clark,E.H. Dowell

Publisher: Springer Science & Business Media

ISBN: 9781402027116

Category: Mathematics

Page: 746

View: 8783

In this new edition, the fundamental material on classical linear aeroelasticity has been revised. Also new material has been added describing recent results on the research frontiers dealing with nonlinear aeroelasticity as well as major advances in the modelling of unsteady aerodynamic flows using the methods of computational fluid dynamics and reduced order modeling techniques. New chapters on aeroelasticity in turbomachinery and aeroelasticity and the latter chapters for a more advanced course, a graduate seminar or as a reference source for an entrée to the research literature.

Aerodynamics for Engineering Students

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Author: E. L. Houghton,P. W. Carpenter,Steven H. Collicott,Daniel T. Valentine

Publisher: Butterworth-Heinemann

ISBN: 0081002327

Category: Technology & Engineering

Page: 688

View: 1330

Aerodynamics for Engineering Students, Seventh Edition, is one of the world’s leading course texts on aerodynamics. It provides concise explanations of basic concepts, combined with an excellent introduction to aerodynamic theory. This updated edition has been revised with improved pedagogy and reorganized content to facilitate student learning, and includes new or expanded coverage in several important areas, such as hypersonic flow, UAV’s, and computational fluid dynamics. Provides contemporary applications and examples that help students see the link between everyday physical examples of aerodynamics and the application of aerodynamic principles to aerodynamic design Contains MATLAB-based computational exercises throughout, giving students practice in using industry-standard computational tools Includes examples in SI and Imperial units, reflecting the fact that the aerospace industry uses both systems of units Improved pedagogy, including more examples and end-of-chapter problems, and additional and updated MATLAB codes

Introduction to Aircraft Aeroelasticity and Loads

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Author: Jan R. Wright,Jonathan Edward Cooper

Publisher: John Wiley & Sons

ISBN: 1118700430

Category: Technology & Engineering

Page: 576

View: 2249

Introduction to Aircraft Aeroelasticity and Loads, Second Edition is an updated new edition offering comprehensive coverage of the main principles of aircraft aeroelasticity and loads. For ease of reference, the book is divided into three parts and begins by reviewing the underlying disciplines of vibrations, aerodynamics, loads and control, and then goes on to describe simplified models to illustrate aeroelastic behaviour and aircraft response and loads for the flexible aircraft before introducing some more advanced methodologies. Finally, it explains how industrial certification requirements for aeroelasticity and loads may be met and relates these to the earlier theoretical approaches used. Key features of this new edition include: Uses a unified simple aeroelastic model throughout the book Major revisions to chapters on aeroelasticity Updates and reorganisation of chapters involving Finite Elements Some reorganisation of loads material Updates on certification requirements Accompanied by a website containing a solutions manual, and MATLAB® and SIMULINK® programs that relate to the models used For instructors who recommend this textbook, a series of lecture slides are also available Introduction to Aircraft Aeroelasticity and Loads, Second Edition is a must-have reference for researchers and practitioners working in the aeroelasticity and loads fields, and is also an excellent textbook for senior undergraduate and graduate students in aerospace engineering.

Basics of Aerothermodynamics

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Author: Ernst Heinrich Hirschel

Publisher: Springer

ISBN: 3319143735

Category: Technology & Engineering

Page: 446

View: 1873

This successful book gives an introduction to the basics of aerothermodynamics, as applied in particular to winged re-entry vehicles and airbreathing hypersonic cruise and acceleration vehicles. The book gives a review of the issues of transport of momentum, energy and mass, real-gas effects as well as inviscid and viscous flow phenomena. In this second, revised edition the chapters with the classical topics of aerothermodynamics more or less were left untouched. The access to some single topics of practical interest was improved. Auxiliary chapters were put into an appendix. The recent successful flights of the X-43A and the X-51A indicate that the dawn of sustained airbreathing hypersonic flight now has arrived. This proves that the original approach of the book to put emphasis on viscous effects and the aerothermodynamics of radiation-cooled vehicle surfaces was timely. This second, revised edition even more accentuates these topics. A new, additional chapter treats examples of viscous thermal surface effects. Partly only very recently obtained experimental and numerical results show the complexity of such phenomena (dependence of boundary-layer stability, skin friction, boundary-layer thicknesses, and separation on the thermal state of the surface) and their importance for airbreathing hypersonic flight vehicles, but also for any other kind of hypersonic vehicle.

Flight Vehicle Aerodynamics

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Author: Mark Drela

Publisher: MIT Press

ISBN: 0262526441

Category: Science

Page: 304

View: 7809

An overview of the physics, concepts, theories, and models underlying the discipline of aerodynamics.

Aeroelasticity

The Continuum Theory

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Author: AV Balakrishnan

Publisher: Springer Science & Business Media

ISBN: 1461436095

Category: Mathematics

Page: 400

View: 9210

The author's approach is one of continuum models of the aerodynamic flow interacting with a flexible structure whose behavior is governed by partial differential equations. Both linear and nonlinear models are considered although much of the book is concerned with the former while keeping the latter clearly in view. A complete chapter is also devoted to nonlinear theory. The author has provided new insights into the classical inviscid aerodynamics and raises novel and interesting questions on fundamental issues that have too often been neglected or forgotten in the development of the early history of the subject. The author contrasts his approach with discrete models for the unsteady aerodynamic flow and the finite element model for the structure. Much of the aeroelasticity has been developed with applications formerly in mind because of its enormous consequences for the safety of aircraft. Aeroelastic instabilities such as divergence and flutter and aeroelastic responses to gusts can pose a significant hazard to the aircraft and impact its performance. Yet, it is now recognized that there are many other physical phenomena that have similar characteristics ranging from flows around flexible tall buildings and long span bridges, alternate energy sources such as electric power generation by smart structures to flows internal to the human body. From the foreword: "For the theorist and applied mathematician who wishes an introduction to this fascinating subject as well as for the experienced aeroelastician who is open to new challenges and a fresh viewpoint, this book and its author have much to offer the reader." Earl Dowell, Duke University, USA

Parallel Computational Fluid Dynamics 2007

Implementations and Experiences on Large Scale and Grid Computing

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Author: Ismail H. Tuncer,Ülgen Gülcat,David R. Emerson,Kenichi Matsuno

Publisher: Springer Science & Business Media

ISBN: 3540927441

Category: Mathematics

Page: 488

View: 3540

At the 19th Annual Conference on Parallel Computational Fluid Dynamics held in Antalya, Turkey, in May 2007, the most recent developments and implementations of large-scale and grid computing were presented. This book, comprised of the invited and selected papers of this conference, details those advances, which are of particular interest to CFD and CFD-related communities. It also offers the results related to applications of various scientific and engineering problems involving flows and flow-related topics. Intended for CFD researchers and graduate students, this book is a state-of-the-art presentation of the relevant methodology and implementation techniques of large-scale computing.

Aerodynamics of Low Reynolds Number Flyers

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Author: Wei Shyy,Yongsheng Lian,Jian Tang,Dragos Viieru,Hao Liu

Publisher: Cambridge University Press

ISBN: 113946891X

Category: Technology & Engineering

Page: N.A

View: 4199

Low Reynolds number aerodynamics is important to a number of natural and man-made flyers. Birds, bats, and insects have been of interest to biologists for years, and active study in the aerospace engineering community, motivated by interest in micro air vehicles (MAVs), has been increasing rapidly. The focus of this book is the aerodynamics associated with fixed and flapping wings. The book considers both biological flyers and MAVs, including a summary of the scaling laws which relate the aerodynamics and flight characteristics to a flyer's sizing on the basis of simple geometric and dynamics analyses, structural flexibility, laminar-turbulent transition, airfoil shapes, and unsteady flapping wing aerodynamics. The interplay between flapping kinematics and key dimensionless parameters such as the Reynolds number, Strouhal number, and reduced frequency is highlighted. The various unsteady lift enhancement mechanisms are also addressed.

Application of Thermo-Fluidic Measurement Techniques

An Introduction

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Author: Tongbeum Kim,Tianjian Lu,Seung Jin Song

Publisher: Butterworth-Heinemann

ISBN: 0128098740

Category: Technology & Engineering

Page: 274

View: 6850

Application of Thermo-Fluidic Measurement Techniques: An Introduction provides essential measurement techniques in heat transfer and aerodynamics. In addition to a brief, but physically elaborate description of the principles of each technique, multiple examples for each technique are included. These examples elaborate all the necessary details of (a) test setups, (b) calibration, (c) data acquisition procedure, and (d) data interpretation, with comments on the limitations of each technique and how to avoid mistakes that are based on the authors’ experience. The authors have different expertise in convection heat transfer and aerodynamics, and have collaborated on various research projects that employ a variety of experimental techniques. Each author has a different view and approach to individual experimental techniques, but these views complement each other, giving new users of each technique a rounded view. With the introduction of this valuable reference book, the reader can quickly learn both the overall and detailed aspects of each experimental technique and then apply them to their own work. Contains both basic principles and fundamental, physical descriptions Provides examples that demonstrate how each experimental technique can be used for industrial testing and academic research in heat transfer and aerodynamics Includes practical and in-depth examples for each technique, with comments on each experimental technique based on the authors’ experiences, including limitations and trial errors with some examples of data interpretation Combines classical techniques in aerodynamics and conduction/convection heat transfer with modern, cutting-edge approaches Collates the information about various pointwise and whole field velocity and thermal measurement techniques in a single resource