Capitalizing On Convective Instabilities In A Streamwise Vortex Wall Interaction

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Capitalizing on Convective Instabilities in a Streamwise Vortex-wall Interaction

Author : Stuart Ira Benton
Publisher :
ISBN 13 :
Total Pages : 148 pages
Book Rating : 4.:/5 (933 download)

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Book Synopsis Capitalizing on Convective Instabilities in a Streamwise Vortex-wall Interaction by : Stuart Ira Benton

Download or read book Capitalizing on Convective Instabilities in a Streamwise Vortex-wall Interaction written by Stuart Ira Benton and published by . This book was released on 2015 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: Secondary flows in turbomachinery and similar engineering applications are often dominated by a single streamwise vortex structure. Investigations into the control of these flows using periodic forcing have shown a discrete range of forcing frequency where the vortex is particularly receptive. Forcing in this frequency range results in increased movement of the vortex and decreased total pressure losses. Based on the hypothesis that this occurs due to a linear instability associated with the Crow instability, a fundamental study of instabilities in streamwise vortex-wall interactions is performed. In the first part of this study a three-dimensional vortex-wall interaction is computed and analyzed for the presence of convective instabilities. It is shown that the Crow instability and a range of elliptic instabilities exist in a similar form as to what has been studied in counter-rotating vortex pairs. The Crow instability is particularly affected by the presence of a solid no-slip wall. Differences in the amplification rate, oscillation angle, Reynolds number sensitivity, and transient growth are each discussed. The spatial development of the vortex-wall interaction is shown to have a further stabilizing effect on the Crow instability due to a "lift-off" behavior. Despite these discoveries, it is still shown that amplitude growth on the order of 20% is possible and transient growth mechanisms might result in an order-of-magnitude of further growth if properly initiated. With these results in mind, an experiment is developed to isolate the streamwise vortex-wall interaction. Through the use of a vortex generating wing section and a suspended splitter plate, a stable interaction is created that agrees favorably in structure to the three-dimensional computations. A small synthetic jet actuator is mounted on the splitter plate below the vortex. Phase-locked stereo-PIV velocity data and surface pressure taps both show spatial amplification of the disturbance in a frequency range which agrees well with the prediction for the Crow instability. An analysis of the vortex response shows a primarily horizontal oscillation of the vortex column which strongly interacts with the secondary vortex structure that develops in the boundary layer.

An Instability in Vortex/wall-layer Interactions at High Reynolds Number

Author : Kevin W. Brinckman
Publisher :
ISBN 13 :
Total Pages : 646 pages
Book Rating : 4.:/5 (357 download)

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Book Synopsis An Instability in Vortex/wall-layer Interactions at High Reynolds Number by : Kevin W. Brinckman

Download or read book An Instability in Vortex/wall-layer Interactions at High Reynolds Number written by Kevin W. Brinckman and published by . This book was released on 1996 with total page 646 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Vortex Ring/moving Wall Interactions

Author : Steven Yueshsan Liang
Publisher :
ISBN 13 :
Total Pages : 252 pages
Book Rating : 4.3/5 (129 download)

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Book Synopsis Vortex Ring/moving Wall Interactions by : Steven Yueshsan Liang

Download or read book Vortex Ring/moving Wall Interactions written by Steven Yueshsan Liang and published by . This book was released on 1984 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Machine Learning Control – Taming Nonlinear Dynamics and Turbulence

Author : Thomas Duriez
Publisher : Springer
ISBN 13 : 3319406248
Total Pages : 229 pages
Book Rating : 4.3/5 (194 download)

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Book Synopsis Machine Learning Control – Taming Nonlinear Dynamics and Turbulence by : Thomas Duriez

Download or read book Machine Learning Control – Taming Nonlinear Dynamics and Turbulence written by Thomas Duriez and published by Springer. This book was released on 2016-11-02 with total page 229 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the first textbook on a generally applicable control strategy for turbulence and other complex nonlinear systems. The approach of the book employs powerful methods of machine learning for optimal nonlinear control laws. This machine learning control (MLC) is motivated and detailed in Chapters 1 and 2. In Chapter 3, methods of linear control theory are reviewed. In Chapter 4, MLC is shown to reproduce known optimal control laws for linear dynamics (LQR, LQG). In Chapter 5, MLC detects and exploits a strongly nonlinear actuation mechanism of a low-dimensional dynamical system when linear control methods are shown to fail. Experimental control demonstrations from a laminar shear-layer to turbulent boundary-layers are reviewed in Chapter 6, followed by general good practices for experiments in Chapter 7. The book concludes with an outlook on the vast future applications of MLC in Chapter 8. Matlab codes are provided for easy reproducibility of the presented results. The book includes interviews with leading researchers in turbulence control (S. Bagheri, B. Batten, M. Glauser, D. Williams) and machine learning (M. Schoenauer) for a broader perspective. All chapters have exercises and supplemental videos will be available through YouTube.

Ground and Flight Evaluation of a Small-Scale Inflatable-Winged Aircraft

Author :
Publisher :
ISBN 13 :
Total Pages : 24 pages
Book Rating : 4.:/5 (317 download)

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Book Synopsis Ground and Flight Evaluation of a Small-Scale Inflatable-Winged Aircraft by :

Download or read book Ground and Flight Evaluation of a Small-Scale Inflatable-Winged Aircraft written by and published by . This book was released on 2002 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: A small-scale, instrumented research aircraft was flown to investigate the flight characteristics of inflatable wings. Ground tests measured the static structural characteristics of the wing at different inflation pressures, and these results compared favorably with analytical predictions. A research-quality instrumentation system was assembled, largely from commercial off-the-shelf components, and installed in the aircraft. Initial flight operations were conducted with a conventional rigid wing having the same dimensions as the inflatable wing. Subsequent flights were conducted with the inflatable wing. Research maneuvers were executed to identify the trim, aerodynamic performance, and longitudinal stability and control characteristics of the vehicle in its different wing configurations. For the angle-of-attack range spanned in this flight program.

Elasticity and Fluid Dynamics: Volume 3 of Modern Classical Physics

Author : Kip S. Thorne
Publisher : Princeton University Press
ISBN 13 : 069121557X
Total Pages : 480 pages
Book Rating : 4.6/5 (912 download)

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Book Synopsis Elasticity and Fluid Dynamics: Volume 3 of Modern Classical Physics by : Kip S. Thorne

Download or read book Elasticity and Fluid Dynamics: Volume 3 of Modern Classical Physics written by Kip S. Thorne and published by Princeton University Press. This book was released on 2021-05-25 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt: A groundbreaking textbook on twenty-first-century fluids and elastic solids and their applications Kip Thorne and Roger Blandford’s monumental Modern Classical Physics is now available in five stand-alone volumes that make ideal textbooks for individual graduate or advanced undergraduate courses on statistical physics; optics; elasticity and fluid dynamics; plasma physics; and relativity and cosmology. Each volume teaches the fundamental concepts, emphasizes modern, real-world applications, and gives students a physical and intuitive understanding of the subject. Elasticity and Fluid Dynamics provides an essential introduction to these subjects. Fluids and elastic solids are everywhere—from Earth’s crust and skyscrapers to ocean currents and airplanes. They are central to modern physics, astrophysics, the Earth sciences, biophysics, medicine, chemistry, engineering, and technology, and this centrality has intensified in recent years—so much so that a basic understanding of the behavior of elastic solids and fluids should be part of the repertoire of every physicist and engineer and almost every other natural scientist. While both elasticity and fluid dynamics involve continuum physics and use similar mathematical tools and modes of reasoning, each subject can be readily understood without the other, and the book allows them to be taught independently, with the first two chapters introducing and covering elasticity and the last six doing the same for fluid dynamics. The book also can serve as supplementary reading for many other courses, including in astrophysics, geophysics, and aerodynamics. Includes many exercise problems Features color figures, suggestions for further reading, extensive cross-references, and a detailed index Optional “Track 2” sections make this an ideal book for a one-quarter or one-semester course in elasticity, fluid dynamics, or continuum physics An online illustration package is available to professors The five volumes, which are available individually as paperbacks and ebooks, are Statistical Physics; Optics; Elasticity and Fluid Dynamics; Plasma Physics; and Relativity and Cosmology.

Technology and the Air Force

Author : Jacob Neufeld
Publisher : DIANE Publishing
ISBN 13 : 1437912877
Total Pages : 344 pages
Book Rating : 4.4/5 (379 download)

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Book Synopsis Technology and the Air Force by : Jacob Neufeld

Download or read book Technology and the Air Force written by Jacob Neufeld and published by DIANE Publishing. This book was released on 2009-06 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of a symposium co-sponsored by the Air Force Historical Foundation and the Air Force History and Museums Program. The symposium covered relevant Air Force technologies ranging from the turbo-jet revolution of the 1930s to the stealth revolution of the 1990s. Illustrations.

Stability and Transition in Shear Flows

Author : Peter J. Schmid
Publisher : Springer Science & Business Media
ISBN 13 : 1461301858
Total Pages : 561 pages
Book Rating : 4.4/5 (613 download)

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Book Synopsis Stability and Transition in Shear Flows by : Peter J. Schmid

Download or read book Stability and Transition in Shear Flows written by Peter J. Schmid and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 561 pages. Available in PDF, EPUB and Kindle. Book excerpt: A detailed look at some of the more modern issues of hydrodynamic stability, including transient growth, eigenvalue spectra, secondary instability. It presents analytical results and numerical simulations, linear and selected nonlinear stability methods. By including classical results as well as recent developments in the field of hydrodynamic stability and transition, the book can be used as a textbook for an introductory, graduate-level course in stability theory or for a special-topics fluids course. It is equally of value as a reference for researchers in the field of hydrodynamic stability theory or with an interest in recent developments in fluid dynamics. Stability theory has seen a rapid development over the past decade, this book includes such new developments as direct numerical simulations of transition to turbulence and linear analysis based on the initial-value problem.

Aeroacoustic Measurements

Author : Thomas J. Mueller
Publisher : Springer Science & Business Media
ISBN 13 : 3662050587
Total Pages : 327 pages
Book Rating : 4.6/5 (62 download)

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Book Synopsis Aeroacoustic Measurements by : Thomas J. Mueller

Download or read book Aeroacoustic Measurements written by Thomas J. Mueller and published by Springer Science & Business Media. This book was released on 2013-11-27 with total page 327 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book describes recent developments in aeroacoustic measurements in wind tunnels and the interpretation of the resulting data. The reader will find the latest measurement techniques described along with examples of the results.

Anatomy and Physiology of the Circulatory and Ventilatory Systems

Author : Marc Thiriet
Publisher : Springer Science & Business Media
ISBN 13 : 1461494699
Total Pages : 594 pages
Book Rating : 4.4/5 (614 download)

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Book Synopsis Anatomy and Physiology of the Circulatory and Ventilatory Systems by : Marc Thiriet

Download or read book Anatomy and Physiology of the Circulatory and Ventilatory Systems written by Marc Thiriet and published by Springer Science & Business Media. This book was released on 2013-11-27 with total page 594 pages. Available in PDF, EPUB and Kindle. Book excerpt: Together, the volumes in this series present all of the data needed at various length scales for a multidisciplinary approach to modeling and simulation of flows in the cardiovascular and ventilatory systems, especially multiscale modeling and coupled simulations. The cardiovascular and respiratory systems are tightly coupled, as their primary function is to supply oxygen to, and remove carbon dioxide from, the body's cells. Because physiological conduits have deformable and reactive walls, macroscopic flow behavior and prediction must be coupled to nano- and microscopic events in a corrector scheme of regulated mechanism. Therefore, investigation of flows of blood and air in physiological conduits requires an understanding of the biology, chemistry, and physics of these systems, together with the mathematical tools to describe their functioning in quantitative terms. The present volume focuses on macroscopic aspects of the cardiovascular and respiratory systems in normal conditions, i.e., anatomy and physiology, as well as the acquisition and processing of medical images and physiological signals.

Advanced Structural Wind Engineering

Author : Yukio Tamura
Publisher : Springer Science & Business Media
ISBN 13 : 4431543376
Total Pages : 414 pages
Book Rating : 4.4/5 (315 download)

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Book Synopsis Advanced Structural Wind Engineering by : Yukio Tamura

Download or read book Advanced Structural Wind Engineering written by Yukio Tamura and published by Springer Science & Business Media. This book was released on 2013-07-19 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book serves as a textbook for advanced courses as it introduces state-of-the-art information and the latest research results on diverse problems in the structural wind engineering field. The topics include wind climates, design wind speed estimation, bluff body aerodynamics and applications, wind-induced building responses, wind, gust factor approach, wind loads on components and cladding, debris impacts, wind loading codes and standards, computational tools and computational fluid dynamics techniques, habitability to building vibrations, damping in buildings, and suppression of wind-induced vibrations. Graduate students and expert engineers will find the book especially interesting and relevant to their research and work.

Spectral Methods for Uncertainty Quantification

Author : Olivier Le Maitre
Publisher : Springer Science & Business Media
ISBN 13 : 9048135206
Total Pages : 542 pages
Book Rating : 4.0/5 (481 download)

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Book Synopsis Spectral Methods for Uncertainty Quantification by : Olivier Le Maitre

Download or read book Spectral Methods for Uncertainty Quantification written by Olivier Le Maitre and published by Springer Science & Business Media. This book was released on 2010-03-11 with total page 542 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book deals with the application of spectral methods to problems of uncertainty propagation and quanti?cation in model-based computations. It speci?cally focuses on computational and algorithmic features of these methods which are most useful in dealing with models based on partial differential equations, with special att- tion to models arising in simulations of ?uid ?ows. Implementations are illustrated through applications to elementary problems, as well as more elaborate examples selected from the authors’ interests in incompressible vortex-dominated ?ows and compressible ?ows at low Mach numbers. Spectral stochastic methods are probabilistic in nature, and are consequently rooted in the rich mathematical foundation associated with probability and measure spaces. Despite the authors’ fascination with this foundation, the discussion only - ludes to those theoretical aspects needed to set the stage for subsequent applications. The book is authored by practitioners, and is primarily intended for researchers or graduate students in computational mathematics, physics, or ?uid dynamics. The book assumes familiarity with elementary methods for the numerical solution of time-dependent, partial differential equations; prior experience with spectral me- ods is naturally helpful though not essential. Full appreciation of elaborate examples in computational ?uid dynamics (CFD) would require familiarity with key, and in some cases delicate, features of the associated numerical methods. Besides these shortcomings, our aim is to treat algorithmic and computational aspects of spectral stochastic methods with details suf?cient to address and reconstruct all but those highly elaborate examples.

Schaum's Outline of Fluid Mechanics

Author : Merle C. Potter
Publisher : McGraw Hill Professional
ISBN 13 : 007159454X
Total Pages : 260 pages
Book Rating : 4.0/5 (715 download)

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Book Synopsis Schaum's Outline of Fluid Mechanics by : Merle C. Potter

Download or read book Schaum's Outline of Fluid Mechanics written by Merle C. Potter and published by McGraw Hill Professional. This book was released on 2007-12-31 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt: Study faster, learn better--and get top grades with Schaum's Outlines Millions of students trust Schaum's Outlines to help them succeed in the classroom and on exams. Schaum's is the key to faster learning and higher grades in every subject. Each Outline presents all the essential course information in an easy-to-follow, topic-by-topic format. You also get hundreds of examples, solved problems, and practice exercises to test your skills. Use Schaum's Outlines to: Brush up before tests Find answers fast Study quickly and more effectively Get the big picture without spending hours poring over lengthy textbooks Fully compatible with your classroom text, Schaum's highlights all the important facts you need to know. Use Schaum's to shorten your study time--and get your best test scores! This Schaum's Outline gives you: A concise guide to the standard college course influid dynamics 480 problems with answers or worked-out solutions Practice problems in multiple-choice format like thoseon the Fundamentals of Engineering Exam

Pattern Formation in Continuous and Coupled Systems

Author : Martin Golubitsky
Publisher : Springer Science & Business Media
ISBN 13 : 9780387988740
Total Pages : 354 pages
Book Rating : 4.9/5 (887 download)

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Book Synopsis Pattern Formation in Continuous and Coupled Systems by : Martin Golubitsky

Download or read book Pattern Formation in Continuous and Coupled Systems written by Martin Golubitsky and published by Springer Science & Business Media. This book was released on 1999-06-22 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt: Systems that generate new types of pattern such as discrete coupled systems, systems with global coupling, and combustion experiments were stressed, as were new types of pattern."--BOOK JACKET.

Centrifugal Pumps

Author : Johann Friedrich Gülich
Publisher : Springer
ISBN 13 : 3642401147
Total Pages : 1146 pages
Book Rating : 4.6/5 (424 download)

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Book Synopsis Centrifugal Pumps by : Johann Friedrich Gülich

Download or read book Centrifugal Pumps written by Johann Friedrich Gülich and published by Springer. This book was released on 2014-10-24 with total page 1146 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gives an unparalleled, up-to-date, in-depth treatment of all kinds of flow phenomena encountered in centrifugal pumps including the complex interactions of fluid flow with vibrations and wear of materials. The scope includes all aspects of hydraulic design, 3D-flow phenomena and partload operation, cavitation, numerical flow calculations, hydraulic forces, pressure pulsations, noise, pump vibrations (notably bearing housing vibration diagnostics and remedies), pipe vibrations, pump characteristics and pump operation, design of intake structures, the effects of highly viscous flows, pumping of gas-liquid mixtures, hydraulic transport of solids, fatigue damage to impellers or diffusers, material selection under the aspects of fatigue, corrosion, erosion-corrosion or hydro-abrasive wear, pump selection, and hydraulic quality criteria. As a novelty, the 3rd ed. brings a fully analytical design method for radial impellers, which eliminates the arbitrary choices inherent to former design procedures. The discussions of vibrations, noise, unsteady flow phenomena, stability, hydraulic excitation forces and cavitation have been significantly enhanced. To ease the use of the information, the methods and procedures for the various calculations and failure diagnostics discussed in the text are gathered in about 150 pages of tables which may be considered as almost unique in the open literature. The text focuses on practical application in the industry and is free of mathematical or theoretical ballast. In order to find viable solutions in practice, the physical mechanisms involved should be thoroughly understood. The book is focused on fostering this understanding which will benefit the pump engineer in industry as well as academia and students.

CRC Handbook of Thermal Engineering

Author : Raj P. Chhabra
Publisher : CRC Press
ISBN 13 : 1351646036
Total Pages : 1801 pages
Book Rating : 4.3/5 (516 download)

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Book Synopsis CRC Handbook of Thermal Engineering by : Raj P. Chhabra

Download or read book CRC Handbook of Thermal Engineering written by Raj P. Chhabra and published by CRC Press. This book was released on 2017-11-08 with total page 1801 pages. Available in PDF, EPUB and Kindle. Book excerpt: The CRC Handbook of Thermal Engineering, Second Edition, is a fully updated version of this respected reference work, with chapters written by leading experts. Its first part covers basic concepts, equations and principles of thermodynamics, heat transfer, and fluid dynamics. Following that is detailed coverage of major application areas, such as bioengineering, energy-efficient building systems, traditional and renewable energy sources, food processing, and aerospace heat transfer topics. The latest numerical and computational tools, microscale and nanoscale engineering, and new complex-structured materials are also presented. Designed for easy reference, this new edition is a must-have volume for engineers and researchers around the globe.

Dictionary of Geophysics, Astrophysics, and Astronomy

Author : Richard A. Matzner
Publisher : CRC Press
ISBN 13 : 1420050230
Total Pages : 536 pages
Book Rating : 4.4/5 (2 download)

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Book Synopsis Dictionary of Geophysics, Astrophysics, and Astronomy by : Richard A. Matzner

Download or read book Dictionary of Geophysics, Astrophysics, and Astronomy written by Richard A. Matzner and published by CRC Press. This book was released on 2018-10-08 with total page 536 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Dictionary of Geophysics, Astrophysics, and Astronomy provides a lexicon of terminology covering fields such as astronomy, astrophysics, cosmology, relativity, geophysics, meteorology, Newtonian physics, and oceanography. Authors and editors often assume - incorrectly - that readers are familiar with all the terms in professional literature. With over 4,000 definitions and 50 contributing authors, this unique comprehensive dictionary helps scientists to use terminology correctly and to understand papers, articles, and books in which physics-related terms appear.