Vortex Body Interaction And Sound Generation In Low Speed Flow

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Vortex/Body Interaction and Sound Generation in Low-Speed Flow

Author : National Aeronautics and Space Administration (NASA)
Publisher : Createspace Independent Publishing Platform
ISBN 13 : 9781722938550
Total Pages : 36 pages
Book Rating : 4.9/5 (385 download)

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Book Synopsis Vortex/Body Interaction and Sound Generation in Low-Speed Flow by : National Aeronautics and Space Administration (NASA)

Download or read book Vortex/Body Interaction and Sound Generation in Low-Speed Flow written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-15 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: The problem of sound generation by vortices interacting with an arbitrary body in a low-speed flow has been investigated by the method of matched asymptotic expansions. For the purpose of this report, it is convenient to divide the problem into three parts. In the first part the mechanism of the vortex/body interaction, which is essentially the inner solution in the inner region, is examined. The trajectories for a system of vortices rotating about their centroid are found to undergo enormous changes after interaction; from this, some interesting properties emerged. In the second part, the problem is formulated, the outer solution is found, matching is implemented, and solutions for acoustic pressure are obtained. In the third part, Fourier integrals are evaluated and predicated results presented. An examination of these results reveals the following: (a) the background noise can be either augmented or attenuated by a body after interaction, (b) sound generated by vortex/body interaction obeys a scaling factor, (C) sound intensity can be reduced substantially by positioning the vortex system in the "favorable" side of the body instead of the "unfavorable" side, and (d) acoustic radiation from vortex/bluff-body interaction is less than that from vortex/airfoil interaction under most circumstances. Kao, Hsiao C. Glenn Research Center RTOP 522-31-23...

Mechanics of Flow-Induced Sound and Vibration, Volume 1

Author : William K. Blake
Publisher : Academic Press
ISBN 13 : 0128122897
Total Pages : 502 pages
Book Rating : 4.1/5 (281 download)

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Book Synopsis Mechanics of Flow-Induced Sound and Vibration, Volume 1 by : William K. Blake

Download or read book Mechanics of Flow-Induced Sound and Vibration, Volume 1 written by William K. Blake and published by Academic Press. This book was released on 2017-06-13 with total page 502 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mechanics of Flow-Induced Sound and Vibration, Volume 1: General Concepts and Elementary Sources, Second Edition, enables readers to fully understand flow-induced vibration and sound, unifying the disciplines of fluid dynamics, structural dynamics, vibration, acoustics, and statistics in order to classify and examine each of the leading sources of vibration and sound induced by various types of fluid motion. Starting with classical theories of aeroacoustics and hydroacoustics, a formalism of integral solutions valid for sources near boundaries is developed and then broadened to address different source types, including jet noise, flow tones, dipole sound from cylinders, and cavitation noise. Step-by-step derivations clearly identify any assumptions made throughout. Each chapter is illustrated with comparisons of leading formulas and measured data. Along with its companion, Mechanics of Flow-Induced Sound and Vibration, Volume 2: Complex Flow-Structure Interactions, the book covers everything an engineer needs to understand flow-induced sound and vibration. This book will be essential reading for postgraduate students, and for engineers and researchers with an interest in aerospace, ships and submarines, offshore structures, construction, and ventilation. Presents every important topic in flow-induced sound and vibration Covers all aspects of the topics addressed, from fundamental theory, to the analytical formulas used in practice Provides the building blocks of computer modeling for flow-induced sound and vibration

Sound-Flow Interactions

Author : Y. Auregan
Publisher : Springer
ISBN 13 : 3540458808
Total Pages : 302 pages
Book Rating : 4.5/5 (44 download)

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Book Synopsis Sound-Flow Interactions by : Y. Auregan

Download or read book Sound-Flow Interactions written by Y. Auregan and published by Springer. This book was released on 2007-06-18 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt: The coupling between acoustic waves and fluid flow motion is basically nonlinear, with the result that flow and sound modify themselves reciprocally with respect to generation and propagation properties. As a result this problem is investigated by many different communities, such as applied mathematics, acoustics and fluid mechanics. This book is the result of an international school which was held to discuss the foundation of sound--flow interactions, to share expertise and methodologies, and to promote cross-fertilization between the different disciplines involved. It consists essentially of a set of pedagogical lectures and is meant to serve not only as a compact source of reference for the experienced researcher but also as an advanced textbook for postgraduate students, and nonspecialists wishing to familiarize themselves in depth, at a research level, with this fascinating subject.

Monthly Catalog of United States Government Publications

Author :
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (891 download)

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Book Synopsis Monthly Catalog of United States Government Publications by :

Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on 1951 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Theory of Vortex Sound

Author : M. S. Howe
Publisher : Cambridge University Press
ISBN 13 : 9780521012232
Total Pages : 236 pages
Book Rating : 4.0/5 (122 download)

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Book Synopsis Theory of Vortex Sound by : M. S. Howe

Download or read book Theory of Vortex Sound written by M. S. Howe and published by Cambridge University Press. This book was released on 2003 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt: Table of contents

Scientific and Technical Aerospace Reports

Author :
Publisher :
ISBN 13 :
Total Pages : 702 pages
Book Rating : 4.:/5 (31 download)

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Book Synopsis Scientific and Technical Aerospace Reports by :

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Boby-Vortex Interaction, Sound Generation and Destructive Interference

Author : National Aeronautics and Space Administration (NASA)
Publisher : Createspace Independent Publishing Platform
ISBN 13 : 9781720404453
Total Pages : 46 pages
Book Rating : 4.4/5 (44 download)

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Book Synopsis Boby-Vortex Interaction, Sound Generation and Destructive Interference by : National Aeronautics and Space Administration (NASA)

Download or read book Boby-Vortex Interaction, Sound Generation and Destructive Interference written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-05-29 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is generally recognized that interaction of vortices with downstream blades is a major source of noise production. To analyze this problem numerically, a two-dimensional model of inviscid flow together with the method of matched asymptotic expansions is proposed. The method of matched asymptotic expansions is used to match the inner region of incompressible flow to the outer region of compressible flow. Because of incompressibility, relatively simple numerical methods are available to treat multiple vortices and multiple bodies of arbitrary shape. Disturbances from vortices and bodies propagate outward as sound waves. Due to their interactions, either constructive or destructive interference may result. When it is destructive, the combined sound intensity can be reduced, sometimes substantially. In addition, an analytical solution to sound generation by the cascade-vonex interaction is given.Kao, Hsiao C.Glenn Research CenterNUMERICAL ANALYSIS; AERODYNAMIC NOISE; TWO DIMENSIONAL MODELS; VORTICES; NOISE REDUCTION; COMPRESSIBLE FLOW; INCOMPRESSIBLE FLOW; SOUND WAVES

Computational Aerodynamics and Aeroacoustics

Author : Tapan K. Sengupta
Publisher : Springer Nature
ISBN 13 : 9811542848
Total Pages : 573 pages
Book Rating : 4.8/5 (115 download)

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Book Synopsis Computational Aerodynamics and Aeroacoustics by : Tapan K. Sengupta

Download or read book Computational Aerodynamics and Aeroacoustics written by Tapan K. Sengupta and published by Springer Nature. This book was released on 2020-05-12 with total page 573 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent advances in scientific computing have caused the field of aerodynamics to change at a rapid pace, simplifying the design cycle of aerospace vehicles enormously – this book takes the readers from core concepts of aerodynamics to recent research, using studies and real-life scenarios to explain problems and their solutions. This book presents in detail the important concepts in computational aerodynamics and aeroacoustics taking readers from the fundamentals of fluid flow and aerodynamics to a more in-depth analysis of acoustic waves, aeroacoustics, computational modelling and processing. This book will be of use to students in multiple branches of engineering, physics and applied mathematics. Additionally, the book can also be used as a text in professional development courses for industry engineers and as a self-help reference for active researchers in both academia and the industry.

Mechanics of Sound Generation in Flows

Author : E.-A. Müller
Publisher : Springer
ISBN 13 :
Total Pages : 328 pages
Book Rating : 4.:/5 (318 download)

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Book Synopsis Mechanics of Sound Generation in Flows by : E.-A. Müller

Download or read book Mechanics of Sound Generation in Flows written by E.-A. Müller and published by Springer. This book was released on 1979-12 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Symposium on "The Mechanics of Sound Generation in FLows" th st was held in Gottingen, Germany, 28 - 31 August 1979, at the joint initiative of the International Union of Theoretical and Applied Mechanics (IUTAM), the International Commission on Acoustics (ICA) and the American Institute of Aeronautics and Astronautics (AIAA). From the whole field of flow-acoustics the Symposium concen trated on prob lems of sound generation, while sound propagation and the creation of flows by sound were left in the ba- ground. 82 delegates from 12 countries attended the Symposium. 38 papers were given 5 of which were invited general lectures. Emphasis was placed on discussion, a plenary discussion closing the sym- sium. A s care had been taken to invite as many active workers in the field as possible with their most recent results the Symposium provided a momentary overview of the current state of the ra pidly developing field of flow-acoustics. Participants appreciated the meeting as a possibility to inform themselves, to discuss their own results and to obtain incentives for future efforts.

Acoustics of Fluid-Structure Interactions

Author : M. S. Howe
Publisher : Cambridge University Press
ISBN 13 : 0521633206
Total Pages : 572 pages
Book Rating : 4.5/5 (216 download)

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Book Synopsis Acoustics of Fluid-Structure Interactions by : M. S. Howe

Download or read book Acoustics of Fluid-Structure Interactions written by M. S. Howe and published by Cambridge University Press. This book was released on 1998-08-13 with total page 572 pages. Available in PDF, EPUB and Kindle. Book excerpt: A reference for analytical methods for modelling acoustic problems, a repository of known results and methods in the theory of aerodynamic sound, and a graduate-level textbook.

Applied Mechanics Reviews

Author :
Publisher :
ISBN 13 :
Total Pages : 540 pages
Book Rating : 4.3/5 (243 download)

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Book Synopsis Applied Mechanics Reviews by :

Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1978 with total page 540 pages. Available in PDF, EPUB and Kindle. Book excerpt:

International Aerospace Abstracts

Author :
Publisher :
ISBN 13 :
Total Pages : 514 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis International Aerospace Abstracts by :

Download or read book International Aerospace Abstracts written by and published by . This book was released on 1996 with total page 514 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Aeronautical Engineering

Author :
Publisher :
ISBN 13 :
Total Pages : 538 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Aeronautical Engineering by :

Download or read book Aeronautical Engineering written by and published by . This book was released on 1991 with total page 538 pages. Available in PDF, EPUB and Kindle. Book excerpt:

AIAA Journal

Author : American Institute of Aeronautics and Astronautics
Publisher :
ISBN 13 :
Total Pages : 990 pages
Book Rating : 4.F/5 ( download)

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Book Synopsis AIAA Journal by : American Institute of Aeronautics and Astronautics

Download or read book AIAA Journal written by American Institute of Aeronautics and Astronautics and published by . This book was released on 2007 with total page 990 pages. Available in PDF, EPUB and Kindle. Book excerpt:

IUTAM Symposium on Dynamics of Slender Vortices

Author : Egon Krause
Publisher : Springer Science & Business Media
ISBN 13 :
Total Pages : 496 pages
Book Rating : 4.F/5 ( download)

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Book Synopsis IUTAM Symposium on Dynamics of Slender Vortices by : Egon Krause

Download or read book IUTAM Symposium on Dynamics of Slender Vortices written by Egon Krause and published by Springer Science & Business Media. This book was released on 1998 with total page 496 pages. Available in PDF, EPUB and Kindle. Book excerpt: This text records the proceedings of the IUTAM Symposium held in Aachen in 1997. It reviews theories based on asymptotic expansions and gives an insight into new computational methods. Some applications of these methods demonstrate their capability, for example the analysis of core structures with axial variation, the description of the interaction of filaments with a solid body and of sound generation by vortex rings, the theoretical approach to the reduction of drag by manipulating vortex structures in shear layers, the numerical simulation of merging vortex rings and of bubble-type vortex breakdown in a tube, and investigations of vortex flows in aircraft and helicopter applications. The articles comprise a wide variety of fundamental investigations and of advanced engineering applications. The book summarizes the state of the art and also communicates recent results of specific flow problems. It addresses the large readership experienced in the field of vortex dynamics.

Acoustic Textiles

Author : Rajiv Padhye
Publisher : Springer
ISBN 13 : 9811014760
Total Pages : 242 pages
Book Rating : 4.8/5 (11 download)

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Book Synopsis Acoustic Textiles by : Rajiv Padhye

Download or read book Acoustic Textiles written by Rajiv Padhye and published by Springer. This book was released on 2016-10-26 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights the manufacturing and applications of acoustic textiles in various industries. It also includes examples from different industries in which acoustic textiles can be used to absorb noise and help reduce the impact of noise at the workplace. Given the importance of noise reduction in the working environment in several industries, the book offers a valuable guide for companies, educators and researchers involved with acoustic materials.

Fluid-Structure-Sound Interactions and Control

Author : Marianna Braza
Publisher : Springer Nature
ISBN 13 : 9813349603
Total Pages : 384 pages
Book Rating : 4.8/5 (133 download)

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Book Synopsis Fluid-Structure-Sound Interactions and Control by : Marianna Braza

Download or read book Fluid-Structure-Sound Interactions and Control written by Marianna Braza and published by Springer Nature. This book was released on 2021-05-05 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains a thorough and unique record of recent advances in the important scientific fields fluid–structure interaction, acoustics and control of priority interest in the academic community and also in an industrial context regarding new engineering designs. It updates advances in these fields by presenting state-of-the-art developments and achievements since the previous Book published by Springer in 2018 after the 4th FSSIC Symposium. This book is unique within the related literature investigating advances in these fields because it addresses them in a complementary way and thereby enhances cross-fertilization between them, whereas other books treat these fields separately.