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Aeroacoustics of Low Mach Number Flows

Aeroacoustics of Low Mach Number Flows
  • Author : Stewart Glegg,William Devenport
  • Publisher :Unknown
  • Release Date :2017-02-15
  • Total pages :552
  • ISBN : 9780128097939
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Summary : Aeroacoustics of Low Mach Number Flows: Fundamentals, Analysis, and Measurement provides a comprehensive treatment of sound radiation from subsonic flow over moving surfaces, which is the most widespread cause of flow noise in engineering systems. This includes fan noise, rotor noise, wind turbine noise, boundary layer noise, and aircraft noise. Beginning with fluid dynamics, the fundamental equations of aeroacoustics are derived and the key methods of solution are explained, focusing both on the necessary mathematics and physics. Fundamentals of turbulence and turbulent flows, experimental methods and numerous applications are also covered. The book is an ideal source of information on aeroacoustics for researchers and graduate students in engineering, physics, or applied math, as well as for engineers working in this field. Supplementary material for this book is provided by the authors on the website www.aeroacoustics.net. The website provides educational content designed to help students and researchers in understanding some of the principles and applications of aeroacoustics, and includes example problems, data, sample codes, course plans and errata. The website is continuously being reviewed and added to. Explains the key theoretical tools of aeroacoustics, from Lighthill’s analogy to the Ffowcs Williams and Hawkings equation Provides detailed coverage of sound from lifting surfaces, boundary layers, rotating blades, ducted fans and more Presents the fundamentals of sound measurement and aeroacoustic wind tunnel testing

Computational Aeroacoustics

Computational Aeroacoustics
  • Author : Jay C. Hardin,M.Y. Hussaini
  • Publisher :Unknown
  • Release Date :2012-12-06
  • Total pages :513
  • ISBN : 9781461383420
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Summary : Computational aeroacoustics is rapidly emerging as an essential element in the study of aerodynamic sound. As with all emerging technologies, it is paramount that we assess the various opportuni ties and establish achievable goals for this new technology. Essential to this process is the identification and prioritization of fundamental aeroacoustics problems which are amenable to direct numerical siIn ulation. Questions, ranging from the role numerical methods play in the classical theoretical approaches to aeroacoustics, to the correct specification of well-posed numerical problems, need to be answered. These issues provided the impetus for the Workshop on Computa tional Aeroacoustics sponsored by ICASE and the Acoustics Division of NASA LaRC on April 6-9, 1992. The participants of the Work shop were leading aeroacousticians, computational fluid dynamicists and applied mathematicians. The Workshop started with the open ing remarks by M. Y. Hussaini and the welcome address by Kristin Hessenius who introduced the keynote speaker, Sir James Lighthill. The keynote address set the stage for the Workshop. It was both an authoritative and up-to-date discussion of the state-of-the-art in aeroacoustics. The presentations at the Workshop were divided into five sessions - i) Classical Theoretical Approaches (William Zorumski, Chairman), ii) Mathematical Aspects of Acoustics (Rodolfo Rosales, Chairman), iii) Validation Methodology (Allan Pierce, Chairman), iv) Direct Numerical Simulation (Michael Myers, Chairman), and v) Unsteady Compressible Flow Computa tional Methods (Douglas Dwoyer, Chairman).

Topics in Hyposonic Flow Theory

Topics in Hyposonic Flow Theory
  • Author : Radyadour Kh. Zeytounian
  • Publisher :Unknown
  • Release Date :2005-12-20
  • Total pages :286
  • ISBN : 3540255494
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Summary : Hyposonic fluid flows, characterized by a low Mach number, are mainly linked with geophysical and environmental fluid flows. In addition they are relevant to engineers because of their connection with aerodynamics. The books brings together insights derived from mathematically rigorous results and combines them with a number of realistic fluid flow situations. Asymptotic analytic solutions for the low-Mach number cases are developed to provide both insights into the underlying physics as well as benchmarks for numerical computations.

Aeroacoustic Noise Generation for Low Mach Number Turbulent Flow

Aeroacoustic Noise Generation for Low Mach Number Turbulent Flow
  • Author : Federico Mattia Visconti
  • Publisher :Unknown
  • Release Date :2007
  • Total pages :229
  • ISBN : OCLC:1045994030
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Summary :

Joint Meeting of the U.S. Sections of the Combustion Institute, Western States, Central States, Eastern States

Joint Meeting of the U.S. Sections of the Combustion Institute, Western States, Central States, Eastern States
  • Author : Anonim
  • Publisher :Unknown
  • Release Date :1999
  • Total pages :229
  • ISBN : CORNELL:31924077876096
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Summary :

Hyperbolic Partial Differential Equations

Hyperbolic Partial Differential Equations
  • Author : Andreas Meister,Jens Struckmeier
  • Publisher :Unknown
  • Release Date :2012-12-06
  • Total pages :320
  • ISBN : 9783322802279
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Summary : The book gives an introduction to the fundamental properties of hyperbolic partial differential equations und their appearance in the mathematical modelling of various problems from practice. It shows in an unique manner concepts for the numerical treatment of such equations starting from basic algorithms up actual research topics in this area. The numerical methods discussed are central and upwind schemes for structured and unstructured grids based on ENO and WENO reconstructions, pressure correction schemes like SIMPLE and PISO as well as asymptotic-induced algorithms for low-Mach number flows.

Second Computational Aeroacoustics (CAA) Workshop on Benchmark Problems

Second Computational Aeroacoustics (CAA) Workshop on Benchmark Problems
  • Author : C. K. W. Tam,Jay C. Hardin
  • Publisher :Unknown
  • Release Date :1997
  • Total pages :380
  • ISBN : NASA:31769000471824
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Summary :

Aeroacoustics of Flight Vehicles

Aeroacoustics of Flight Vehicles
  • Author : Harvey H. Hubbard
  • Publisher :Unknown
  • Release Date :1991
  • Total pages :229
  • ISBN : STANFORD:36105024722329
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Summary :

Floating, Flowing, Flying

Floating, Flowing, Flying
  • Author : D. Dijkstra,Marek Kierstan,Hans Kuerten,H.K. Kuiken
  • Publisher :Unknown
  • Release Date :2013-04-17
  • Total pages :253
  • ISBN : 9789401715645
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Summary : This book is dedicated to Pieter J. Zandbergen on the occasion of his sixty-fifth birthday. It contains fourteen original contributions written by specialized authors and deals with the application of mathematics and numerical analysis to a wide variety of problems in fluid dynamics and related fields. At present the research field of computational fluid dynamics is growing strongly and the book is therefore of interest to applied mathematicians, theoretical physicists and engineers.

Computational Engineering - Introduction to Numerical Methods

Computational Engineering - Introduction to Numerical Methods
  • Author : Michael Schäfer
  • Publisher :Unknown
  • Release Date :2006-05-01
  • Total pages :321
  • ISBN : 9783540306863
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Summary : This book is an introduction to modern numerical methods in engineering. It covers applications in fluid mechanics, structural mechanics, and heat transfer as the most relevant fields for engineering disciplines such as computational engineering, scientific computing, mechanical engineering as well as chemical and civil engineering. The content covers all aspects in the interdisciplinary field which are essential for an ''up-to-date'' engineer.

Numerical Simulation of Turbulent Flows and Noise Generation

Numerical Simulation of Turbulent Flows and Noise Generation
  • Author : Christophe Brun,Daniel Juvé,Michael Manhart,Claus-Dieter Munz
  • Publisher :Unknown
  • Release Date :2009-03-07
  • Total pages :342
  • ISBN : 9783540899563
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Summary : Large Eddy Simulation (LES) is a high-fidelity approach to the numerical simulation of turbulent flows. Recent developments have shown LES to be able to predict aerodynamic noise generation and propagation as well as the turbulent flow, by means of either a hybrid or a direct approach. This book is based on the results of two French/German research groups working on LES simulations in complex geometries and noise generation in turbulent flows. The results provide insights into modern prediction approaches for turbulent flows and noise generation mechanisms as well as their use for novel noise reduction concepts.

Theory of Vortex Sound

Theory of Vortex Sound
  • Author : M. S. Howe
  • Publisher :Unknown
  • Release Date :2003
  • Total pages :216
  • ISBN : 0521012236
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Summary : Table of contents

Discrete and Continuous Dynamical Systems

Discrete and Continuous Dynamical Systems
  • Author : Anonim
  • Publisher :Unknown
  • Release Date :2008
  • Total pages :229
  • ISBN : UOM:39015072642989
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Summary :

Combustion Noise

Combustion Noise
  • Author : Anna Schwarz,Johannes Janicka
  • Publisher :Unknown
  • Release Date :2009-06-17
  • Total pages :291
  • ISBN : 9783642020384
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Summary : November, 2008 Anna Schwarz, Johannes Janicka In the last thirty years noise emission has developed into a topic of increasing importance to society and economy. In ?elds such as air, road and rail traf?c, the control of noise emissions and development of associated noise-reduction techno- gies is a central requirement for social acceptance and economical competitiveness. The noise emission of combustion systems is a major part of the task of noise - duction. The following aspects motivate research: • Modern combustion chambers in technical combustion systems with low pol- tion exhausts are 5 - 8 dB louder compared to their predecessors. In the ope- tional state the noise pressure levels achieved can even be 10-15 dB louder. • High capacity torches in the chemical industry are usually placed at ground level because of the reasons of noise emissions instead of being placed at a height suitable for safety and security. • For airplanes the combustion emissions become a more and more important topic. The combustion instability and noise issues are one major obstacle for the introduction of green technologies as lean fuel combustion and premixed burners in aero-engines. The direct and indirect contribution of combustion noise to the overall core noise is still under discussion. However, it is clear that the core noise besides the fan tone will become an important noise source in future aero-engine designs. To further reduce the jet noise, geared ultra high bypass ratio fans are driven by only a few highly loaded turbine stages.

Mathematical Reviews

Mathematical Reviews
  • Author : Anonim
  • Publisher :Unknown
  • Release Date :2003
  • Total pages :229
  • ISBN : UVA:X006180443
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Summary :

Computational Fluid Dynamics: Principles and Applications

Computational Fluid Dynamics: Principles and Applications
  • Author : Jiri Blazek
  • Publisher :Unknown
  • Release Date :2005-12-20
  • Total pages :496
  • ISBN : 0080529674
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Summary : Computational Fluid Dynamics (CFD) is an important design tool in engineering and also a substantial research tool in various physical sciences as well as in biology. The objective of this book is to provide university students with a solid foundation for understanding the numerical methods employed in today’s CFD and to familiarise them with modern CFD codes by hands-on experience. It is also intended for engineers and scientists starting to work in the field of CFD or for those who apply CFD codes. Due to the detailed index, the text can serve as a reference handbook too. Each chapter includes an extensive bibliography, which provides an excellent basis for further studies.

Numerical Simulations in Engineering and Science

Numerical Simulations in Engineering and Science
  • Author : Srinivasa Rao
  • Publisher :Unknown
  • Release Date :2018-07-11
  • Total pages :404
  • ISBN : 9781789234503
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Summary : Computational science is one of the rapidly growing multidisciplinary fields. The high-performance computing capabilities are utilized to solve and understand complex problems. This book offers a detailed exposition of the numerical methods that are used in engineering and science. The chapters are arranged in such a way that the readers will be able to select the topics appropriate to their interest and need. The text features a broad array of applications of computational methods to science and technology. This book would be an interesting supplement for the practicing engineers, scientists, and graduate students.

Combustion Noise

Combustion Noise
  • Author : Anna Schwarz,Johannes Janicka
  • Publisher :Unknown
  • Release Date :2009-06-17
  • Total pages :291
  • ISBN : 9783642020384
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Summary : November, 2008 Anna Schwarz, Johannes Janicka In the last thirty years noise emission has developed into a topic of increasing importance to society and economy. In ?elds such as air, road and rail traf?c, the control of noise emissions and development of associated noise-reduction techno- gies is a central requirement for social acceptance and economical competitiveness. The noise emission of combustion systems is a major part of the task of noise - duction. The following aspects motivate research: • Modern combustion chambers in technical combustion systems with low pol- tion exhausts are 5 - 8 dB louder compared to their predecessors. In the ope- tional state the noise pressure levels achieved can even be 10-15 dB louder. • High capacity torches in the chemical industry are usually placed at ground level because of the reasons of noise emissions instead of being placed at a height suitable for safety and security. • For airplanes the combustion emissions become a more and more important topic. The combustion instability and noise issues are one major obstacle for the introduction of green technologies as lean fuel combustion and premixed burners in aero-engines. The direct and indirect contribution of combustion noise to the overall core noise is still under discussion. However, it is clear that the core noise besides the fan tone will become an important noise source in future aero-engine designs. To further reduce the jet noise, geared ultra high bypass ratio fans are driven by only a few highly loaded turbine stages.

Flow Noise Modeling, Measurement, and Control

Flow Noise Modeling, Measurement, and Control
  • Author : Anonim
  • Publisher :Unknown
  • Release Date :1995
  • Total pages :229
  • ISBN : UOM:39015036295213
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Summary :

Proceedings of the 5th International Symposium on Fluid-Structure Interaction, Aeroelasticity, Flow-Induced Vibration and Noise

Proceedings of the 5th International Symposium on Fluid-Structure Interaction, Aeroelasticity, Flow-Induced Vibration and Noise
  • Author : M. P. Paidoussis
  • Publisher :Unknown
  • Release Date :2002
  • Total pages :229
  • ISBN : CORNELL:31924088783844
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Summary :

Formulas of Acoustics

Formulas of Acoustics
  • Author : F.P. Mechel
  • Publisher :Unknown
  • Release Date :2013-06-29
  • Total pages :1167
  • ISBN : 9783662072967
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Summary : This application-orientated collection of formulas has been written by applied scientists and industrial engineers for design professionals and students who work in engineering acoustics. It is subdivided into the most important fields of applied acoustics, each dealing with a well-defined type of problem. It provides easy and rapid access to profound and comprehensive information. In order to keep the text as concise as possible, the derivation of a formula is described as briefly as possible and the reader is referred to the original source. Besides the formulas, useful principles and computational procedures are given.