Computational Analyses Of Propulsion Aeroacoustics For Mixed Flow Nozzle Pylon Installation At Takeoff
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Computational Analyses Of Propulsion Aeroacoustics For Mixed Flow Nozzle Pylon Installation At Takeoff
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Author : Steven James Massey
language : en
Publisher:
Release Date : 2001
Computational Analyses Of Propulsion Aeroacoustics For Mixed Flow Nozzle Pylon Installation At Takeoff written by Steven James Massey and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with categories.
Computational Analyses Of Propulsion Aeroacoustics For Mixed Flow Nozzle Pylon Installation At Takeoff
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Author : National Aeronautics and Space Administration (NASA)
language : en
Publisher: Createspace Independent Publishing Platform
Release Date : 2018-05-29
Computational Analyses Of Propulsion Aeroacoustics For Mixed Flow Nozzle Pylon Installation At Takeoff written by National Aeronautics and Space Administration (NASA) and has been published by Createspace Independent Publishing Platform this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-05-29 with categories.
A CFD analyses is presented for a set of baseline and noise suppression mixed flow nozzles with and without a pylon installation. The five model configurations are as follows; a baselinecore/fan dual-stream nozzle with an external plug, a chevron mixer nozzle with a peak on the symmetry plane with external plug, both of the above nozzles with an installed bifurcatingpylon and lastly a clocked chevron mixer nozzle such that a trough is aligned with the center of the pylon. The fluid flow is simulated by solving the asymptotically steady, compressible, Reynolds-averaged Navier-Stokes equations using an implicit, up-wind, flux-difference splitting finite volume scheme and standard two equation k-epsilon turbulence model with a linear stress representation. All computations are performed using the multiblock, parallel, structuredcode PAB3D. Results indicate that the clocked chevron with pylon case achieves the most optimal levels of average and peak turbulence kinetic energy and vorticity and therefore is expected to be the quietest of the five configurations tested. Further study is required to refine expressions which are indicative of noise and mate these with rigorous noise prediction models.Massey, Steven J. and Waithe, Kenrich A.Langley Research CenterCOMPUTATIONAL FLUID DYNAMICS; PLUG NOZZLES; AEROACOUSTICS; ANALYSIS (MATHEMATICS); FINITE VOLUME METHOD; FLUX DIFFERENCE SPLITTING; NOISE PREDICTION; TAKEOFF; NAVIER-STOKES EQUATION; NOISE REDUCTION; TURBULENCE; REYNOLDS EQUATION
Computational Analysis Of Propulsion Aeroacoustics For Mixed Flow Nozzle Pylon Installation At Takeoff Nasa
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Author : United States. National Aeronautics and Space Administration
language : en
Publisher:
Release Date : 2002*
Computational Analysis Of Propulsion Aeroacoustics For Mixed Flow Nozzle Pylon Installation At Takeoff Nasa written by United States. National Aeronautics and Space Administration and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002* with categories.
Nasa Langley Scientific And Technical Information Output 2001
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Author :
language : en
Publisher:
Release Date : 2002
Nasa Langley Scientific And Technical Information Output 2001 written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with categories.
Wind Turbine Noise
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Author : Siegfried Wagner
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Wind Turbine Noise written by Siegfried Wagner and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Technology & Engineering categories.
Over the last five years an enormous number of wind turbines have been installed in Europe, bringing wind energy into public awareness. However, its further development is restricted mainly by public complaints caused by visual impact and noise. The European Commission has therefore funded a number of research projects in the field of wind turbine noise within the JOULE program. This book presents the most relevant results of these projects. The book addresses all relevant aspects of wind turbine noise, namely: noise reduction, noise propagation, noise measurement, and an introduction to aeroacoustics. It may serve as a first reference in the field of wind turbine noise for researchers, planners, and manufacturers.
Aircraft Design
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Author : Daniel P. Raymer
language : en
Publisher: AIAA (American Institute of Aeronautics & Astronautics)
Release Date : 2006
Aircraft Design written by Daniel P. Raymer and has been published by AIAA (American Institute of Aeronautics & Astronautics) this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with Airplanes categories.
Winner of the Summerfield Book Award Winner of the Aviation-Space Writers Association Award of Excellence. --Over 30,000 copies sold, consistently the top-selling AIAA textbook title This highly regarded textbook presents the entire process of aircraft conceptual designfrom requirements definition to initial sizing, configuration layout, analysis, sizing, and trade studiesin the same manner seen in industry aircraft design groups. Interesting and easy to read, the book has more than 800 pages of design methods, illustrations, tips, explanations, and equations, and extensive appendices with key data essential to design. It is the required design text at numerous universities around the world, and is a favorite of practicing design engineers.
Aeroacoustic Measurements
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Author : Thomas J. Mueller
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-11-27
Aeroacoustic Measurements written by Thomas J. Mueller and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-11-27 with Technology & Engineering categories.
During the past three decades, there has been a growing concern over the in crease in noise pollution that comes as a direct result of the increased volume of automobile traffic, high-speed trains, and larger aircraft. Additional sources of noise are commonly found in air handling equipment (such as fans and pro pellers) and a variety of machinery used in construction and manufacturing. A vast majority of these noise sources are the result of a given system's aero acoustic response, or sound generated by the interaction of a flow field with the given structure. While barriers are commonly used to shield communities from highway and train noise, and absorption materials are used to shield machinery noise, there is no way to shield communities near major airports from the noise gen erated by low-flying aircraft. Tens of millions of people worldwide are affected by this airport noise problem. In densely populated Europe, up to 15 % of the total population is strongly influenced by airport noise. Since the volume of air traffic will continue to grow, so too will the problem and the number of people involved. It is not surprising that many countries and communities have taken legal action to preserve the quality of life in these areas. As a result, the airlines, airports, manufacturers and governments are working together to set new standards for aircraft noise reduction. In order to establish realistic goals, the generation and propagation of acoustic sources must be better understood.
The Power For Flight
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Author : Jeremy R. Kinney
language : en
Publisher: Government Printing Office
Release Date : 2018-02-15
The Power For Flight written by Jeremy R. Kinney and has been published by Government Printing Office this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-02-15 with Science categories.
The NACA and aircraft propulsion, 1915-1958 -- NASA gets to work, 1958-1975 -- The shift toward commercial aviation, 1966-1975 -- The quest for propulsive efficiency, 1976-1989 -- Propulsion control enters the computer era, 1976-1998 -- Transiting to a new century, 1990-2008 -- Toward the future
Elements Of Gas Turbine Propulsion
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Author : Jack D. Mattingly
language : en
Publisher: AIAA (American Institute of Aeronautics & Astronautics)
Release Date : 2005
Elements Of Gas Turbine Propulsion written by Jack D. Mattingly and has been published by AIAA (American Institute of Aeronautics & Astronautics) this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with Aircraft gas-turbines categories.
This text provides an introduction to gas turbine engines and jet propulsion for aerospace or mechanical engineers. The text is divided into four parts: introduction to aircraft propulsion; basic concepts and one-dimensional/gas dynamics; parametric (design point) and performance (off-design) analysis of air breathing propulsion systems; and analysis and design of major gas turbine engine components (fans, compressors, turbines, inlets, nozzles, main burners, and afterburners). Design concepts are introduced early (aircraft performance in introductory chapter) and integrated throughout. Written with extensive student input on the design of the book, the book builds upon definitions and gradually develops the thermodynamics, gas dynamics, and gas turbine engine principles.
Nasa Sp
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Author :
language : en
Publisher:
Release Date : 1993
Nasa Sp written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with Aeronautics categories.