Computational Analysis Of Propulsion Aeroacoustics For Mixed Flow Nozzle Pylon Installation At Takeoff Nasa
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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 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.
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
Scientific And Technical Aerospace Reports
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Author :
language : en
Publisher:
Release Date : 1983
Scientific And Technical Aerospace Reports written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1983 with Aeronautics categories.
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.
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
International Aerospace Abstracts
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Author :
language : en
Publisher:
Release Date : 1995
International Aerospace Abstracts written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with Aeronautics categories.
Aeronautical Engineering
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Author :
language : en
Publisher:
Release Date : 1993
Aeronautical Engineering 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.
A selection of annotated references to unclassified reports and journal articles that were introduced into the NASA scientific and technical information system and announced in Scientific and technical aerospace reports (STAR) and International aerospace abstracts (IAA).
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.
Monthly Catalog Of United States Government Publications
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Author : United States. Superintendent of Documents
language : en
Publisher:
Release Date : 1993
Monthly Catalog Of United States Government Publications written by United States. Superintendent of Documents and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with Government publications categories.
February issue includes Appendix entitled Directory of United States Government periodicals and subscription publications; September issue includes List of depository libraries; June and December issues include semiannual index