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ISBN 13 :
Total Pages : 694 pages
Book Rating : 4.F/5 ( download)
Download or read book The Generation and Radiation of Supersonic Jet Noise: Append. 2. Shock associated noise data written by and published by . This book was released on 1972 with total page 694 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 416 pages
Book Rating : 4.:/5 (227 download)
Download or read book The Generation and Radiation of Supersonic Jet Noise. Volume 4. Shock-Associated Noise Data written by and published by . This book was released on 1976 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt: The characteristics of the sound field of shock-containing under- expanded jets are studied by measuring the noise from a two-inch diameter convergent nozzle over an extensive envelope of supercritical jet operating conditions. The measurements, which are accurate and comprehensive, were conducted in the Lockheed anechoic facility. The results are presented in this Volume in a systematic manner in the form of narrowband spectra. The details pertinent to the experimental program and the data presentation format are summarized below. The total noise spectrum from an incorrectly expanded jet flow contains discrete components (or screech) in addition to the basic turbulent mixing noise and the broadband shock-associated noise. In order to study the trends and dependencies of the broadband component accurately, it is vital to keep the contamination by screech to a minimum in the experimental program. In the present experiments, screech suppression was successfully achieved by wrapping all surfaces surrounding the nozzle exit with sound absorbing material, and incorporating a small projection inside the nozzle lip. This projection interrupts the feedback loop between the first shock and the nozzle exit plane, which has been previously proposed and verified as the physical mechanism of screech generation. The detailed calibration tests, conducted prior to the main shock-associated noise experiments, established that all results are essentially uncontaminated by the presence of screech.
Author : Peter A. Lush
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ISBN 13 :
Total Pages : 243 pages
Book Rating : 4.:/5 (227 download)
Download or read book The Generation and Radiation of Supersonic Jet Noise. Volume V - Appendix II. Shock Associated Noise Data written by Peter A. Lush and published by . This book was released on 1972 with total page 243 pages. Available in PDF, EPUB and Kindle. Book excerpt: A series of experiments was conducted for the purpose of clearly isolating and quantifying the noise sources associated with supersonic jet noise and for establishing the effect of refraction on the radiated field of these sources, as well as establishing the range of validity of available theoretical formulas for predicting the radiation field characteristics of these sources. Shock-associated noise, both discrete and broadband, was investigated thoroughly. This Appendix contains sequences of data in the form of narrow band spectra illustrating the existence of these types of shock associated noise in the jet flows investigated. (Author).
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ISBN 13 :
Total Pages : 176 pages
Book Rating : 4.F/5 ( download)
Download or read book The Generation and Radiation of Supersonic Jet Noise: Append. 2. Shock associated noise data written by and published by . This book was released on 1972 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Generation and Radiation of Supersonic Jet Noise: Summary of supersonic jet noise studies written by and published by . This book was released on 1972 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Generation and Radiation of Supersonic Jet Noise: Future studies for definition of supersonic jet noise generation and reduction mechanisms written by and published by . This book was released on 1972 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Lockheed-Georgia Company
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ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (423 download)
Download or read book The Generation and Radiation of Supersonic Jet Noise written by Lockheed-Georgia Company and published by . This book was released on 1976 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : H. K. Tanna
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ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (135 download)
Download or read book The Generation and Radiation of Supersonic Jet Noise written by H. K. Tanna and published by . This book was released on 1976 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The characteristics, both spectral and directivity, of the sound field of supersonic shock-free jets are studied by measuring the turbulent mixing noise in the far field from four two-inch diameter nozzles, namely a convergent nozzle for pressure ratios up to critical and three convergent- divergent nozzles having nominal design Mach numbers of 1.4, 1.7, and 2.0, respectively. The measurements were conducted in a free-field environment. The results from 75 jet exit conditions are presented in a systematic manner in the form of tabulated one-third octave spectra. The test program was carefully planned in order to obtain results (i) at constant jet efflux temperature with varying jet velocity, and conversely (ii) at constant exit velocity while varying jet efflux temperature. The effects of jet velocity and exhaust temperature on turbulent mixing noise can therefore be assessed independently.
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ISBN 13 :
Total Pages : 460 pages
Book Rating : 4.:/5 (227 download)
Download or read book The Generation and Radiation of Supersonic Jet Noise. Volume 2. Studies of Jet Noise, Turbulence Structure and Laser Velocimetry written by and published by . This book was released on 1976 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume discusses (1) turbulent mixing noise tests and observations relative to effects of temperature and Mach number on intensity, directivity, and spectra; (2) numerical solutions of the Lilley theory for sound radiated from point sources simulating small-scale turbulence noise sources, and comparisons of these solutions with experimental data relating to temperature and velocity effects on directivity and spectra; (3) the theory describing the development of the large-scale coherent motion of the jet structure and the far- field noise radiated from this turbulence; (4) a detailed discussion and interpretation of the jet turbulence and mean velocity data; and (5) a comprehensive description of the shock-associated noise tests, a preliminary description of the broadband shock-associated noise model, and a discussion of shock-associated noise in the overall jet noise picture.
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ISBN 13 :
Total Pages : 471 pages
Book Rating : 4.:/5 (227 download)
Download or read book The Generation and Radiation of Supersonic Jet Noise. Volume 3. Turbulent Mixing Noise Data written by and published by . This book was released on 1976 with total page 471 pages. Available in PDF, EPUB and Kindle. Book excerpt: The characteristics, both spectral and directivity, of the sound field of supersonic shock-free jets are studied by measuring the turbulent mixing noise in the far field from four two-inch diameter nozzles, namely a convergent nozzle for pressure ratios up to critical and three convergent- divergent nozzles having nominal design Mach numbers of 1.4, 1.7, and 2.0, respectively. The measurements were conducted in a free-field environment. The results from 75 jet exit conditions are presented in a systematic manner in the form of tabulated one-third octave spectra. The test program was carefully planned in order to obtain results (i) at constant jet efflux temperature with varying jet velocity, and conversely (ii) at constant exit velocity while varying jet efflux temperature. The effects of jet velocity and exhaust temperature on turbulent mixing noise can therefore be assessed independently.
Author :
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ISBN 13 :
Total Pages : 194 pages
Book Rating : 4.F/5 ( download)
Download or read book The Generation and Radiation of Supersonic Jet Noise: Theory of turbulence generated jet noise, noise radiation from upstream sources, and combustion noise written by and published by . This book was released on 1972 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Peter A. Lush
Publisher :
ISBN 13 :
Total Pages : 172 pages
Book Rating : 4.:/5 (227 download)
Download or read book The Generation and Radiation of Supersonic Jet Noise. Volume V. An Experimental Investigation of Jet Noise Variation with Velocity and Temperature written by Peter A. Lush and published by . This book was released on 1972 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: A series of experiments was conducted for the purpose of clearly isolating and quantifying the noise sources associated with supersonic jet noise and for establishing the effect of refraction on the radiated field of these sources, as well as the radiation field characteristics of these sources. Results from the turbulent-mixing tests and the shock-associated tests are appended to this report in separate volumes. The turbulence noise 1/3 octave corrected data appear in Appendix I and the shock-associated narrow-band spectra appear in Appendix 2. (Author).
Author : Harry E. Plumblee
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ISBN 13 :
Total Pages : 46 pages
Book Rating : 4.:/5 (227 download)
Download or read book The Generation and Radiation of Supersonic Jet Noise. Volume II. Future Studies for Definition of Supersonic Jet Noise Generation and Reduction Mechanisms written by Harry E. Plumblee and published by . This book was released on 1972 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report contains a detailed list of proposed recommendations for work necessary to attain the goal of developing technology for significantly reducing supersonic aircraft propulsion system noise. The recommendations and proposed work task are based on the research findings reported in Volume 1 and Volumes 3-6 of this report. Recommendations for experimental and theoretical studies of turbulent-mixing jet noise, shock-associated noise and upstream noise are detailed in the technical plan. Also recommendations for improvements in instrumentation and noise suppression studies are listed. (Author).
Author :
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ISBN 13 :
Total Pages : 509 pages
Book Rating : 4.:/5 (227 download)
Download or read book The Generation, Radiation and Prediction of Supersonic Jet Noise written by and published by . This book was released on 1978 with total page 509 pages. Available in PDF, EPUB and Kindle. Book excerpt: The work presented in this report forms a continuation of the fundamental studies on the generation and radiation of supersonic jet noise, reported in technical reports AFAPL-TR-72-53 (six volumes), AFAPL-TR-74-24, and AFAPL-TR-76-65 (four volumes). The total noise from a supersonic jet is taken to consist of contributions from three independent noise sources: (1) small-scale turbulent mixing noise, (2) noise from large-scale turbulence structure, and (3) shock-associated noise. The generation, radiation and prediction of each of these noise components is described in this report. In addition, the mean and turbulent flow characteristics of heated and unheated, subsonic and supersonic jets, measured by a laser velocimeter system, are also presented. Finally, a computer program for the prediction of jet noise, based on fundamental principles as far as possible at the present time, is presented and described in the form of a user's guide. A complete listing of this computer program is given in the Appendix volume (Volume 11) of this report.
Author : Robert H. Burrin
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ISBN 13 :
Total Pages : 575 pages
Book Rating : 4.:/5 (227 download)
Download or read book The Generation and Radiation of Supersonic Jet Noise. Volume V - Appendix I. Turbulence Mixing Region Noise Data written by Robert H. Burrin and published by . This book was released on 1972 with total page 575 pages. Available in PDF, EPUB and Kindle. Book excerpt: A series of experiments was conducted for the purpose of clearly isolating and quantifying the noise sources associated with supersonic jet noise and for establishing the effect of refraction on the radiated field of these sources, as well as establishing the range of validity of available theoretical formulas for predicting the radiation field characteristics of these sources. Turbulent mixing region noise from a fully expanded supersonic flow exhausting from a well designed convergent-divergent nozzle was measured over a very wide range of operational parameters. This Appendix contains computer printouts obtained from a jet noise data analysis program for turbulent mixing region noise. (Author).
Author : Lockheed-Georgia Company
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ISBN 13 :
Total Pages : 156 pages
Book Rating : 4.F/5 ( download)
Download or read book The Generation and Radiation of Supersonic Jet Noise: Progress toward a unified theory of jet engine noise written by Lockheed-Georgia Company and published by . This book was released on 1972 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Lockheed-Georgia Company
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ISBN 13 :
Total Pages : 322 pages
Book Rating : 4.F/5 ( download)
Download or read book The Generation and Radiation of Supersonic Jet Noise: Jet flow measurement and analysis with special emphasis on remote sensing devices written by Lockheed-Georgia Company and published by . This book was released on 1972 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt:
