Investigation of Far-field and Near-field Jet Noise
Author : Chu-Yung Chen
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Page : 308 pages
File Size : 22,49 MB
Release : 1973
Category :
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Author : Chu-Yung Chen
Publisher :
Page : 308 pages
File Size : 22,49 MB
Release : 1973
Category :
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Author :
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Page : 36 pages
File Size : 12,31 MB
Release : 1975
Category :
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Author : W. C. Sperry
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Page : 150 pages
File Size : 28,22 MB
Release : 1961
Category : Noise
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Author : Paul R. Knott
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Page : 507 pages
File Size : 39,87 MB
Release : 1976
Category :
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This report is an acoustic data report presenting a series of parametric acoustic far-field and near-field results for subsonic and supersonic heated flow conditions for a simple conical nozzle (thin lip and thick lip) and a convergent-divergent nozzle at design and off-design conditions. (Author).
Author :
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Page : 1092 pages
File Size : 10,36 MB
Release : 1977
Category : Astronautics
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Author :
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Page : 786 pages
File Size : 12,51 MB
Release : 1960
Category : Aeronautics
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Author :
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Page : 690 pages
File Size : 46,77 MB
Release : 1973
Category : Weights and measures
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Author : William H. Mayes
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Page : 30 pages
File Size : 27,17 MB
Release : 1961
Category :
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Near-field and far-field noise surveys were made of the supersonic The exhaust jet of the Langley 9- by 6-foot thermal structures tunnel. The jet had a thrust rating of approximately 475,000 pounds. The sound power radiated was found to be about 3.6 x 10(exp 6) watts, and on an acoustical-mechanical efficiency basis this value is in reasonable agreement with data for smaller supersonic jets and for rocket engines of other investigations. Octave-band analyses of the near-field noise show that the maximum sound pressure levels in the low-frequency bands are greatest downstream, whereas maximum sound pressure levels in the high-frequency bands were greatest near the jet exit. A comparison of near-field noise measurements is made with data previously obtained for rocket engines. Noise survey measurements of the original jet are compared with similar data obtained after the addition of a 97-foot-long exit diffuser section, and an example of the application of this facility to the problem of acoustic environmental testing of a large space capsule is cited.
Author : A. E. Potter
Publisher :
Page : 358 pages
File Size : 36,56 MB
Release : 1956
Category : Aerodynamic load
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Author :
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Page : 1126 pages
File Size : 49,94 MB
Release : 1987
Category : Aeronautics
ISBN :
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.