The Generation and Radiation of Supersonic Jet Noise. Volume III. Progress Toward a Unified Theory of Jet Engine Noise.

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Abstract:

Existing theories of aerodynamic noise generation are critically reviewed with special emphasis on conceptual adequacy and physical scope with special reference to supersonic jet noise. In this review the basic work of Stokes, Kirchoff and Rayleigh on fluctuating motions in fluids is recalled and developed to provide a firm basis for the critique. The advantages and disadvantages of acoustic analogy theories such as Lighthills are thoroughly discussed in Section 11.3. A contribution is made towards removing the criticisms made by Lighthill of Ribners isotropic source tensor theory. New developments such as those by Crow, Lilley and Doak are emphasized. On the basis of the evidence provided by the critical review, a new unified theory for jet noise has been devised. Author

Author(s):
Doak, Philip E.
Author Organization(s):
LOCKHEED-GEORGIA CO MARIETTA
Descriptive Note:
Final technical rept. 1 May 71-31 May 72,
Supplementary Note:
See also Volume 4, AD-749 139, and Volume 2, AD-749 137.
Pagination:
0151

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
AFAPL-TR-72-53-Vol-3
Contract/Grant Number(s):
F33615-71-C-1663
Task Number(s):
306614
Project Number(s):
AF-3066
Monitor Series:
TR-72-53-Vol-3
 Subject Terms
Communities of Interest:
No COI(s) Identified
Descriptor(s):
*JET ENGINE NOISE, *SUPERSONIC AIRCRAFT, *JET AIRCRAFT NOISE, ACOUSTIC PROPERTIES, ACOUSTICS, AERODYNAMIC NOISE, SOUND TRANSMISSION, GAS TURBINE NOZZLES, AFTERBURNING, JET MIXING FLOW, COMBUSTION, LASERS, INTERFEROMETERS
Field(s)/Group(s):
Aircraft, Acoustics, Jet and Gas Turbine Engines
Keyword(s):
NEAR FIELD NOISE, *NOISE REDUCTION, ACOUSTIC MEASUREMENT, ACOUSTIC FIELDS, HOLOGRAPHY, *JET PLANE NOISE, *SUPERSONIC AIRCRAFT, FAR FIELD NOISE
Report Date:
1972 Jul 01