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Prediction of jet noise in flight from static tests

Michalke, Alfons and Michel, Ulf (1979) Prediction of jet noise in flight from static tests. Journal of Sound and Vibration, 67 (3), pp. 341-367. Elsevier.

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Abstract

The sound intensity of jet noise in flight is derived in a co-ordinate system fixed to the jet engine. For this reason a convected form of the Lighthill equation is solved, with special care taken of jet temperature effects. Under certain assumptions and approximations, the in-flight and static sound intensities are related in a simple manner. Thus the directivity of jet noise in flight can be predicted. The theoretical result is checked with measurements. The agreement is remarkably good.

Document Type:Article
Title:Prediction of jet noise in flight from static tests
Authors:
AuthorsInstitution or Email of Authors
Michalke, AlfonsTU Berlin
Michel, UlfUNSPECIFIED
Date:1979
Journal or Publication Title:Journal of Sound and Vibration
Refereed publication:Yes
In ISI Web of Science:Yes
Volume:67
Page Range:pp. 341-367
Publisher:Elsevier
Status:Published
Keywords:Jet noise, flight effects, quadrupole noise, dipole noise, density effects
HGF - Research field:other
HGF - Program:other
HGF - Program Themes:other
DLR - Research area:no assignement
DLR - Program:no assignment
DLR - Research theme (Project):other
Location: other
Institutes and Institutions:Institute of Propulsion Technology > Engine Acoustic > Turbulence Research
Deposited By: Prof. Dr.-Ing. Ulf Michel
Deposited On:05 Jan 2006
Last Modified:14 Jan 2010 20:08

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