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Prediction of Flyover Jet Noise Spectra from static Tests

Michel, Ulf and Michalke, Alfons (1981) Prediction of Flyover Jet Noise Spectra from static Tests. Other. NASA TM 83219, 24 S.

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Abstract

A scaling law is derived for predicting the flyover noise spectra of a single-stream shock-free circular jet from static experiments. The theory is based on the Lighthill approach to jet noise. Density terms are retained to include the effect of jet heating. The influence of flight on the turbulent flow field is considered by an experimentally supported similarity assumption. The resulting scaling laws for the difference between one-third-octave spectra and the overall sound pressure level compare vey well with flyover experiments with a jet engine and wind tunnel experiments with a heated model jet.

Item URL in elib:https://elib.dlr.de/20903/
Document Type:Monograph (Other)
Title:Prediction of Flyover Jet Noise Spectra from static Tests
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Michel, UlfUNSPECIFIEDUNSPECIFIED
Michalke, AlfonsTU BerlinUNSPECIFIED
Date:December 1981
Journal or Publication Title:NASA Technical Memoranda
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Number of Pages:24
Status:Published
Keywords:jet noise, aeroacoustics, flight noise effects
HGF - Research field:other
HGF - Program:other
HGF - Program Themes:other
DLR - Research area:no assignment
DLR - Program:no assignment
DLR - Research theme (Project):no assignment
Location: Köln-Porz , other
Institutes and Institutions:Institute of Propulsion Technology > Engine Acoustic > Turbulence Research
Deposited By: Michel, Prof. Dr.-Ing. Ulf
Deposited On:05 Jan 2006
Last Modified:27 Apr 2009 04:50

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