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NASA-TN-D-8351

Noise response of cavities of varying dimensions at subsonic speeds

contributor authorNASA - National Aeronautics and Space Administration (NASA)
date accessioned2017-09-04T15:53:56Z
date available2017-09-04T15:53:56Z
date copyright01/01/1976
date issued1976
identifier otherQQYKAEAAAAAAAAAA.pdf
identifier urihttps://yse.yabesh.ir/std/handle/yse/57297
description abstractAn expression for the Strouhal number of lengthwise cavity oscillations is obtained which includes the effect of length-to-depth ratio. This expression, which agrees well with the experimental data, is also used to predict the Mach number at which cavity acoustic response is maximum. Interaction between lengthwise and depthwise modes is seen to occur at Mach numbers from 0.1 to 0.5. Cavity shape is shown to affect the noise spectra in generating either a broadband or narrowband signal.
languageEnglish
titleNASA-TN-D-8351num
titleNoise response of cavities of varying dimensions at subsonic speedsen
typestandard
page36
statusActive
treeNASA - National Aeronautics and Space Administration (NASA):;1976
contenttypefulltext
subject keywordsAERODYNAMIC
subject keywordsAIRFRAMES
subject keywordsCAVITIES
subject keywordsFLOW
subject keywordsGENERATORS
subject keywordsMACH
subject keywordsNOISE
subject keywordsNUMBER
subject keywordsOSCILLATIONS
subject keywordsPRESSURE
subject keywordsSOUND
subject keywordsSPECTRA
subject keywordsSTROUHAL
subject keywordsSUBSONIC


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