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NASA-TM-X-71763

Interim prediction method for fan and compressor source noise

contributor authorNASA - National Aeronautics and Space Administration (NASA)
date accessioned2017-09-04T17:05:44Z
date available2017-09-04T17:05:44Z
date copyright01/01/1975
date issued1975
identifier otherYDDNGEAAAAAAAAAA.pdf
identifier urihttps://yse.yabesh.ir/std/handle/yse/129273
description abstractA method is presented for interim use in assessing the noise generated by fans and compressors in turbojet and turbofan engines. One-third octave band sound pressure levels consisting of broadband, discrete tone, and combination-tone noise components are predicted. Spectral distributions and directivity variations are specified. The method is based on that developed by other investigators with modifications derived from an analysis of full-scale, single-stage fan data. Comparisons of predicted and measured noise performance are presented, and requirements for improving the method are discussed.
languageEnglish
titleNASA-TM-X-71763num
titleInterim prediction method for fan and compressor source noiseen
typestandard
page74
statusActive
treeNASA - National Aeronautics and Space Administration (NASA):;1975
contenttypefulltext
subject keywordsENGINE NOISE
subject keywordsNOISE GENERATORS
subject keywordsNOISE INTENSITY
subject keywordsNOISE SPECTRA
subject keywordsPERFORMANCE PREDICTION
subject keywordsPREDICTION ANALYSIS TECHNIQUES
subject keywordsSOUND PRESSURE
subject keywordsTURBOCOMPRESSORS
subject keywordsTURBOFAN ENGINES
subject keywordsTURBOFANS
subject keywordsTURBOJET ENGINES


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