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NASA-TM-X-71763
Interim prediction method for fan and compressor source noise
Year: 1975
Abstract: A 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.
Subject: ENGINE NOISE
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NASA-TM-X-71763
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| contributor author | NASA - National Aeronautics and Space Administration (NASA) | |
| date accessioned | 2017-09-04T17:05:44Z | |
| date available | 2017-09-04T17:05:44Z | |
| date copyright | 01/01/1975 | |
| date issued | 1975 | |
| identifier other | YDDNGEAAAAAAAAAA.pdf | |
| identifier uri | https://yse.yabesh.ir/std/handle/yse/129273 | |
| description abstract | A 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. | |
| language | English | |
| title | NASA-TM-X-71763 | num |
| title | Interim prediction method for fan and compressor source noise | en |
| type | standard | |
| page | 74 | |
| status | Active | |
| tree | NASA - National Aeronautics and Space Administration (NASA):;1975 | |
| contenttype | fulltext | |
| subject keywords | ENGINE NOISE | |
| subject keywords | NOISE GENERATORS | |
| subject keywords | NOISE INTENSITY | |
| subject keywords | NOISE SPECTRA | |
| subject keywords | PERFORMANCE PREDICTION | |
| subject keywords | PREDICTION ANALYSIS TECHNIQUES | |
| subject keywords | SOUND PRESSURE | |
| subject keywords | TURBOCOMPRESSORS | |
| subject keywords | TURBOFAN ENGINES | |
| subject keywords | TURBOFANS | |
| subject keywords | TURBOJET ENGINES |