درباره ما
NASA-TN-D-8351
Noise response of cavities of varying dimensions at subsonic speeds
Year: 1976
Abstract: An 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.
Subject: AERODYNAMIC
Show full item record
| contributor author | NASA - National Aeronautics and Space Administration (NASA) | |
| date accessioned | 2017-09-04T15:53:56Z | |
| date available | 2017-09-04T15:53:56Z | |
| date copyright | 01/01/1976 | |
| date issued | 1976 | |
| identifier other | QQYKAEAAAAAAAAAA.pdf | |
| identifier uri | https://yse.yabesh.ir/std/handle/yse/57297 | |
| description abstract | An 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. | |
| language | English | |
| title | NASA-TN-D-8351 | num |
| title | Noise response of cavities of varying dimensions at subsonic speeds | en |
| type | standard | |
| page | 36 | |
| status | Active | |
| tree | NASA - National Aeronautics and Space Administration (NASA):;1976 | |
| contenttype | fulltext | |
| subject keywords | AERODYNAMIC | |
| subject keywords | AIRFRAMES | |
| subject keywords | CAVITIES | |
| subject keywords | FLOW | |
| subject keywords | GENERATORS | |
| subject keywords | MACH | |
| subject keywords | NOISE | |
| subject keywords | NUMBER | |
| subject keywords | OSCILLATIONS | |
| subject keywords | PRESSURE | |
| subject keywords | SOUND | |
| subject keywords | SPECTRA | |
| subject keywords | STROUHAL | |
| subject keywords | SUBSONIC |