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NACA-RM-L51K09
The effect of surface roughness on the performance of a 23 degree conical diffuser at subsonic Mach numbers
Year: 1952
Abstract: An investigation was conducted to determine the effect of surface roughness on the performance of a 23º conical diffuser with a 2:1 ratio of edit to inlet area and with a constant-area tail pipe about 3½ inlet diameters in length. The inlet-boundary-layer thickness was of the order of 5 percent of the inlet diameter. The air flows use in this investigation cover an inlet Mach number range from 0.10 to 0.64, corresponding to Reynolds numbers of 106 to 6 X 106 based on inlet diameter. The surface of the diffuser was coated with cork particles of a controlled size. Incremental bands of roughness were removed from the downstream edge after each series of pressure measurements were made and the variation of diffuser performance with percent of diffuser length roughened thereby determined.
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| contributor author | NASA - National Aeronautics and Space Administration (NASA) | |
| date accessioned | 2017-09-04T18:39:38Z | |
| date available | 2017-09-04T18:39:38Z | |
| date copyright | 01/01/1952 | |
| date issued | 1952 | |
| identifier other | JSONEEAAAAAAAAAA.pdf | |
| identifier uri | http://yse.yabesh.ir/std;query=autho162sAF679D40AC421854DD6EFDEC9FCD/handle/yse/221269 | |
| description abstract | An investigation was conducted to determine the effect of surface roughness on the performance of a 23º conical diffuser with a 2:1 ratio of edit to inlet area and with a constant-area tail pipe about 3½ inlet diameters in length. The inlet-boundary-layer thickness was of the order of 5 percent of the inlet diameter. The air flows use in this investigation cover an inlet Mach number range from 0.10 to 0.64, corresponding to Reynolds numbers of 106 to 6 X 106 based on inlet diameter. The surface of the diffuser was coated with cork particles of a controlled size. Incremental bands of roughness were removed from the downstream edge after each series of pressure measurements were made and the variation of diffuser performance with percent of diffuser length roughened thereby determined. | |
| language | English | |
| title | NACA-RM-L51K09 | num |
| title | The effect of surface roughness on the performance of a 23 degree conical diffuser at subsonic Mach numbers | en |
| type | standard | |
| page | 44 | |
| status | Active | |
| tree | NASA - National Aeronautics and Space Administration (NASA):;1952 | |
| contenttype | fulltext |