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NACA-WR-L-23
Variation with Mach number of static and total pressures through various screens
Year: 1946
Abstract: Tests were conducted in the Langley 24-inch high-speed tunnel to ascertain the static-pressure and total-pressure losses through screens ranging in mesh from 3 to 12 wires per inch and in wire diameter from 0.023 to 0.041 inch. Data were obtained from a Mach number of approximately 0.20 up to the maximum (choking) Mach number obtainable for each screen.
The results of this investigation indicate that the pressure losses increase with increasing Mach number until the choking Mach number until the choking Mach number, which can be computed, is reached. Since choking imposes a restriction on the mass rate of flow and maximum losses are incurred at this condition, great care must be taken in selecting the screen mesh and wire diameter for an installation so that the choking Mach number is not approached at the maximum operating velocity.
The results of this investigation indicate that the pressure losses increase with increasing Mach number until the choking Mach number until the choking Mach number, which can be computed, is reached. Since choking imposes a restriction on the mass rate of flow and maximum losses are incurred at this condition, great care must be taken in selecting the screen mesh and wire diameter for an installation so that the choking Mach number is not approached at the maximum operating velocity.
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| contributor author | NASA - National Aeronautics and Space Administration (NASA) | |
| date accessioned | 2017-09-04T18:18:03Z | |
| date available | 2017-09-04T18:18:03Z | |
| date copyright | 01/01/1946 | |
| date issued | 1946 | |
| identifier other | HQONEEAAAAAAAAAA.pdf | |
| identifier uri | http://yse.yabesh.ir/std;jsery=autho162s7D8308/handle/yse/200800 | |
| description abstract | Tests were conducted in the Langley 24-inch high-speed tunnel to ascertain the static-pressure and total-pressure losses through screens ranging in mesh from 3 to 12 wires per inch and in wire diameter from 0.023 to 0.041 inch. Data were obtained from a Mach number of approximately 0.20 up to the maximum (choking) Mach number obtainable for each screen. The results of this investigation indicate that the pressure losses increase with increasing Mach number until the choking Mach number until the choking Mach number, which can be computed, is reached. Since choking imposes a restriction on the mass rate of flow and maximum losses are incurred at this condition, great care must be taken in selecting the screen mesh and wire diameter for an installation so that the choking Mach number is not approached at the maximum operating velocity. | |
| language | English | |
| title | NACA-WR-L-23 | num |
| title | Variation with Mach number of static and total pressures through various screens | en |
| type | standard | |
| page | 28 | |
| status | Active | |
| tree | NASA - National Aeronautics and Space Administration (NASA):;1946 | |
| contenttype | fulltext |