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NACA-TR-1150
Considerations on the effect of wind-tunnel walls on oscillating air forces for two-dimensional subsonic compressible flow
Year: 1953
Abstract: This report treats the effect of wind-tunnel walls on the oscillating two-dimensional air forces in a compressible medium. The walls are simulated by the usual method of placing images at appropriate distances above and below the wing. An important result shown is that, for certain conditions of wing frequency, tunnel height, and Mach number, the tunnel and wing may form a resonant system so that the forces on the wing are greatly changed from the condition of no tunnel walls. It is pointed out that similar conditions exist for three-dimensional flow in circular and rectangular tunnels and apparently, within certain Mach number ranges, in tunnels of nonuniform cross section or even in open tunnels or jets.
Subject: ACOUSTIC
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| contributor author | NASA - National Aeronautics and Space Administration (NASA) | |
| date accessioned | 2017-09-04T17:15:40Z | |
| date available | 2017-09-04T17:15:40Z | |
| date copyright | 01/01/1953 | |
| date issued | 1953 | |
| identifier other | ZDRXYDAAAAAAAAAA.pdf | |
| identifier uri | http://yse.yabesh.ir/std/handle/yse/139066 | |
| description abstract | This report treats the effect of wind-tunnel walls on the oscillating two-dimensional air forces in a compressible medium. The walls are simulated by the usual method of placing images at appropriate distances above and below the wing. An important result shown is that, for certain conditions of wing frequency, tunnel height, and Mach number, the tunnel and wing may form a resonant system so that the forces on the wing are greatly changed from the condition of no tunnel walls. It is pointed out that similar conditions exist for three-dimensional flow in circular and rectangular tunnels and apparently, within certain Mach number ranges, in tunnels of nonuniform cross section or even in open tunnels or jets. | |
| language | English | |
| title | NACA-TR-1150 | num |
| title | Considerations on the effect of wind-tunnel walls on oscillating air forces for two-dimensional subsonic compressible flow | en |
| type | standard | |
| page | 10 | |
| status | Active | |
| tree | NASA - National Aeronautics and Space Administration (NASA):;1953 | |
| contenttype | fulltext | |
| subject keywords | ACOUSTIC | |
| subject keywords | AIRFOILS | |
| subject keywords | BOUNDARY | |
| subject keywords | COMPUTATIONAL | |
| subject keywords | DYNAMICS | |
| subject keywords | EQUATIONS | |
| subject keywords | FLOW | |
| subject keywords | FLUID | |
| subject keywords | FLUTTER | |
| subject keywords | INTERFERENCE | |
| subject keywords | PERTURBATION | |
| subject keywords | PROBLEMS | |
| subject keywords | PROPERTIES | |
| subject keywords | TESTS | |
| subject keywords | TUNNEL | |
| subject keywords | VALUE | |
| subject keywords | WALL | |
| subject keywords | WALLS | |
| subject keywords | WAVE | |
| subject keywords | WIND |