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NASA-CR-191413
Simulation of boundary-layer transition: Receptivity to spike stage
Year: 1992
Abstract: The transition to turbulence in a boundary layer over a flat plate with mild surface undulations is simulated using the parabolized stability equations (PSE). The simulations incorporate the receptivity, the linear growth, and the nonlinear interactions leading to breakdown. The nonlocalized receptivity couples acoustic perturbations in the free stream with disturbances generated by the surface undulations to activate a resonance with the natural eigenmodes of the boundary layer. The nonlinear simulations display the influence of the receptivity inputs on transition. Results show the transition location to be highly sensitive to the amplitudes of both the acoustic disturbance and the surface waviness.
Subject: BOUNDARY LAYER TRANSITION
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| contributor author | NASA - National Aeronautics and Space Administration (NASA) | |
| date accessioned | 2017-09-04T15:28:23Z | |
| date available | 2017-09-04T15:28:23Z | |
| date copyright | 01/01/1992 | |
| date issued | 1992 | |
| identifier other | NUHOEEAAAAAAAAAA.pdf | |
| identifier uri | https://yse.yabesh.ir/std/handle/yse/29451 | |
| description abstract | The transition to turbulence in a boundary layer over a flat plate with mild surface undulations is simulated using the parabolized stability equations (PSE). The simulations incorporate the receptivity, the linear growth, and the nonlinear interactions leading to breakdown. The nonlocalized receptivity couples acoustic perturbations in the free stream with disturbances generated by the surface undulations to activate a resonance with the natural eigenmodes of the boundary layer. The nonlinear simulations display the influence of the receptivity inputs on transition. Results show the transition location to be highly sensitive to the amplitudes of both the acoustic disturbance and the surface waviness. | |
| language | English | |
| title | NASA-CR-191413 | num |
| title | Simulation of boundary-layer transition: Receptivity to spike stage | en |
| type | standard | |
| page | 26 | |
| status | Active | |
| tree | NASA - National Aeronautics and Space Administration (NASA):;1992 | |
| contenttype | fulltext | |
| subject keywords | BOUNDARY LAYER TRANSITION | |
| subject keywords | COMPUTATIONAL FLUID DYNAMICS | |
| subject keywords | FLAT PLATES | |
| subject keywords | PERTURBATION | |
| subject keywords | RIBLETS | |
| subject keywords | SIMULATION | |
| subject keywords | SOUND FIELDS | |
| subject keywords | SURFACE ROUGHNESS | |
| subject keywords | TURBULENCE |