Effect of the freestream turbulence scale and the leading edge shape on boundary layer laminar-turbulent transition
| Autor: | M. V. Ustinov, A. A. Uspenskii, S. V. Zhigulev |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
Fluid Flow and Transfer Processes
Physics Leading edge K-epsilon turbulence model Turbulence Mechanical Engineering General Physics and Astronomy Radius Mechanics Nonlinear Sciences::Chaotic Dynamics Physics::Fluid Dynamics Boundary layer Classical mechanics Transition point Physics::Space Physics Laminar-turbulent transition Freestream |
| Zdroj: | Fluid Dynamics. 44:31-44 |
| ISSN: | 1573-8507 0015-4628 |
| DOI: | 10.1134/s0015462809010049 |
| Popis: | The effect of the leading edge shape and the turbulence scale on laminar-turbulent transition in the flat-plate boundary layer due to grid turbulence is investigated. In the experiments, the turbulence scale was changed by a factor of three and the bluntness radius of the edge by a factor of four, all other factors being fixed. It is shown that on the plate with a sharp edge the fluctuation growth rate and the laminar-turbulent transition point depend nonmonotonically on the turbulence scale. On the blunt plate transition occurs considerably earlier than on the sharp plate. |
| Databáze: | OpenAIRE |
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