Joint permeability and roughness effect on the supersonic flat-plate boundary layer stability and transition. (English. Russian original) Zbl 1302.76067
Fluid Dyn. 49, No. 5, 608-613 (2014); translation from Izv. Ross. Akad. Nauk, Mekh. Zhidk. Gaza 2014, No. 5, 52-59 (2014).
Summary: The joint effect of the permeability and the roughness of the flat plate surface on the boundary layer stability and laminar-turbulent transition is experimentally and theoretically investigated at the freestream Mach number \(M_{\infty}=2\). It is shown that, as a certain roughness value is reached, and with increase in the porous coating thickness (on a certain range), the boundary layer stability against natural disturbances diminishes and laminar-turbulent transition is displaced toward the leading edge of the model.
MSC:
| 76E05 | Parallel shear flows in hydrodynamic stability |
| 76N20 | Boundary-layer theory for compressible fluids and gas dynamics |
| 76F06 | Transition to turbulence |
| 76-05 | Experimental work for problems pertaining to fluid mechanics |
Keywords:
porosity; roughness; compressible boundary layer; laminar-turbulent transition; hydrodynamic stabilityReferences:
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