© IC-SCCE COMPRESSIBLE TURBULENT BOUNDARY-LAYER FLOW CONTROL

The effects of blowing and suction on the steady compressible boundary-layer flow with adverse pressure gradient and heat transfer over a wedge are numerically examined. The fluid is considered to be a compressible, viscous and Newtonian ideal gas (air) and it is subjected to a constant velocity of suction/injection applied globally to the wedge or locally to specific slots on the surface. The Reynolds-Averaged Boundary-Layer (RABL) equations and their boundary conditions are transformed using the compressible Falkner-Skan transformation. The resulting coupled and nonlinear system of PDEs is solved using the Keller box method. For the eddy-kinematic viscosity the turbulent models of Cebeci-Smith and Baldwin-Lomax are employed. For the turbulent Prandtl number the extended model of Kays-Crawford is used. Numerical calculations are carried out for the case of an adiabatic, cooled or heated wall and for different values of the dimensionless pressure-gradient parameter (m). The obtained results show that the flow field can be controlled by the suction/injection velocity for different values of the parameter m.