Shinsuke Dambara

Modeling of Boundary Condition for Turbulent Boundary Layer Bleed

In this paper, a new model of boundary condition for bleed with porous holes is proposed. This model is based on the experimental evidence that the local bleed rate is primarily a function of the local flow conditions. We propose a model to simulate flow fields of a shock wave/turbulent boundary layer interaction with bleed at freestream Mach number of 2.5 with 6.0 and 8.0 deg shock generator angles. The computational results are compared with experimental data which contain wall static pressure and bleed flow rate distributions. It is shown that the agreement is improved by using our method for the bleed boundary condition.

Numerical Investigation on Suppression of 3-Dimensional Shock Wave/Turbulent Boundary Layer Interaction by Passive Cavity

Suppression of three-dimensional shock wave/turbulent boundary layer interaction is one of the important subjects on supersonic air intake. In the present study, the passive control of 2- and 3-dimensional shock wave/turbulent boundary layer interactions is considered. First, computations are performed for two-dimensional flow field at freestream Mach number of 2.46 with various passive cavities beneath the interaction region. The results suggest that the parallel blowing from a cavity to the mean flow with a guide plate can highly keep the interaction region narrow. Next, the most suitable cavity shape clarified in the 2-dimensional computations is applied to the 3-dimensional swept shock wave/turbulent boundary layer interaction at Mach number of 3.11. It is exhibited that the blowing direction is important, and the effect of passive cavity is nearly the same as the bleeding.Copyright