SHOCK-WAVE BOUNDARY-LAYER INTERACTION WITH HEAT ADDITION BY NONEQUILIBRIUM PHASE-TRANSITION

This investigation deals with the interaction of a turbulent boundary layer and a normal shock wave caused by supercritical heat addition in homogeneously condensing flows. The method used is a combination of a nalytical and numerical procedures, which is based on the perturbation method of Bohning & Zierep for the shock/boundary layer interaction i n adiabatic flow. The homogeneous condensation process is described by the classical nucleation theory of Volmer together with the molecular droplet growth law of Hertz and Knudsen. The cooling rate, the nuclea tion rate, the surface-averaged droplet radius and the condensate mass fraction are analyzed along several streamlines in the boundary layer . The strength of the shock wave caused by supercritical heat addition in the outer flow field weakens and ultimately vanishes near the boun dary edge by the influence of viscous effects. Comparison is made of t he integral boundary layer variables and the friction coefficient in a diabatic flow with those in diabatic flow.