Tangential injection to a supersonic flow on a blunted nose

Central Aerohydrodynamic Institute (TsAGI) 1 Zhukovsky Str., Zhukovsky, Moscow Region 140180, Russia

Abstract

The flow pattern and the heat §ux to a body surface at a tangential gas injecting have been investigated. The cooling air was injected to a §ow through the tangential axisymmetric slot on the spherically blunted cylinder. The experiments were conducted at M_∞ = 6, R_e∞,Rw = 0.76 · 10⁶, angle of attack α = 0^◦-30^◦, and the slot width h_k/R_w = 0-0.021. The mass rate of the injecting gas was G^∗ = g_j/(πρ_∞ u²_∞w) = 0- 0.16. It has been shown that maximum of the heat §ux toward the sphere surface can be sufficiently decreased. Numerical investigations have been carried out using the solution of the Navier€Stokes equations for axisymmetric two-dimensional (2D) viscous compressible unsteady §ows at α = 0.