Injection slot location for boundary-layer control in shock-induced separation
Previously cited in issue 18, p. 726, Accession no. A78-41866
Viswanath, P. R.↗
Engineering topics
Prabhu, A.
Publications and source records attributed to Prabhu, A..
Injection slot location for boundary-layer control in shock-induced separation
An experimental investigation of the effect of tangential air injection, when the injection slot is located inside of what would otherwise have been the dead air zone in a separated flow, in controlling shock-induced turbulent boundary layer separation is presented. The experiments were carried out at a free-stream Mach number of 2.5 in the separated flow induced by a compression corner with a 20 deg angle. The observations made were wall static pressures, pitot profiles, and schlieren visualizations of the flow. The results show that the present location for injection is more effective in suppressing boundary-layer separation than the more conventional one, where the slot is located upstream of where separation would occur in the absence of injection.
Viswanath, P. R.↗
Visualization of relaminarizing flows
The experiments described in the present paper provided conclusive evidence for the feasibility of achieving reverse transition by several different mechanisms. Turbulent-to-laminar transition in water was visualized by injection of purple and green dyes. Air flows were visualized by colored schlieren photography.
Viswanath, P. R.↗