Control of Incident Shock-Induced Separation Using Vane-Type Vortex-Generating Devices

Abstract

An experimental investigation was conducted to control an incident shock-induced boundary-layer separation associated with a 14 deg shock generator in a Mach 2.05 flow. Two vane-type configurations, namely the triangular (, 0.5, 0.8, 1.0) and the rectangular () designs, were studied. An array of each control device was tested for three control locations of , 10, and 15. The control location of is seen to show the maximum reduction in separation length for each device tested. For the rectangular-vane device (), a maximum reduction of 38% in separation length is observed, followed by the triangular-vane devices of and 1.0, each of which shows a 32% reduction, and finally, with 18%. The effectiveness of these devices to control separation is, however, seen to decrease with increase in . In terms of separation shock unsteadiness, the maximum rms value for shows the highest value for each control device, and this value decreases with increase in control location. At , both the rectangular vane () and triangular vane () show a 50% reduction in maximum rms value, whereas it decreases to 30% at for these devices.