Laser Energy Deposition for Shock Wave Boundary Layer Control at Supersonic Speeds

摘要

Experiments are conducted to assess the control effectiveness of the laser energy deposition on shock wave boundary layer interaction flowfield over a sharp cone-cylinder-flare configuration at Mach 1.94. SWBLI region at the cylinder flare junction responded to convecting vortex ring due to baroclinic torque. This vortex ring altered SWBLI region in terms of size and severity. 5 kHz laser energy deposition significantly extended SWBLI region upstream whereas frequencies above 30 Khz suppressed the interaction and stabilised the flowfield at the cylinder-flare junction. Drag force measurements showed a decrease for 5 Khz whereas 30 and 60 Khz cases resulted in increased drag force levels.