Simulations of Mesoflap Control for Ramp-Generated Oblique Shock/Boundary-Layer Interactions

Abstract

A novel e ow-control method called mesoe aps for aeroelastic recirculation transpiration was computationally investigated for ramp-generated oblique shock/boundary-layer interactions (SBLIs). The numerical approach was e rst validated for three different ramp SBLI e ows with a solid wall, in terms of both pressure distributions and velocity proe les. For the mesoe ap e ow-control method, a series of dee ected e aps is placed over a cavity centered beneath the inception point of an oblique shock. The e ow-control performance was investigated by measuring total pressure recovery and integral boundary-layer displacement thickness for a variety of preset e ap dee ection magnitudes and incoming Mach numbers. The control of an SBLI for a 16-deg compression corner with mesoe aps and incoming Mach numbers of 2.35‐ 2.85 revealed signie cant improvement in total pressure recovery (as compared to the solid-wall case), especially as the dee ections of the e aps increased. The lowest incoming Mach number investigated yielded the highest recovery of total pressure downstream of the shock. Although the e ap cases yielded some increases in the displacement thickness and momentum thickness of the outgoing boundary layer as compared to the solid wall, the shape factor was maintained at approximately the same level as found for the solid-wall cases.