EFFECTS OF ASYMMETRICAL VORTEX INTERACTION BY VARIABLE SWEPT VORTEX GENERATOR (VSVG) ON MASS TRANSFER ENHANCEMENT

Unsteady RANS simulation of high-speed flow and heat transfer over a heated plate with a variable swept vortex generator (VSVG) is presented. Unsteady three-dimensional turbulent compressible flow and heat transfer are numerically solved using Advection upstream splitting method (AUSM)-based Finite Volume Solver. The computational procedure has been validated using the experimental data reported for a similar kind of vortex generator placed over a heated plate. Simulations have been performed for vortex generators with the same lateral sweep on both sides as well as different lateral sweep on either side. Variable swept vortex generator sets in an asymmetrical vortex–boundary layer interaction which can enhance the heat transfer in comparison with symmetrical vortex interactions realized by a similar vortex generator with the same lateral sweep. It is observed that the asymmetric counter-rotating vortex pair is generated when the high-speed flow spills over the slanting surface of the vortex generator, which can enhance mixing and transport downstream.