Influence of Holes in Vortex Generators on the Thermal Performance of Flat Plate

Abstract

Vortex generators (VGs) are used in aviation to delay boundary layer separation, which is crucial for increasing the critical angle of attack and, as a result, delaying the aircraft's entry into stall. This is because the vortex generators (VGs) increase the flow energy within the boundary layer. In this paper, the impact of punched triangular vortex generators on convective heat transfer was investigated on a flat plate. Using a wind tunnel (DUC), four pairs of triangular vortex generators were placed on a flat plate, with nine thermocouples implanted in it to measure the temperature change. Three experiments were conducted: the first with a flat plate without a VG, the second VG without holes, and the last VG with holes. The results showed that the presence of the holes had a positive effect on improving heat transfer.