Journals Proceedings

Abstract

The vortex shedding of a turbine blade is suppressed by making hole, connecting between the pressure side and suction side in the area of the trailing edge. Computational work is carried out using the numerical code developed in house. A Spalart–Allmaras turbulence model with Delayed Detached Eddy Simulation is used. The exit Reynolds number is 2.8  106 and the exit isentropic Mach number is 0.79. Three hole diameters are being investigated: 0.054D, 0.065D and 0.094D. Hole diameter of 0.094D is the best configuration, where the result shows that the wake loss reduces by a maximum of 10%, the pressure distribution along trailing edge has increased by 14% and the wake profile thickness reduces at maximum of 24% as compared with no hole blade. The wake loss is sensitive to the size and location of the hole.