Abstract
This study investigates separation control using vortex generator jets on a test model which is subjected to favorable and adverse pressure gradients. The final target of this study is to control the separation on the aft-loaded turbine blade in the unsteady main flow. The numerical simulation is to control the separation using steady vortex-jets (VGJs) in the steady main flow. The test model has two curves to create a shape for establishing a pressure gradient typical to an aft-loaded turbine blade. There are 7 holes, and these holes have a 5.0mm diameter with a 30-degree or 45-degree pitch angle and a 90 degree skew angle. The injection location is set at the point of maximum velocity on the test model. The velocity of the jet is fixed at four times the velocity of the main flow. It is found that the effect of separation control is obtained from a 45-degree pitch angle.
