Numerical Study on the Biomimetic Trailing Edge of a Turbine Blade Under a Wide Range of Outlet Mach Numbers

This study was carried out to investigate the loss mechanism of a blade with harbor seal whisker structure on trailing edge under different Mach numbers. The high-pressure turbine blades four geometries, including prototype, an elliptical (ETE), sinusoidal (STE), and biomimetic (BTE) at numbers 0.38–1.21 is studied. delayed detached-eddy simulation method used predict detailed flow cascades. result shows that, when number less than 0.9, BTE can effectively reduce energy coefficient compared other three cases. As increases, three-dimensional characteristics wake behind weaken. close that ETE STE greater 0.9. Besides this, by controlling wake, suppress dynamic movement shock waves in cascade high