Unsteady Behaviors of Turbulent Kinetic Energy Distribution on Low Pressure Turbine Blade for Aero Engine

(Detailed Analysis by PIV Measurement)

Abstract

This study conducted PIV measurement of the flow of the suction surface of low pressure turbine for aeroengine. In the past, various researchers have investigated the change in turbulence kinetic energy (TKE) and production terms in the TKE equation due to periodic wake passing, however there are few survey examples using PIV measurement. Therefore, we measured the flow field of the boundary layer using a large-scale linear cascade test equipment with a wake generator. In the steady condition, turbulence statistics, such as TKE, reynolds stress and value of production term in the TKE equation were increased by vortex roll-up. On the other hand, in the unsteady condition, they fluctuated due to the periodic wake flows.