Experimental and Numerical Study of Transonic Turbine Cascade Flow

摘要

A comprehensive study of the flowfield through a two-dimensional cascade of high-pressure turbine blades is presented. The experimental studies were carried out on a cascade of 11 blades in a blow-down tunnel. The static pressure was measured on the cascade side wall and on the blade surfaces. Total pressure and total temperature measurements were taken upstream of the cascade. Shadowgraph pictures were taken for a study of the trailing- edge shock structure and for the turbulent transition location. A single-plate interferometer technique with a new evaluation method was used for density field measurement. For the numerical studies the full Navier-Stokes equations were solved on a nonperiodic C grid.