Vane-blade interaction in a transonic turbine. II - Heat transfer

Part II of this article presents results of a combined computational/experimental investigation into the effects of stator-rotor interaction on the heat transfer distributions on the vane and blade of a transonic turbine stage. The predictions were obtained using a two-dimensional unsteady Navier-Stokes code described in Part I of this article, and the measurements were acquired in a short-duration shock tunnel facility. Twenty miniature thinfilm heat flux button gauges were mounted at the midspan of the vane and blade, and contoured inserts containing many thin-film gauges were used on the blade leading edge to spatially resolve the heat transfer rates in that high-gradient region. A grid refinement study was performed with steady noninteractive solutions to ascertain the minimum grid size needed to obtain grid-independent solutions. Predicted time-averaged and phase-resolved heat transfer rates are compared with measurements on the vane and blade.