关键词: 涡轮盘;涡轮冷却器;传热系数;阻力系数

Abstract: A turbine cooling configuration of aero engine was simplified to be the rotating cavity with an tangential pre swirling fringe guide van and a radial outlet. The influences of rotating Reynolds number, cooling air Reynolds number and Grashoff number on the local heat transfer and flow characteristics were experimentally investigated. Experiment indicate that the flow pattern in the rotating cavity is mainly controlled by Rossby number. The local heat transfer coefficient on the edge of main disk rapidly increases with the increase of cooling air Reynolds number and rotating Reynolds number. The local heat transfer coefficient becomes negative near the center of the disk. The flow friction coefficient increases with the increase of cooling air Reynolds number and decreases with the rotating Reynolds number

Key words: Turbine wheel;Turboexpander;Heat transfer coefficient;Drag coefficrent