采用以氦气比拟热斑的实验方法和三维非定常数值计算研究了两级涡轮入口处的热斑对二级静叶通道的影响。结果发现,热斑对二级静叶通道内的热负荷分布具有明显影响:在径向的分布集中于50%叶高以下,在叶栅进口和出口附近,热量集中于下端壁,并随径向高度增加减少;在周向有明显不均匀性;端壁二次流对热斑分布有很大影响。

Experiment with helium gas analogizing hot streak and a 3D unsteady numerical investigation were conducted about the effect of hot streak on the 2nd Vane in Two Stage Turbine. Results show that the hot streak has an obvious influence on the heat loading of the 2nd vane:(1) heat is focused on the zones less than 50% blade height in spanwise direction. Endwall is heated most heavily and the heat decreases with the height increasing near leading and trailing edges of the blades;(2) heat distribution is obvious uneven in pitchwise direction; (3) secondary flow on endwall is also an important factor varying the distribution of hot streak.

TK47

国家重点基础研究发展规划项目资助(G1999022305);国家自然科学基金资助项目(50376062)。