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为了提高跨音速气冷涡轮的效率,减小涡轮内的二次流损失,基于弯叶片设计方法,编制了弯叶片生成程序,同时借助优化设计方法,对某高压涡轮进行了气动优化设计。优化过程中,在导叶中应用弯叶片技术,同时优化动叶进出口气流角,以适应动静叶间匹配的变化。优化结果显示,在流量及功率变化不大的前提下,级效率较原型提高0.3%。效率提高的主要原因是优化后导叶中横向二次流损失减小。
In order to improve the efficiency of the transonic air-cooled turbine and reduce the secondary flow loss in the turbine, a curved vane generating program is prepared based on the curved vane design method. At the same time, a high-pressure turbine is aerodynamically optimized by means of the optimized design method. In the process of optimization, curved blades are used in the guide vanes, and the air inlet and outlet angles of the moving blades are optimized so as to adapt to the change of matching between the moving and stationary blades. The optimization results show that the level efficiency is 0.3% higher than that of the prototype under the premise of little change in flow rate and power. The main reason for the increase in efficiency is the reduction of lateral secondary flow loss in the optimized guide vane.