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中文摘要：
针对某型850马力涡轴发动机，本文采用多圆弧和五次曲线造型方法，初步尝试开展了高压涡轮和动力涡轮的气动设计。对高压涡轮静叶采用了冷却结构，以降低静叶表面温度。对其进行了CFD计算和分析，结果表明，所设计的冷却结构有效地降低了静叶表面温度；高压涡轮内部有分离存在，增大了流动损失；动力涡轮无明显分离存在。总体而言涡轮效率达到了设计要求，还需对涡轮的设计进行优化，以提高涡轮性能。
英文摘要：
This paper performed the aerodynamic design of the high pressure turbine and power turbine of an 850 Hp turbo-shaft engine with multi-arc and fifth polynomial curves. A particular cooling structure was designed in the high-pressure turbine vanes with the intention of decreasing the temperature of the stator blades. The numerical computations were performed for the flow in the turbine cascades and the computed results showed that the designed cooling structure decreased the temperature of the stator blades efficiently. The flow losses of the high pressure turbine increased due to the separation in the high pressure turbine cascades. The computed results indicated that there is no distinct separation within the power turbine cascades. Generally the performance of the turbine had met the design goal and the optimization will be carried out in order to improve the performance.
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