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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。
For a certain type of 850 horsepower turboshaft engine, multi-arc and five-curve modeling methods are used in this paper. The aerodynamic design of high-pressure turbines and power turbines is tentatively attempted. The cooling structure is adopted on the high-pressure turbine stator vane to reduce the surface temperature of the vane. The CFD calculation and analysis are carried out. The results show that the designed cooling structure effectively reduces the surface temperature of the vane. There is separation inside the high pressure turbine, which increases the flow loss. There is no obvious separation of the power turbine. Overall turbine efficiency meets design requirements and turbine design needs to be optimized to improve turbine performance.