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为减少气冷涡轮气动设计难度,提出一套基于多级气冷涡轮考虑冷气掺混及随流道翘曲、变厚度的S1流面计算思路,编制了带冷气的翘曲S1流面薄片计算的参数化方法程序及网格自动生成程序,改良了传统平面薄片,对比分析了改良后平面薄片、翘曲S1流面薄片以及三维计算间差异,对某高压涡轮进行了翘曲S1流面薄片气动优化.结果显示:与三维计算对比,改良后平面薄片最大流量差距为22.68%,翘曲S1流面薄片为3.58%,一维数据上翘曲S1流面薄片更逼近三维计算;型面压力分布及马赫数云图分布上翘曲面S1流面薄片较改良后平面薄片更贴近三维计算;采用翘曲S1流面薄片进行优化后,效率较原始方案提升0.41%,流量较原始方案仅增加0.21%.
In order to reduce the difficulty of aerodynamic design for gas-cooled turbines, a set of calculation methods based on multi-stage gas-cooled turbomachinery with regard to the blending of cold air and the S1 flow surface with warping and thickening of the flow channel are proposed. The parameterized method program and the grid automatic generation program are introduced to improve the traditional flat sheet. The difference between the improved flat sheet, the warped S1 surface sheet and the three-dimensional calculation is compared and analyzed. The warpage S1 sheet of a high-pressure turbine Pneumatic optimization.The results show that the difference of the maximum flow rate is 22.68% and the warpage S1 flow rate is 3.58% compared with the three-dimensional calculation, and the one-dimensional data warpage S1 flow rate is closer to the three-dimensional calculation. Distribution and Mach number cloud profile S1 warp surface flow sheet is better than the improved planar sheet closer to the three-dimensional calculation; warped S1 flow sheet optimization, the efficiency of 0.41% compared with the original program, the flow rate of the original program increased by only 0.21% .