不同加载形式高负荷低压涡轮的性能分析

Performance Analysis of High Loaded Low Pressure Turbine with Different Loading Distribution

通过设计负荷能力相同而负荷分布形式不同的3种叶型来分析在宽广的雷诺数范围内负荷分布对涡轮叶型边界层发展的影响规律。研究结果表明:后加载叶型对雷诺数的变化较为敏感,尤其是在低雷诺数范围内,而前加载和均匀加载则相对不敏感。研究结果可为设计适用于不同工况的叶型提供理论指导。

The effect law of loading distribution on boundary layer development at wide range Reynolds number was studied through design three turbine blades with different load distribution but same load level. The research indicated that after-loaded airfoil is more sensitive to Reynolds number especially when at the low Reynolds numbers while the front and mid loaded airfoil is less sensitive.The research can provide theory guidance for the design of airfoil which worked at different work condition.