【摘要】 明晰涡轮转子凹槽叶尖控制泄漏流动的物理机制，对凹槽叶尖结构优化和提升涡轮效率有重要意义。本文数值研究了跨音速高压涡轮凹槽叶尖的泄漏流动特性，对比分析了其与平叶尖泄漏损失和流动结构的差异，并研究了凹槽腔内流动结构改变对泄漏流动的影响。结果表明，凹槽叶尖对泄漏流动的堵塞分两个区域，分别受吸力侧空腔涡和削刮涡影响，改变外机匣相对转动速度会影响凹槽腔内流动结构的范围和强度，进而影响泄漏流动特性。本文的研究结果可为凹槽叶尖的设计提供指导。更多还原

【Abstract】 To optimize the structure of cavity tip and improve the efficiency of turbine, it is critical to comprehend the mechanism behind leakage flow control of the cavity tip. The leakage flow of cavity tip in a transonic high-pressure turbine blade is studied numerically. The difference in leakage loss and flow structure between the cavity tip and flat tip is analyzed, while also examining the effects of flow structure in the cavity on the leakage flow. It is found that the leakage flow is blocked by the cavity tip in two regions, which are affected by suction side cavity vortex and scraping vortex. The flow structure undergoes variations with changes in the casing relative velocity, which will impact the leakage flow. The results of this study can provide valuable insights for the design of cavity tips.更多还原