雷诺数对涡轮部件性能的影响  

The Effects of Reynolds Number on the Characteristics of the Low Pressure Turbine

作　　者：李维[1] 邹正平[2] 赵晓路[1] 

机构地区：[1]中国科学院工程热物理研究所,北京1000801 [2]北京航空航天大学能源与动力工程学院,北京100083

出　　处：《航空动力学报》2004年第6期822-827,共6页Journal of Aerospace Power

基　　金：国家自然科学基金资助项目(502006001);航空科学基金资助项目(03C51030)

摘　　要：利用数值模拟手段研究了雷诺数对低压涡轮部件性能的影响,分析了低压涡轮内部流动的变化。结果表明低压涡轮效率随雷诺数降低而下降,且其变化趋势为非线性变化;叶片表面速度分布亦发生较明显的变化,导致叶型损失与二次流损失增大;结果还表明叶片表面速度分布的设计对涡轮性能随雷诺数变化的规律具有重大影响,在低雷诺数条件下涡轮部件的设计中需加以注意。The effect of Reynolds number on the characteristics of the Low Pressure Turbine (LPT) was investigated and the variations of flow structures with Reynolds number were analyzed by numerical simulation.The results show that the efficiency of LPT is decreased with the reduction of Reynolds number,and the relationship between the efficiency and Reynolds number change is non-linear.Obvious changes of blade surface velocity distribution at different Reynolds number can be found,which induce the increases of profile loss and secondary flow loss.The results also show that the design of blade surface velocity distribution has significant influence on turbine characteristics change with Reynolds number.It is very important to the aerodynamic design of LPT which is intended to operate at low Reynolds number conditions.

关 键 词：航空、航天推进系统 雷诺数 涡轮 叶型损失 二次流损失 

分 类 号：V211.1[航空宇航科学与技术—航空宇航推进理论与工程]