中文摘要：

本文采用CFD方法细致分析了Hannover四级轴流透平在多种工况下各排叶栅的流动损失,将损失分解为叶型损失、端部损失和间隙泄漏损失,成功地建立了动、静叶端部损失和间隙泄漏损失沿叶高的的分布规律。在多级环境下,各级静叶和动叶损失规律是相似的,相邻前排叶栅会使后排叶栅的叶型损失项增加30%,但是非相邻叶栅之间几乎没有影响。基于CFD结果,在AMDC损失模型中引入前排叶栅的修正后,提高了多级透平性能的预测精度。

英文摘要：

CFD calculation is carried out to analyze the flow losses in Hannover four-stage axial turbine at alternative operation conditions.Resulted flow losses are categoried into profile loss,end wall loss and tip leakage loss.Spanwise distributions of end wall loss and tip leakage loss are expressed in unitied formula for both stator and rotor flows.In multi-stage axial turbine,the spanwise loss distributions behave in similar mathematical profile for each blade row.Intra-row effect is found that the profile loss of downstream blade row is raised by 30 percent by the adjacent upstream row.But upstream row affects neglectable loss on non adjacent blade ones.Based on the CFD results,intra-row effect is correlated in AMDC loss model to improve the performance prediction in multi-stage axial flow turbine.