基于氦氙混合工质特性，利用Axial软件对比了不同载荷系数和流量系数情况下涡轮的效率，在载荷系数和流量系数分别为1.8和0.6的情况下涡轮效率较高。在此条件下利用AxCent软件对轴流涡轮进行了三维叶片造型。在ANSYS CFX软件中选用SST湍流模型，在给定的工况下对设计好的叶片采用数值模拟方法分析尾缘折转角、尾缘楔角及安装角对激波损失的影响。研究表明：尾缘折转角在5.5°~6.5°之间，尾缘楔角在11°~13°范围内激波损失最低；安装角在43°~48°之间，随着安装角的增大会使激波损失降低；同时，对原始叶型的优化表明，吸力面改进为直线型并且增大压力面曲率会降低激波损失。

The helium-xenon axial turbine is one of the main components of the closed Brayton cycle.However,there are few domestic researches on the design of such rare working fluid axial turbine.In this paper,based on the characteristics of the helium-xenon mixed working fluid,the Axial software was used to compare the efficiency of the turbine under different load coefficients and flow coefficients.When the load coefficient and flow coefficient are 1.8 and 0.6 respectively,the turbine efficiency is high.On this basis,the AxCent software is used to model the three-dimensional blades of the axial flow turbine.The SST turbulence model is selected in ANSYS CFX software,and the designed blade is numerically simulated under given working conditions.The influence of trailing edge angle,trailing edge wedge angle and mounting angle on shock loss is stuclied.The results show that the trailing edge angle is between 5.5° and 6.5°,and the trailing edge wedge angle is between 11° and 13°,within which the shock loss is the lowest.When the mounting angle is between 43° and 48°,the shock loss decreases with the increase of the mounting angle.Meanuhile,The optimization of the original blade shape shows that the shock loss can be reduced by improving the suction surface to linear and increasing the pressure surface curvature the numerical simulation calculation,the flow field of the original.

TK221

国家科技重大专项（2017-Ⅰ-0011-0012）；国家自然科学基金（51809065）