向心涡轮内部流动数值模拟分析  

Numerical Simulation of the Flow Inside Radial Inflow Turbine

作　　者：冯涛[1] 周颖[2] 邹正平[1] 李维[2] 丁水汀[1] 徐国强[1] 

机构地区：[1]北京航空航天大学能源与动力工程学院航空发动机气动热力重点实验室 [2]中国航空动力机械研究所,湖南株洲412002

出　　处：《航空动力学报》2006年第3期448-454,共7页Journal of Aerospace Power

基　　金：国防基础科研基金资助(K1204060722);国防科技重点实验室基金资助(51459060104HK3802)

摘　　要：利用三维数值模拟方法对向心涡轮内部流动进行数值模拟,分析了岛型导叶的气动特点、通道中的二次流动和各个涡系的发展以及不同叶尖间隙对流动的影响。结果表明:在一定范围内岛型导叶对气流角变化不敏感;在靠近动叶进口处二次流动比较明显,流动比较复杂,而通道中各个涡系的演化发展都集中在靠近动叶吸力面一侧;随着的罩壳半径的减小,动叶叶尖处间隙流动逐渐增强;适量的间隙流动有利于改善通道顶部区域流动。Three-dimensional numerical simulation of the flow inside a radial inflow turbine was presented. Preliminary analysis of the aerodynamic characteristics of the island shaped blade, secondary flow and development of vortex and impact of tip clearance were conducted. Results show that island shaped blade has little sensitivity to flow direction in certain range; secondary flow is evident near the inlet of the impeller and close to the suction surface of the passage;along with the reduction of shroud radius,tip clearance flow of the rotor becomes strong. Appropriate tip clearance flow can improve the flow in the tip region.

关 键 词：航空 航天推进系统 向心涡轮 数值模拟 二次流动 间隙流动 

分 类 号：V221[航空宇航科学与技术—飞行器设计]