用CFD研究涡轮静叶栅的二次流损失  

Numerical simulation on secondary flow of turbine stator cascade by CFD

作　　者：李军[1] 

机构地区：[1]上海交通大学动力机械与工程教育部重点实验室,上海200030

出　　处：《燃气轮机技术》2007年第4期43-46,共4页Gas Turbine Technology

摘　　要：利用CFD软件Fluent对大转折角涡轮叶栅三维流场进行了数值模拟。采用静叶栅前移动的圆柱列替代上游动叶,发现圆柱尾迹进入叶栅流道的位置不同,对叶栅总压损失有较大影响。同时,通道内逐渐增大的横向压力梯度对二次涡发展产生了显著的影响,引起沿流向叶栅总压损失的急剧增大,认为叶高的减小会极大提高叶栅的二次流损失。Three dimensional flow field of a large turn angle turbine stator cascade is simulated by fluent. Upstream moving cylinder row is used to replace the upstream blade .It is found that the different cylinder wake position will gain different stator total pressure loss .At the same time, the secondary flow from pressure side to suction side enhances gradually along flow direction , which sharply increases the total pressure loss. At last,it is found that the decrease of blade height will greatly aggravate the blade secondary flow.

关 键 词：二次流 涡轮 叶栅 数值模拟 

分 类 号：TK472[动力工程及工程热物理—动力机械及工程]