大型汽轮机低压排汽缸气动分析研究  

Aerodynamic Performance Analysis of LP Exhaust Hood for Large Power Steam Turbine

作　　者：江生科[1] 彭英杰[1] 

机构地区：[1]东方汽轮机有限公司,四川德阳618000

出　　处：《东方汽轮机》2014年第2期1-4,10,共5页Dongfang Turbine

摘　　要：低压排汽缸的气动性能影响汽轮机组的功率和效率。文章对单独排汽缸和汽轮机低压末级整圈与排汽缸耦合进行了数值分析对比,发现汽轮机末级动叶出口流场的不均匀性和强烈的预旋影响低压排汽缸的气动性能。高性能的低压排汽缸设计应该考虑末级与低压排汽缸流场之间的相互作用。Aerodynamic performance of the LP exhaust hood influenced power and efficiency of the steam turbine. Numerical anal- ysis for single cylinder and LP last stage coupling with exhaust hood showed that the exit flow field＇s inhomogeneity and pre-swirl of last stage blade affected the aerodynamic performance of LP exhaust hood. Design of LP exhaust hood with high perfurmance should consider the interaction of the last stage and flow field of LP exhaust hood.

关 键 词：排汽缸 气动性能 数值分析 耦合 

分 类 号：TK262[动力工程及工程热物理—动力机械及工程]