采用边界层抽吸方法提高透平通流部分效率  

IMPROVING THE EFFICIENCY OF TURBINE THROUGH-FLOW PASSAGE USING THE TECHNIQUE OF BOUNDARY LAYER SUCTION

作　　者：孙弼[1] 刘晓峰[1] 鄢宇鹏[1] 

机构地区：[1]西安交通大学

出　　处：《西安交通大学学报》1996年第6期48-53,共6页Journal of Xi'an Jiaotong University

摘　　要：介绍采用边界层抽吸提高透平通流部分效率的方法．给出了叶栅端部次流损失与来流边界层位移厚度间的定量关系．通过边界层计算和透平级通流计算，确定合理的抽吸流量和相关的透平级通流部分主要结构尺寸，分析对透平级效率及热力特性的影响．对２００ＭＷ汽轮机高压缸的计算表明，采用抽吸技术，可使缸效率提高０．４％左右．A method to improve the efficiency of the turbine through-flow passage using the technique of boundary layer suction is introduced. The quantitative relationship between the secondary loss in turbine blade rows and the upstream boundary layer displacement thickness is given. With the calculations of boundary layer and turbine through-flow, the rational suction flow rate and main structure size of the turbine thrugh-flow passage are determined.The influences of suction on the turbine stage efficiency and the thermal performance are also analyzed. The calculation results for the HP cylinder of a 200 MW steam turbine show that the cylinder efficiency may be increased by 0.4% using the technique of boundary layer suction.

关 键 词：边界层 抽吸 汽轮机 透平级通流 透平级效率 

分 类 号：TK261[动力工程及工程热物理—动力机械及工程]