汽轮机直齿与斜齿汽封内部流场的数值计算与结构优化  

Numerical Simulation of Flow Fields in Steam Turbine Labyrinth Glands with Straight and Slanting Teeth and their Structural Optimization

作　　者：韩中合[1] 康乐嘉[1] 

机构地区：[1]华北电力大学电站设备状态监测与控制教育部重点实验室,保定071003

出　　处：《动力工程》2007年第4期473-476,共4页Power Engineering

基　　金：华北电力大学重大预研基金(20041304)

摘　　要：利用数值计算软件对汽轮机光轴直齿与斜齿两种结构的迷宫式汽封内部流场进行了数值研究,给出了汽封内部流动特性和漏汽量随相对齿间距和齿倾斜角度变化的规律。在汽封段轴向长度一定和相同的流动条件下,存在最佳齿数范围和倾角范围,它可使迷宫式汽封的漏汽量最小。The flow field in steam turbine labyrinth glands, composed of a smoth shaft and straight or inclined sealing teeth, has been studied with the help of numerical simulation software; obtaining herewith the flow particularities within glands and desclosing rules, that govern steam leakage, for different teeth pitches and different slanting angles, For a fixed length of the shaft section and under same flow conditions, there is a certain range in tooth number and a range of the slanting angle, for which steam leakage becomes minimal.

关 键 词：能源与动力工程 汽轮机 迷宫式汽封 数值模拟 结构优化 

分 类 号：TK263.2[动力工程及工程热物理—动力机械及工程]