基于CFX的实验台迷宫密封动特性数值计算  

Dynamic Characteristics Numerical Calculation of Labyrinth Seal in Experimental Table by CFX

作　　者：崔亚辉 王路遥[2,3] 张俊杰 刘红[2] 李雪松[2] 王浩 渠福来 

机构地区：[1]神华国华(北京)电力研究院有限公司,北京100025 [2]清华大学,北京100084 [3]中电投上海电力股份有限公司,上海200090

出　　处：《汽轮机技术》2016年第4期253-256,259,共5页Turbine Technology

摘　　要：为了配合汽流激振实验数据的验证,根据所建立的汽流激振实验台的结构参数,建立迷宫密封的二维几何模型。采用k-ε湍流模型进行数值模拟,通过数值仿真研究了实验密封件的密封特性。获得了齿顶间隙分别为0.2mm、0.3mm、0.4mm和0.8mm的迷宫密封的动特性系数及泄漏量,对密封腔室内的流场进行了深入观察和分析。针对齿顶间隙为0.2mm的迷宫密封,分别计算了-60°、-45°、0°、45°、60°预旋下系统的动特性系数和泄漏量。研究结果可与后续实验数据进行比对,并为后续的汽流激振机理研究做准备。In order to combine the experimental data verification of steam-excited vibration, according to structure parameters of steam-excited vibration experimental table, the two-dimensional geometric model of labyrinth seal was built. Numerical simulation was implemented by k-ε turbulence model, sealing characteristics of experimental sealing element were studied by numerical simulation. Dynamic characteristics coefficient and leakage of labyrinth seal were gained under tip clearance was respectively 0.2mm,0.3mm, 0.4mm and 0.8mm, flow field in the seal chamber was observed and analyzed deeply. Aiming at tip clearance of labyrinth seal was 0.2 mm, dynamic characteristics coefficient and leakage of system were calculated under prorogation was respectively -60°, -45° ,0° ,45° ,60°. The results of the study can compared with subsequent experimental data, and make preparations for subsequent steam-excited vibration mechanism research.

关 键 词：汽流激振 迷宫密封 密封动特性 数值计算 

分 类 号：TK261[动力工程及工程热物理—动力机械及工程]