基于CFD的螺旋槽干气密封端面流场流态分析  

Fluid state analysis on flow field of gas seal with spiral groove based on CFD

作　　者：丁雪兴[1,2] 富影杰[1] 张静[1] 张伟政[1,2] 俞树荣[1,2] 

机构地区：[1]兰州理工大学石油化工学院,甘肃兰州730050 [2]兰州理工大学温州泵阀工程研究院,浙江温州325105

出　　处：《排灌机械工程学报》2010年第4期330-334,共5页Journal of Drainage and Irrigation Machinery Engineering

基　　金：国家自然科学基金资助项目(50965010);浙江省科技计划项目(2008C21131);温州市对外科技合作交流项目(H20080018)

摘　　要：应用Gambit软件建立三维螺旋槽干气密封模型,并对其进行了网格划分.在特定工况下,运用Fluent软件对螺旋槽干气密封内部微间隙三维气体流场的两种流态,即层流和湍流分别进行了数值模拟,得到了两种流态的压力分布、速度分布以及泄漏量.运用模拟得到的层流和湍流的速度,根据流动因子进行了理论计算,结果表明:螺旋槽干气密封端面气体是以层流流动的.将模拟得到的层流和湍流的泄漏量与其相同工况下试验所测得的泄漏量进行对比分析,结果表明:螺旋槽干气密封端面气体亦是以层流流动的,模拟层流泄漏量为6.92×10-6m3/s,试验值为6.94×10-6m3/s,十分接近.综合以上两种结果表明:在一定工况下,螺旋槽干气密封端面气体是以层流流动的.The three-dimensional model of spiral groove gas seal is carried out and meshed by Gambit software. On certain occasions,there are two flow patterns named laminar and turbulence in the three-dimensional micro-groove. The two kind of flow patterns are simulated with Fluent software. As a result, their pressure distribution,velocity distribution and leakage were obtained. With the simulation results, theoretical calculations proceeds according to the velocity of flow factor. The results show that fluid state in spiral groove gas face seal is based on laminar on certain operating conditions. The simulation leakage and the experimental data are compared and analyzed. The laminar leakage data of 6. 92 × 10^ -6 m^3 /s is very similar to the experimental one of 6. 94 × 10^-6 m^3 /s. In conclusion,fluid state in spiral groove gas face seal is based on laminar in certain operating conditions.

关 键 词：干气密封 螺旋槽 流态分析 CFD 数值模拟 

分 类 号：S277.92[农业科学—农业水土工程] TQ051[农业科学—农业工程]