排灌机械工程学报
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排灌机械工程学报  2012, Vol. 30 Issue (1): 102-106    DOI: 10.3969/j.issn.1674-8530.2012.01.020
流体工程 最新目录 | 下期目录 | 过刊浏览 | 高级检索 Previous Articles  |  Next Articles  
基于CFD螺旋槽干气密封端面流场分析
俞树荣1, 曹兴岩1, 丁雪兴1, 张伟政1, 韩明君2
(1.兰州理工大学石油化工学院, 甘肃 兰州 730050; 2.兰州理工大学理学院, 甘肃 兰州 730050)
Analysis of flow field of spiral groove dry gas seal face based on CFD
YU Shu-Rong-1, CAO Xing-Yan-1, DING Xue-Xing-1, ZHANG Wei-Zheng-1, HAN Ming-Jun-2
(1.College of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou, Gansu 730050, China; 2.School of Science, Lanzhou University of Technology, Lanzhou, Gansu 730050, China)
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摘要 应用Solidworks软件对螺旋槽干气密封端面微尺度三维流场气膜进行建模,并运用Fluent软件对三维流场模型以层流流动形式进行数值模拟计算.在特定工况下,根据计算所得端面流场产生的动压效果和径向流速,确定使端面气膜推力(即开启力)和泄漏量同时达到最优时的气膜厚度;在确定的气膜厚度下,即分别为3.5,4.5,5.5 μm时进行数值模拟计算,通过改变压力和转速,研究不同压力和转速对端面泄漏量和功耗的影响.结果表明:当气膜厚度在3~6 μm时,产生较好的动压效果和较小的径向出口流速;当气膜厚度取为3.5 μm 时,端面总体效果达到最好,即产生动压效果最好,出口径向流速最小;当气膜厚度和压力确定时,泄漏量和功耗随着转速的增大而增大,且成线性关系;当气膜厚度和转速确定时,泄漏量和功耗随着压力的增大而增大,也成线性关系.
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俞树荣1
曹兴岩1
丁雪兴1
张伟政1
韩明君2
关键词干气密封;   端面流场   三维数值模拟   气膜厚度   泄漏量   功耗     
Abstract: The threedimensional microscale models of flow domain between two matching rings with spiral grooves in a dry gas seal was built by Solidworks,then the steady laminar flow in the models with various gas film thicknesses was numerically calculated by Fluent.At a special condition,a gas film thickness,which allows both the opening force in the film and the leakage through the film can achieve optimal values simultaneously,was determined based on the predicted dynamic pressure effect and radial flow velocity.For a series of gas film thickness,namely 3.5,4.5,5.5 μm,the effects of surrounding pressure and rotational speed of rotating ring on the leakage and power consumed were investigated.The results showed that a better dynamic effect and less leakage are obtained with the film thickness of 3-6 μm; moreover,the best dynamic effect and minimum leakage are achieved at the thickness of 3.5 μm.The leakage and power consumption rise linearly with increasing rotational speed as the film thickness and surrounding keep to be constant.Similarly,the leakage and power consumption arise linearly with increasing pressure as well when the film thickness and rotational speed remain unchanged.
Key wordsdry gas seals   flow field between two faces   threedimensional numerical simulation   gas film thickness   leakage;power consumption   
收稿日期: 2011-05-12; 出版日期: 2012-01-30
基金资助:

国家自然科学基金资助项目(50965010); 高等学校博士学科点专项科研基金资助项目(20096201110001)

通讯作者: 俞树荣(1962—),男,甘肃兰州人,教授,博士生导师(yusr@lut.cn),主要从事流体机械动密封研究.   
作者简介: 曹兴岩(1985—),男,辽宁沈阳人,硕士研究生(caoxingyan_007@163.com),主要从事流体机械动密封研究.
引用本文:   
俞树荣1,曹兴岩1,丁雪兴1等. 基于CFD螺旋槽干气密封端面流场分析[J]. 排灌机械工程学报, 2012, 30(1): 102-106.
YU Shu-Rong-1,CAO Xing-Yan-1,DING Xue-Xing-1 et al. Analysis of flow field of spiral groove dry gas seal face based on CFD[J]. Journal of Drainage and Irrigation Machinery Engin, 2012, 30(1): 102-106.
 
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