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)
Abstract：The threedimensional microscale 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.
俞树荣, 曹兴岩, 丁雪兴, 张伟政, 韩明君. 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, CAO Xing-Yan, DING Xue-Xing, ZHANG Wei-Zheng, HAN Ming-Jun. Analysis of flow field of spiral groove dry gas seal face based on CFD. Journal of Drainage and Irrigation Machinery Engin, 2012, 30(1): 102-106.
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