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| Study on solid-liquid two-phase flow characteristics of lubricating film in upstream pumping mechanical seal |
| Chen Huilong1, Zuo Muzi1, Wu Qiangbo1, Xu Cheng1, Wang Yu1, Li Shulin2 |
| 1.School of Energy and Power Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China; 2.Nanjing Engineering Institute of Aircraft Systems, AVIC Jincheng, Nanjing, Jiangsu 211100, China |
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Abstract A three-dimensional geometry model and a numerical simulation model are established for an upstream pumping mechanical seal to study the solid-liquid two-phase flow characteristics of lubricating film in the seal. The two-phase flow in the film is simulated in Fluent based on the mixture model. The solid particle distribution features, the effects of particle volume fraction on the sealing performance are analyzed. The two-phase flow results are compared with the single-phase flow simulation. It is shown that the particles mainly culminate in the root surface of a spiral groove and on the sealing surface next to the root surface. Such a pattern becomes more evident with the increasing particle concentration. Meanwhile, the opening force of liquid film and the friction torque are augmented with the increasing particle volume fraction in the range of parameters achieved in the study.
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Received: 16 February 2014
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