北京航空航天大学学报 ›› 2008, Vol. 34 ›› Issue (09): 1080-1083.

• 论文 • 上一篇    下一篇

低滞后刷式密封数值分析

王之栎1, 梁小峰1, 宋飞1, 黄其武2   

  1. 1. 北京航空航天大学 机械工程及自动化学院, 北京 100191;
    2. 四川九洲电器集团有限责任公司 第二研究所, 绵阳 621000
  • 收稿日期:2007-09-10 出版日期:2008-09-30 发布日期:2010-09-17
  • 作者简介:王之栎(1961-),男,北京人,教授,wang_zl@buaa.edu.cn.

Low hysteresis brush seal numerical simulations

Wang Zhili1, Liang Xiaofeng1, Song Fei1, Huang Qiwu2   

  1. 1. School of Mechanical Engineering and Automation, Beijing University of Aeronautics and Astronautics, Beijing 100191, China;
    2. The Second Research Institute, Sichuan Jiuzhou Electric Group Co., Ltd., Mianyang 621000, China
  • Received:2007-09-10 Online:2008-09-30 Published:2010-09-17

摘要: 针对低滞后刷式密封物理结构,应用计入刷丝变形影响的各向异性多孔介质模型,用阻抗力表示刷丝对流动介质的阻碍作用,并将其作为Navier-Stoke方程的源项,以有限体积法和SIMPLE算法为基础建立刷式密封低滞后计算模型.通过流场计算,得到刷式密封的压力分布、速度分布以及泄漏量等.对计算结果进行了分析研究,讨论了不同结构参数和工况参数对密封性能的影响;对低滞后模型与普通刷式密封模型密封性能的分析表明,低滞后密封结构可有效降低背板接触力,改善滞后效应,使刷丝随动自适应性增加,这对保持密封系统的工作状态是有益的。

Abstract: In order to establish the calculation model of low hysteresis, an anisotropic porous model contained with the bristles bending deflections was employed based on the physical structure of low hysteresis brush seal. The effect of the bristles in the seal was considered a resistance force and was added into the N-S equation as a source term. The model was established on the basis of the finite volume method and the SIMPLE method. The pressure field,velocity vectors distribution and leakage were calculated and analysised. Based on the calculation date, the influence by the main parameters included structure and working condition was investigated. Compared with the common brush seal and low hysteresis brush seal, it is obvious that the low hysteresis brush seal can decrease the pressure between the bristle and the back ring and increase the bristle-s adaptability. In the working state it is beneficial to the seal system.

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