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凹槽射流对袋型阻尼密封泄漏特性与动力特性影响机理

郭金道 孙丹 赵欢 肖忠会 孟继纲 胡永

郭金道, 孙丹, 赵欢, 肖忠会, 孟继纲, 胡永. 凹槽射流对袋型阻尼密封泄漏特性与动力特性影响机理[J]. 航空动力学报, 2022, 37(2): 308-319. doi: 10.13224/j.cnki.jasp.20210021
引用本文: 郭金道, 孙丹, 赵欢, 肖忠会, 孟继纲, 胡永. 凹槽射流对袋型阻尼密封泄漏特性与动力特性影响机理[J]. 航空动力学报, 2022, 37(2): 308-319. doi: 10.13224/j.cnki.jasp.20210021
GUO Jindao, SUN Dan, ZHAO Huan, XIAO Zhonghui, MENG Jigang, HU Yong. Mechanism of influence of notch jet-flow on leakage and rotordynamic characteristics of pocket damper seals[J]. Journal of Aerospace Power, 2022, 37(2): 308-319. doi: 10.13224/j.cnki.jasp.20210021
Citation: GUO Jindao, SUN Dan, ZHAO Huan, XIAO Zhonghui, MENG Jigang, HU Yong. Mechanism of influence of notch jet-flow on leakage and rotordynamic characteristics of pocket damper seals[J]. Journal of Aerospace Power, 2022, 37(2): 308-319. doi: 10.13224/j.cnki.jasp.20210021

凹槽射流对袋型阻尼密封泄漏特性与动力特性影响机理

doi: 10.13224/j.cnki.jasp.20210021
基金项目: 国家自然科学基金(52075346,51675351); 辽宁省自然科学基金(2019-ZD-0236);辽宁省教育厅基础研究项目(JYT2020047)
详细信息
    作者简介:

    郭金道(1998-),男,硕士生,主要研究方向为涡轮机械动密封动力特性。

    通讯作者:

    孙丹(1981-),男,教授,博士,主要从事涡轮机械先进密封技术研究。E-mail:phd_sundan@163.com

  • 中图分类号: V233.5

Mechanism of influence of notch jet-flow on leakage and rotordynamic characteristics of pocket damper seals

  • 摘要: 采用非定常动网格技术建立了袋型阻尼密封泄漏特性和动力特性多频椭圆涡动求解模型,在验证求解模型准确性的基础上,研究了压比、转速和凹槽位置不同时凹槽射流对袋型阻尼密封泄漏特性与动力特性的影响,分析了袋型阻尼密封轴向与周向的流速和压力分布特性,揭示了凹槽射流对袋型阻尼密封泄漏特性和动力特性的影响机理。研究表明:凹槽射流增强了袋型阻尼密封直通效应,削弱了基本腔室内气流动能的耗散作用,增大了泄漏量,当压比由2增至6.9时,相比无凹槽袋型阻尼密封,有凹槽袋型阻尼密封泄漏量增大11.75%~12.67%。凹槽射流可减小袋型阻尼密封交叉刚度,增大直接阻尼和有效阻尼,且转子低频(频率小于120 Hz)涡动时效果更显著;凹槽射流可抑制下游腔室内气流的周向流动,降低周向压差,使周向压力分布更均匀,提高转子稳定性;凹槽结构参数相同时,基本腔室出口密封齿周向二等分点为最佳凹槽位置,此时袋型阻尼密封具有最小交叉刚度、最大直接阻尼和有效阻尼。

     

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出版历程
  • 收稿日期:  2021-01-16
  • 刊出日期:  2022-02-28

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