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浅槽动压整体式浮环密封静力与动力特性数值研究

赵欢 姜金裕 孙丹 王双 李延鹏

赵欢, 姜金裕, 孙丹, 等. 浅槽动压整体式浮环密封静力与动力特性数值研究[J]. 航空动力学报, 2024, 39(9):20220697 doi: 10.13224/j.cnki.jasp.20220697
引用本文: 赵欢, 姜金裕, 孙丹, 等. 浅槽动压整体式浮环密封静力与动力特性数值研究[J]. 航空动力学报, 2024, 39(9):20220697 doi: 10.13224/j.cnki.jasp.20220697
ZHAO Huan, JIANG Jinyu, SUN Dan, et al. Numerical study on static and dynamic characteristics of an integral floating ring seal with shallow groove dynamic pressure[J]. Journal of Aerospace Power, 2024, 39(9):20220697 doi: 10.13224/j.cnki.jasp.20220697
Citation: ZHAO Huan, JIANG Jinyu, SUN Dan, et al. Numerical study on static and dynamic characteristics of an integral floating ring seal with shallow groove dynamic pressure[J]. Journal of Aerospace Power, 2024, 39(9):20220697 doi: 10.13224/j.cnki.jasp.20220697

浅槽动压整体式浮环密封静力与动力特性数值研究

doi: 10.13224/j.cnki.jasp.20220697
基金项目: 国家自然科学基金(52075346); 先进航空动力创新工作站(依托中国航空发动机研究院设立)项目(HKC2020-02-030); 中国航空发动机集团产学研合作项目(HFZL2021CXY012)
详细信息
    作者简介:

    姜金裕(1998-),男,硕士生,主要研究方向为密封静力与动力特性。E-mail:18842822199@163.com

    通讯作者:

    孙丹(1981-),男,教授,博士,主要从事航空发动机先进密封技术研究。E-mail:phd_sundan@163.com

  • 中图分类号: V233.5

Numerical study on static and dynamic characteristics of an integral floating ring seal with shallow groove dynamic pressure

  • 摘要:

    建立了浅槽动压整体式浮环密封静力与动力特性多频椭圆涡动求解模型,在验证数值计算方法准确性的基础上,分析了无槽、矩形槽、螺旋槽及T型槽4种结构整体式浮环密封的静力与动力特性,研究了不同结构与工况参数下的整体式浮环密封泄漏量、浮升力以及动力特性的变化规律,分析了槽型对整体式浮环密封转子稳定性的影响,揭示了动压槽型对整体式浮环密封动力特性的影响机理。研究结果表明,泄漏量与浮升力随着偏心率的增加而增大,相较于无槽浮环密封,矩形槽泄漏量最大,T型槽的浮升力最大,为无槽浮升力的434.7%;在同一涡动频率下,矩形槽的有效阻尼最大且为正值,切向气流力与转子涡动方向相反,从而抑制转子的涡动,提高转子稳定。

     

  • 图 1  整体式浮环密封装置

    Figure 1.  Integral floating ring seal device

    图 2  整体式浮环密封槽型结构

    Figure 2.  Integral floating ring seal groove structures

    图 3  椭圆轨迹涡动模型

    Figure 3.  Vortex model of elliptical trajectory

    图 4  整体式浮环密封三维结构示意图

    Figure 4.  Three-dimensional structure diagram of the integral floating ring seal

    图 5  网格示意图

    Figure 5.  Grid diagram

    图 6  数值计算结果对比验证

    Figure 6.  Comparison and verification of numerical results

    图 7  浮环密封压力分布云图

    Figure 7.  Pressure distribution contour of floating ring seal

    图 8  浮环密封压力差大小柱状图

    Figure 8.  Pressure difference bar diagram of floating ring seal

    图 9  泄漏量随不同工况变化图

    Figure 9.  Variation of leakage with different working conditons

    图 10  整体式浮环密封浮环受力分析图

    Figure 10.  Force analysis diagram of integral floating ring seal floating ring

    图 11  浮升力随不同工况变化图

    Figure 11.  Diagram of lifting force variation with different working conditions

    图 12  直接刚度变化图

    Figure 12.  Variation diagram of direct stiffness

    图 13  交叉刚度变化图

    Figure 13.  Variation diagram of cross stiffness

    图 14  直接阻尼变化图

    Figure 14.  Variation diagram of direct damping

    图 15  交叉阻尼变化图

    Figure 15.  Variation diagram of cross damping

    图 16  有效阻尼的变化图

    Figure 16.  Variation diagram of effective damping

    图 17  有效刚度变化图

    Figure 17.  Variation diagram of effective stiffness

    图 18  整体式浮环密封转子面流体激振力矢量图

    Figure 18.  Fluid excitation force vector diagram of integral floating ring seal rotor surface

    表  1  密封模型几何尺寸

    Table  1.   Dimension of seal model

    参数 数值
    转子直径ϕr/mm 53.0
    浮环内表面直径ϕf/mm 53.2
    密封间隙h/mm 0.10
    密封环长度L/mm 8.0
    密封环高度E/mm 4.5
    槽种类/种 3
    槽数量/个 16
    槽深τ/mm 0.10
    槽长l/mm 5.50
    下载: 导出CSV

    表  2  边界条件

    Table  2.   Boundary conditions

    参数 数值及说明
    转速/(r/min) 0~40000
    壁面属性 无滑移绝热
    工质 理想空气
    湍流模型 标准k-ε
    涡动模型 多频椭圆涡动
    进口压力/MPa 0.3~0.7
    出口压力/MPa 0.1
    总温/K 298
    偏心率 0~0.7
    涡动频率/Hz 40~320
    下载: 导出CSV
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  • 收稿日期:  2022-09-16
  • 网络出版日期:  2023-12-26

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