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基于反正切函数曲线渐变式孔型阻尼密封泄漏特性与动力特性

徐文峰 鲁文昕 孙丹 赵欢 任国哲 王泽铭

徐文峰, 鲁文昕, 孙丹, 等. 基于反正切函数曲线渐变式孔型阻尼密封泄漏特性与动力特性[J]. 航空动力学报, 2024, 39(X):20230320 doi: 10.13224/j.cnki.jasp.20230320
引用本文: 徐文峰, 鲁文昕, 孙丹, 等. 基于反正切函数曲线渐变式孔型阻尼密封泄漏特性与动力特性[J]. 航空动力学报, 2024, 39(X):20230320 doi: 10.13224/j.cnki.jasp.20230320
XU Wenfeng, LU Wenxin, SUN Dan, et al. Leakage characteristics and dynamic characteristics of tapered hole-pattern damper seal based on arctangent function curve[J]. Journal of Aerospace Power, 2024, 39(X):20230320 doi: 10.13224/j.cnki.jasp.20230320
Citation: XU Wenfeng, LU Wenxin, SUN Dan, et al. Leakage characteristics and dynamic characteristics of tapered hole-pattern damper seal based on arctangent function curve[J]. Journal of Aerospace Power, 2024, 39(X):20230320 doi: 10.13224/j.cnki.jasp.20230320

基于反正切函数曲线渐变式孔型阻尼密封泄漏特性与动力特性

doi: 10.13224/j.cnki.jasp.20230320
基金项目: 国家自然科学基金(52075346);辽宁省“兴辽英才计划”资助项目(XLYC2007077);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:

    徐文峰(1993—),男,讲师,博士,主要从事航空发动机热力学研究。E-mail:xuwf789@163.com

    通讯作者:

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

  • 中图分类号: V233.5

Leakage characteristics and dynamic characteristics of tapered hole-pattern damper seal based on arctangent function curve

  • 摘要:

    为改善孔型阻尼密封泄漏特性,提高转子的稳定性,建立了基于反正切函数曲线渐变式孔型阻尼密封泄漏与动力特性求解模型,通过非定常数值方法研究了不同密封间隙、压比、转速和涡动频率对各间隙形式孔型密封泄漏特性与动力特性的影响,分析了不同间隙形式的泄漏特性与动力特性。结果表明:随着压比逐渐增加,不同形式孔型阻尼密封的泄漏量增加,其中,等间隙的泄漏量增幅最大,反正切函数曲线间隙的泄漏量次之。收敛曲线间隙的泄漏量最小,且较发散曲线间隙的泄漏量小2.31%。随着转速逐渐增加,不同形式孔型阻尼密封的泄漏量增加,其中,曲线间隙的泄漏量较锥形间隙的小,收敛曲线间隙的泄漏量最小,比锥形间隙的泄漏量小15.85%。在压比较大,涡动频率大于120 Hz时,收敛曲线间隙有较小的交叉刚度和较大的直接阻尼,转子系统具有较高的稳定性。在转速增加的情况下,收敛曲线间隙的有效刚度和有效阻尼最大,转子系统的稳定性较其他间隙形状的孔型阻尼密封的稳定性更强。

     

  • 图 1  椭圆涡动模型

    Figure 1.  Elliptical whirling model

    图 2  曲线形间隙孔型阻尼密封示意图

    Figure 2.  Schematic diagram of curved clearance hole type damping seal

    图 3  流体域网格划分

    Figure 3.  Fluid domain meshing

    图 4  泄漏量随网格变化趋势

    Figure 4.  Trend of leakage with grid

    图 5  动力特性求解方法校核

    Figure 5.  Calibration of dynamic characteristic solving method

    图 6  压比对泄漏特性的影响

    Figure 6.  Effect of pressure ratio on leakage characteristics

    图 7  转速对泄漏特性的影响

    Figure 7.  Effect of rotational speed on leakage characteristics

    图 8  子午面流线图

    Figure 8.  Meridian surface flow chart

    图 9  收敛曲线间隙整周压力分布图

    Figure 9.  Clearance integral circumferential pressure distribution of convergence curve

    图 10  不同间隙形状的中轴面压力分布图

    Figure 10.  The axial pressure distribution of different clearance shapes

    图 11  不同间隙的质量流量面平均压力

    Figure 11.  Average mass flow surface pressure for different clearances

    图 12  有效刚度和有效阻尼随频率变化

    Figure 12.  The effective stiffness and effective damping vary with frequency

    图 13  压比不同时有效刚度和有效阻尼随频率变化

    Figure 13.  The effective stiffness and effective damping change with frequency when the pressure ratio is different

    图 14  转速不同时有效刚度和有效阻尼随频率变化

    Figure 14.  The effective stiffness and effective damping change with frequency when the rotational speed is different

    表  1  孔型阻尼密封几何参数

    Table  1.   Bore type damping seal geometry parameters

    参数数值
    密封长度/mm85.7
    转子直径/mm114.34
    密封间隙/mm0.2,0.3,0.2-0.3(y=arctan x
    孔直径/mm3.175
    孔深度/mm3.302
    密封孔数/个2 668
    下载: 导出CSV

    表  2  边界条件

    Table  2.   Boundary conditions

    参数
    转速r/min10000,15000,20200
    入口总压/MPa5,6,7
    出口静压/MPa3.15
    入口温度/℃17.4
    涡动频率/Hz40~320
    湍流模型标准k-$ \varepsilon $
    下载: 导出CSV

    表  3  泄漏特性求解方法校核

    Table  3.   Calibration of leakage characteristics solution method

    求解方式 泄漏量(kg/s) 相对误差/%
    文献[13]结果 0.410 0
    本文结果 0.385 6.09
    下载: 导出CSV

    表  4  不同间隙下的泄漏量

    Table  4.   Leakage under different clearances

    间隙形状 泄漏量/(kg/s)
    等间隙0.2 mm 0.3603
    等间隙0.3 mm 0.6200
    锥形发散间隙 0.5419
    发散曲线 0.4668
    收敛曲线 0.4560
    下载: 导出CSV
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  • 收稿日期:  2023-05-15
  • 网络出版日期:  2024-06-07

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