留言板

尊敬的读者、作者、审稿人, 关于本刊的投稿、审稿、编辑和出版的任何问题, 您可以本页添加留言。我们将尽快给您答复。谢谢您的支持!

姓名
邮箱
手机号码
标题
留言内容
验证码

反旋流对梳齿密封动力特性影响机理及有效性

张乃丹 张万福 周庆辉 顾乾磊 李春

张乃丹, 张万福, 周庆辉, 等. 反旋流对梳齿密封动力特性影响机理及有效性[J]. 航空动力学报, 2024, 39(7):20220479 doi: 10.13224/j.cnki.jasp.20220479
引用本文: 张乃丹, 张万福, 周庆辉, 等. 反旋流对梳齿密封动力特性影响机理及有效性[J]. 航空动力学报, 2024, 39(7):20220479 doi: 10.13224/j.cnki.jasp.20220479
ZHANG Naidan, ZHANG Wanfu, ZHOU Qinghui, et al. Influence of shunt injection on dynamic characteristics of labyrinth seals and its effectiveness analysis[J]. Journal of Aerospace Power, 2024, 39(7):20220479 doi: 10.13224/j.cnki.jasp.20220479
Citation: ZHANG Naidan, ZHANG Wanfu, ZHOU Qinghui, et al. Influence of shunt injection on dynamic characteristics of labyrinth seals and its effectiveness analysis[J]. Journal of Aerospace Power, 2024, 39(7):20220479 doi: 10.13224/j.cnki.jasp.20220479

反旋流对梳齿密封动力特性影响机理及有效性

doi: 10.13224/j.cnki.jasp.20220479
基金项目: 国家自然科学基金(51875361); 上海市自然科学基金(20ZR1439200)
详细信息
    作者简介:

    张乃丹(1999-),女,硕士生,研究方向为透平机械密封动力学

  • 中图分类号: V219;TK263

Influence of shunt injection on dynamic characteristics of labyrinth seals and its effectiveness analysis

  • 摘要:

    对比分析了不同预旋比下反旋流装置对梳齿密封各腔室内压力、周向流速、周向旋流增长率及动力特性系数,对反旋流梳齿密封的有效性进行定量分析与判别。研究表明:反旋流装置对密封周向流动有较强的抑制作用,且对各腔室压力有不同影响,其中对C3~C6腔室压力作用效果较明显;引入周向旋流增长率衡量反旋流装置作用效果,添加反旋流装置后,密封周向旋流增长率沿泄漏方向降低至C8腔室,在C9腔室处略有回升,无反旋流密封基本保持不变。添加反旋流喷嘴使C3~C6腔室直接阻尼增大,且各腔室交叉刚度均减小,各腔室有效阻尼提高,总有效阻尼增大稳定性增强。预旋比使C1~C2腔室的直接阻尼有显著变化。添加反旋流喷嘴后,腔室交叉刚度在高预旋比下减小更多,有效阻尼受预旋影响较小,反旋流对进口正预旋有较好抑制作用。

     

  • 图 1  转子椭圆涡动示意图

    Figure 1.  Rotor whirling orbit schematic

    图 2  反旋流梳齿密封几何模型

    Figure 2.  Geometry model of the shunt injection labyrinth seal

    图 3  反旋流梳齿密封网格分布

    Figure 3.  Grid distribution of the shunt injection labyrinth seal

    图 4  模拟数值计算与实验结果对比

    Figure 4.  Comparison of simulated numerical calculations and experimental results

    图 5  密封间隙处沿轴向的周向速度(λ=0.45)

    Figure 5.  Circumferential velocity along the axial direction at the seal gap (λ=0.45)

    图 6  腔室C1-2的周向压力和速度场

    Figure 6.  Circumferential pressure and velocity fields of chamber C1-2

    图 7  不同腔室子午面处周向速度云图

    Figure 7.  Velocity contours of a section in different cavities

    图 8  不同腔室周向压力

    Figure 8.  Circumferential pressure of different cavities

    图 9  不同工况下各腔室周向压差

    Figure 9.  Circumferential pressure difference under different operating conditions

    图 10  周向旋流增长率

    Figure 10.  Circumferential swirling flow growth rate

    图 11  不同密封腔室直接阻尼

    Figure 11.  Direct damping in different seal cavity

    图 12  总直接阻尼

    Figure 12.  Total direct damping

    图 13  不同密封腔室内交叉刚度

    Figure 13.  Cross-coupled stiffness in different seal cavity

    图 14  总交叉刚度

    Figure 14.  Total cross-coupled stiffness

    图 15  不同密封腔室内有效阻尼

    Figure 15.  Effective damping in different seal cavity

    图 16  总有效阻尼

    Figure 16.  Total effective damping

    表  1  反旋流梳齿密封几何尺寸

    Table  1.   Dimensions of the shunt injection labyrinth seal mm

    参数数值
    转子直径d60
    密封间隙Cr0.15
    密封腔室底部宽度w13.8
    密封齿尖宽度w20.25
    密封腔底部弧形半径R1.25
    腔室深度h3.3
    反旋流孔边长s3.0
    下载: 导出CSV

    表  2  计算工况参数

    Table  2.   Calculation condition parameters

    计算工况参数设置
    湍流模型标准k-ε
    进口温度Tin/K298
    进口压力pin/MPa0.5
    出口压力pout/MPa0.1
    反旋流喷嘴压力pSI/MPa0.5
    转子转速ω/(r/min)6000
    涡动频率Ωi/Hz20, 40, ···, 260, 280
    涡动幅值/mma=0.001,b=0.0005
    下载: 导出CSV

    表  3  网格无关性验证

    Table  3.   Grid-independent verification

    网格数/104气流力相对误差
    平均值/%
    泄漏量
    相对误差/%
    1481.310.153
    2480.310.118
    3680.210.047
    42800
    下载: 导出CSV
  • [1] ROSENBERG C. Investigating aerodynamics transverse force in labyrinth seals in cases involving totor eccentricity[J]. Translated from Energy Mashinostrojohic,1974,8(27): 15-17.
    [2] 刘卫华,林丽,朱高涛. 迷宫密封机理的研究现状及其展望[J]. 流体机械,2007,35(2): 35-39.

    LIU Weihua,LIN Li,ZHU Gaotao. Current situation of the research and development of the mechanism of labyrinth seal[J]. Fluid Machinery,2007,35(2): 35-39. (in Chinese)
    [3] SCHARRER J K. Rotordynamic coefficients for stepped labyrinth gas seals[J]. Journal of Tribology,1989,111(1): 101-107. doi: 10.1115/1.3261858
    [4] 高光藩,张牢牢. 迷宫密封性能影响因素分析[J]. 风机技术,1997,39(6): 17-21.

    GAO Guangfan,ZHANG Laolao. Analysis to the affecting factors for labyrinth seal performance[J]. Chinese Journal of Turbomachinery,1997,39(6): 17-21. (in Chinese)
    [5] 秦鹏博, 张万福, 曹浩, 等. 偏心迷宫密封动静特性研究[J]. 摩擦学学报, 2020, 40(6): 735-745.

    QIN Pengbo, ZHANG Wanfu, CAO Hao, et al. Static and dynamic characteristics of eccentric labyrinth seals[J]. Tribology, 2020, 40(6): 735-745. (in Chinese)
    [6] 顾乾磊,张万福,潘渤,等. 预旋对迷宫密封动静特性影响研究[J]. 热能动力工程,2020,35(6): 37-44.

    GU Qianlei,ZHANG Wanfu,PAN Bo,et al. Effect of pre-swirl on static and dynamic characteristics of labyrinth seals[J]. Journal of Engineering for Thermal Energy and Power,2020,35(6): 37-44. (in Chinese)
    [7] KIRK G,GAO Rui. Influence of preswirl on rotordynamic characteristics of labyrinth seals[J]. Tribology Transactions,2012,55(3): 357-364. doi: 10.1080/10402004.2012.656880
    [8] WANG Qingfeng,HE Lidong. Effects of four types of pre-swirls on the leakage, flow field, and fluid-induced force of the rotary straight-through labyrinth gas seal[J]. Chinese Journal of Mechanical Engineering,2019,32(1): 1-15. doi: 10.1186/s10033-018-0313-7
    [9] MUSZYNSKA A, FRANKLIN W D, BENTLY D E. Rotor active “anti-swirl” control[J]. Journal of Vibration and Acoustics, 1988, 110(2): 143-150.
    [10] CHILDS D W,MCLEAN J E,ZHANG Min,et al. Rotordynamic performance of a negative-swirl brake for a tooth-on-stator laby-rinth seal[J]. Journal of Engineering for Gas Turbines and Power,2016,138(6): 062505. doi: 10.1115/1.4031877
    [11] 孙丹,王双,艾延廷,等. 阻旋栅对密封静力与动力特性影响的数值分析与实验研究[J]. 航空学报,2015,36(9): 3002-3011.

    SUN Dan,WANG Shuang,AI Yanting,et al. Numerical and experimental research on performance of swirl brakes for the static and dynamic characteristics of seals[J]. Acta Aeronautica et Astronautica Sinica,2015,36(9): 3002-3011. (in Chinese)
    [12] 吴可欣,张万福,曹浩,等. 阻旋栅对梳齿密封动静特性影响研究[J]. 摩擦学学报,2020,40(5): 647-655.

    WU Kexin,ZHANG Wanfu,CAO Hao,et al. Effects of swirl brakes on static and rotordynamic performance of labyrinth seals[J]. Tribology,2020,40(5): 647-655. (in Chinese)
    [13] BENCKERT H, WACHTER J. Flow induced spring coefficients of labyrinth seals for application in rotor dynamics[C]//Proceedings of Workshop on Rotordynamic Instability Problems in High-Performance Turbomachinery. Houston, USA: NASA, 1980:190-212.
    [14] LI Jiming, CHOUDHURY P D, KUSHNER F. Evaluation of centrifugal compressor stability margin and investigation of antiswirl mechanism[C]//Proceedings of the Thirty-Second Turbomachinery Symposium. College Station, Texas, USA: Texas A & M University System, 2003: 49-57.
    [15] MUSZYNSKA A, BENTLY D E. Anti-swirl arrangements prevent rotor/seal instability[J]. Journal of Vibration and Acoustics, 1989, 111(2): 156-162.
    [16] SOTO E A,CHILDS D W. Experimental rotordynamic coefficient results for (a) a labyrinth seal with and without shunt injection and (b) a honeycomb seal[J]. Journal of Engineering for Gas Turbines and Power,1999,121(1): 153-159. doi: 10.1115/1.2816303
    [17] 沈庆根,李烈荣,潘永密. 迷宫密封中的气流激振及其反旋流措施[J]. 流体机械,1994,22(7): 7-12.

    SHEN Qinggen,LI Lierong,PAN Yongmi. Air flow excitation in labyrinth seal and its anti-swirl measures[J]. Fluid Machinery,1994,22(7): 7-12. (in Chinese)
    [18] KIM N,PARK S Y,RHODE D L. Predicted effects of shunt injection on the rotordynamics of gas labyrinth seals[J]. Journal of Engineering for Gas Turbines and Power,2003,125(1): 167-174. doi: 10.1115/1.1520539
    [19] 何立东. 转子密封系统反旋流抑振的数值模拟[J]. 航空动力学报,1999,14(3): 293-296. doi: 10.3969/j.issn.1000-8055.1999.03.015

    HE Lidong. Numerical simulation of anti-swirl arrangements for suppressing rotor/seal instability[J]. Journal of Aerospace Power,1999,14(3): 293-296. (in Chinese) doi: 10.3969/j.issn.1000-8055.1999.03.015
    [20] 孙丹,王双,艾延廷,等. 反旋流对密封静力与动力特性影响的理论与试验研究[J]. 机械工程学报,2016,52(3): 101-109. doi: 10.3901/JME.2016.03.101

    SUN Dan,WANG Shuang,AI Yanting,et al. Theoretical and experimental research on the performance of anti-swirl flow for the static and dynamic characteristics of seals[J]. Journal of Mechanical Engineering,2016,52(3): 101-109. (in Chinese) doi: 10.3901/JME.2016.03.101
    [21] CHILDS D. Turbomachinery rotordynamics: phenomena, modeling, and analysis[M]. New York: John Wiley & Sons, 1993.
    [22] 张万福,王应飞,张晓斌,等. 基于阻抗法的密封动力特性系数实验识别[J]. 航空学报,2022,43(1): 424719.

    ZHANG Wanfu,WANG Yingfei,ZHANG Xiaobin,et al. Experimental identification for rotordynamic coefficients of labyrinth seal based on impedance method[J]. Acta Aeronautica et Astronautica Sinica,2022,43(1): 424719. (in Chinese)
  • 加载中
图(16) / 表(3)
计量
  • 文章访问数:  43
  • HTML浏览量:  13
  • PDF量:  14
  • 被引次数: 0
出版历程
  • 收稿日期:  2022-07-04
  • 网络出版日期:  2023-09-25

目录

    /

    返回文章
    返回