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

两级均压刷式密封泄漏流动特性数值研究

张静涵 孙丹 赵欢 徐文峰 慕伟 张杰一

张静涵, 孙丹, 赵欢, 等. 两级均压刷式密封泄漏流动特性数值研究[J]. 航空动力学报, 2025, 40(1):20230114 doi: 10.13224/j.cnki.jasp.20230114
引用本文: 张静涵, 孙丹, 赵欢, 等. 两级均压刷式密封泄漏流动特性数值研究[J]. 航空动力学报, 2025, 40(1):20230114 doi: 10.13224/j.cnki.jasp.20230114
ZHANG Jinghan, SUN Dan, ZHAO Huan, et al. Numerical study on leakage flow characteristics of novel two-stage pressure equalizing brush seal[J]. Journal of Aerospace Power, 2025, 40(1):20230114 doi: 10.13224/j.cnki.jasp.20230114
Citation: ZHANG Jinghan, SUN Dan, ZHAO Huan, et al. Numerical study on leakage flow characteristics of novel two-stage pressure equalizing brush seal[J]. Journal of Aerospace Power, 2025, 40(1):20230114 doi: 10.13224/j.cnki.jasp.20230114

两级均压刷式密封泄漏流动特性数值研究

doi: 10.13224/j.cnki.jasp.20230114
基金项目: 国家自然科学基金(52075346);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:

    张静涵(2000-),女,硕士生,主要从事多级刷式密封性能分析与结构设计。E-mail:18840620028@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 leakage flow characteristics of novel two-stage pressure equalizing brush seal

  • 摘要:

    多级刷式密封存在各级级间压降分配不均衡导致提前失效的问题,提出下游级后挡板开孔的两级均压刷式密封结构,建立三维实体两级均压刷式密封数值计算模型,在验证数值模型准确性基础上,数值分析两级均压刷式密封的泄漏流动特性,研究均压孔结构参数对改进型结构泄漏特性和级间压降均衡性的影响规律。研究结果表明:设有均压孔的两级均压刷式密封较传统结构提高了压降均衡性,且降低了刷式密封摩擦热效应;传统两级刷式密封的压降均衡性系数明显大于两级均压刷式密封,改进型结构的压降均衡性系数较传统结构改善了45.6%~67.9%;均压孔直径从0.2 mm增大至0.8 mm、均压孔高度从3.55 mm增大至8.35 mm与均压孔排数设置为3排时压降均衡性系数分别减小38.5%、7.7%和25.1%;改进型结构泄漏量相比于传统结构略有增大,且泄漏量随均压孔直径的增大而增加,随均压孔高度的提高无明显变化,随均压孔排数的增加而增大。

     

  • 图 1  传统两级刷式密封结构示意图

    Figure 1.  Schematic diagram of traditional two-stage brush seal structure

    图 2  两级均压刷式密封二维结构示意图

    Figure 2.  Two-dimensional structure diagram of the two-stage pressure equalizing brush seal

    图 3  两级均压刷式密封数值求解模型

    Figure 3.  Numerical solution model of two-stage pressure equalizing brush seal

    图 4  网格划分示意图

    Figure 4.  Diagram of grid division

    图 5  网格无关性验证

    Figure 5.  Grid independence verification

    图 6  边界条件

    Figure 6.  Boundary conditions

    图 7  刷式密封泄漏特性实验装置

    Figure 7.  Brush seal leakage characteristic test equipment

    图 8  泄漏量对比验证结果

    Figure 8.  Leakage volume comparison verification results

    图 9  传统结构与改进型结构气流速度分布

    Figure 9.  Airflow velocity distribution of traditional structure and improved structure

    图 10  传统结构与改进型结构轴向压力分布

    Figure 10.  Axial pressure distribution of traditional structure and improved structure

    图 11  传统结构与改进型结构级间压力对比

    Figure 11.  Comparison of pressure between the traditional structure and the improved structure

    图 12  传统结构与改进型结构泄漏量对比

    Figure 12.  Comparison of leakage quantity between traditional structure and improved structure

    图 13  传统结构与改进型结构流场温度分布

    Figure 13.  Temperature distribution of flow field between traditional structure and improved structure

    图 14  均压孔直径对两级刷式密封泄漏特性影响

    Figure 14.  Influence of pressure equalizing holes diameter on leakage characteristics of two-stage brush seal

    图 15  均压孔高度对两级刷式密封泄漏特性影响

    Figure 15.  Influence of pressure equalizing holes height on leakage characteristics of two-stage brush seal

    图 16  均压孔排数对两级刷式密封泄漏特性影响

    Figure 16.  Influence of pressure equalizing holes rows number on leakage characteristics of two-stage brush seal

    图 17  均压孔直径对两级刷式密封级间压降分配影响

    Figure 17.  Effect of pressure equalizing holes diameter on pressure drop distribution between two brush seal stages

    图 18  均压孔直径对压降均衡性系数影响

    Figure 18.  Influence of pressure equalization holes diameter on pressure drop equalization coefficient

    图 19  均压孔高度对两级刷式密封级间压降分配影响

    Figure 19.  Effect of pressure equalizing holes height on pressure drop distribution between two brush seal stages

    图 20  均压孔高度对压降均衡性系数影响

    Figure 20.  Influence of pressure equalization holes height on pressure drop equalization coefficient

    图 21  均压孔排数对两级刷式密封级间压降分配影响

    Figure 21.  Effect of pressure equalizing holes rows on pressure drop distribution between two brush seal stages

    图 22  均压孔排数对压降均衡性系数影响

    Figure 22.  Influence of pressure equalization holes rows on pressure drop equalization coefficient

    表  1  两级均压刷式密封结构参数

    Table  1.   Structural parameters of two-stage pressure equalizing brush seal mm

    结构参数 数值
    前挡板保护高度Hf 8.4
    后挡板保护高度Hb 1.5
    刷丝直径D 0.08
    刷丝排列间距d 0.008
    刷丝束轴向厚度W 1.5
    刷丝束径向长度l 10.4
    前挡板宽度Lf 1.5
    后挡板宽度Lb 2
    级间距Wd 10
    均压孔直径Dj 0.2~0.8
    均压孔高度Hj 3.55~8.35
    下载: 导出CSV
  • [1] 李军,李志刚,张元桥,等. 刷式密封技术的研究进展[J]. 航空发动机,2019,45(2): 74-84. LI Jun,LI Zhigang,ZHANG Yuanqiao,et al. Research progress of brush seal technology[J]. Aeroengine,2019,45(2): 74-84. (in Chinese

    LI Jun, LI Zhigang, ZHANG Yuanqiao, et al. Research progress of brush seal technology[J]. Aeroengine, 2019, 45(2): 74-84. (in Chinese)
    [2] MILLENER P J,EDMUNDS T M. Brush seal with porous upstream side-plate: US5496045[P]. 1996-05-05.
    [3] DINC S,DEMIROGLU M,TURNQUIST N,et al. Fundamental design issues of brush seals for industrial applications[J]. ASME Journal of Turbomachinery,2002,124(2): 293-300. doi: 10.1115/1.1451847
    [4] FLOWE R R. Brush seal development system[C]//AIAA/SAE/ASME/ASEE,26th Joint Propulsion Conference. Orlando Florida: AIAA,1990: 16-18.
    [5] BAYLEY F J,LONG C A. A combined experimental and theoretical study of flow and pressure distributions in a brush seal[J]. Journal of Engineering for Gas Turbines and Power,1993,115(2): 404-410. doi: 10.1115/1.2906723
    [6] 孙丹,杜宸宇,刘永泉,等. 基于ALE流固耦合方法的刷式密封刷丝接触变形特性理论与试验研究[J]. 机械工程学报,2020,56(9): 170-180. SUN Dan,DU Chenyu,LIU Yongquan,et al. Theoretical and experimental investigation on the bristle contact deflections characteristics of brush seals based on ALE fluid-structure interaction method[J]. Journal of Mechanical Engineering,2020,56(9): 170-180. (in Chinese doi: 10.3901/JME.2020.09.170

    SUN Dan, DU Chenyu, LIU Yongquan, et al. Theoretical and experimental investigation on the bristle contact deflections characteristics of brush seals based on ALE fluid-structure interaction method[J]. Journal of Mechanical Engineering, 2020, 56(9): 170-180. (in Chinese) doi: 10.3901/JME.2020.09.170
    [7] DOGU Y,AKSIT M F. Effects of geometry on brush seal pressure and flow fields: Part Ⅰ front plate configurations[J]. Journal of Turbomachinery,2006,128(2): 367-368. doi: 10.1115/1.2101857
    [8] 杜宸宇,孙丹,刘永泉,等. 刷式密封吹下效应诱发机理流固耦合数值研究[J]. 航空动力学报,2021,36(2): 310-319. DU Chenyu,SUN Dan,LIU Yongquan,et al. Numerical investigation on induced mechanism of blow-down effect of brush seals with fluid-structure interaction[J]. Journal of Aerospace Power,2021,36(2): 310-319. (in Chinese

    DU Chenyu, SUN Dan, LIU Yongquan, et al. Numerical investigation on induced mechanism of blow-down effect of brush seals with fluid-structure interaction[J]. Journal of Aerospace Power, 2021, 36(2): 310-319. (in Chinese)
    [9] RABEN M,FRIEDRICHS J,FLEGLER J. Brush seal frictional heat generation-test rig design and validation under steam environment[J]. Journal of Engineering for Gas Turbines and Power,2017,139(3): 032502. doi: 10.1115/1.4034500
    [10] RABEN M,FRIEDRICHS J,HELMIS T,et al. Brush seals used in steam environments-chronological wear development and the impact of different seal designs[J]. Journal of Engineering for Gas Turbines and Power,2016,138(5): 051901. doi: 10.1115/1.4031531
    [11] HENDRICKS R C,GRIFFIN T A,KLINE T R,et al. Relative performance comparison between baseline labyrinth and dual brush compressor discharge seals in a T-700 engine test[C]//Proceedings of ASME 1994 International Gas Turbine and Aeroengine Congress and Exposition. The Hague,Netherlands: ASME,1994: 1-21.
    [12] PUGACHEV A O,DECKNER M. Experimental and theoretical rotor dynamic stiffness coefficients for a three-stage brush seal[J]. Mechanical Systems and Signal Processing,2012,31: 143-154. doi: 10.1016/j.ymssp.2012.03.015
    [13] 邱波,李军,冯增国,等. 两级刷式密封泄漏特性的实验与数值研究[J]. 西安交通大学学报,2013,47(7): 7-12. QIU Bo,LI Jun,FENG Zengguo,et al. Experimental and numerical investigations of the leakage characteristics of two-stage brush seal[J]. Journal of Xi’an Jiaotong University,2013,47(7): 7-12. (in Chinese

    QIU Bo, LI Jun, FENG Zengguo, et al. Experimental and numerical investigations of the leakage characteristics of two-stage brush seal[J]. Journal of Xi’an Jiaotong University, 2013, 47(7): 7-12. (in Chinese)
    [14] 邱波,李军. 刷式密封传热特性研究[J]. 西安交通大学学报,2011,45(9): 94-100. QIU Bo,LI Jun. Investigation on the heat transfer characteristics of brush seals[J]. Journal of Xi’an Jiaotong University,2011,45(9): 94-100. (in Chinese

    QIU Bo, LI Jun. Investigation on the heat transfer characteristics of brush seals[J]. Journal of Xi’an Jiaotong University, 2011, 45(9): 94-100. (in Chinese)
    [15] 李国勤,孙丹,焦忠泽,等. 多级低滞后型刷式密封流动传热特性数值研究[J]. 风机技术,2019,61(5): 56-63. LI Guoqin,SUN Dan,JIAO Zhongze,et al. Numerical study on inter-stage pressure and heat transfer characteristics of multi-stage low hysteresis brush seal[J]. Chinese Journal of Turbomachinery,2019,61(5): 56-63. (in Chinese

    LI Guoqin, SUN Dan, JIAO Zhongze, et al. Numerical study on inter-stage pressure and heat transfer characteristics of multi-stage low hysteresis brush seal[J]. Chinese Journal of Turbomachinery, 2019, 61(5): 56-63. (in Chinese)
    [16] 王凯杰,杨义勇,索双富,等. 两级刷式密封的流动计算与系统参数的配置研究[J]. 润滑与密封,2017,42(10): 43-47. WANG Kaijie,YANG Yiyong,SUO Shuangfu,et al. Analysis on flows of two-stage brush seals and research on configuration of system parameters[J]. Lubrication Engineering,2017,42(10): 43-47. (in Chinese

    WANG Kaijie, YANG Yiyong, SUO Shuangfu, et al. Analysis on flows of two-stage brush seals and research on configuration of system parameters[J]. Lubrication Engineering, 2017, 42(10): 43-47. (in Chinese)
    [17] 文龙,王之栎,丁蕾,等. 双级低滞后刷式密封级间不均衡性分析[J]. 北京航空航天大学学报,2014,40(8): 1154-1159. WEN Long,WANG Zhili,DING Lei,et al. Inter-stage imbalance analysis of two-stage low hysteresis brush seal[J]. Journal of Beijing University of Aeronautics and Astronautics,2014,40(8): 1154-1159. (in Chinese

    WEN Long, WANG Zhili, DING Lei, et al. Inter-stage imbalance analysis of two-stage low hysteresis brush seal[J]. Journal of Beijing University of Aeronautics and Astronautics, 2014, 40(8): 1154-1159. (in Chinese)
    [18] 文龙,王之栎. 双级低滞后刷式密封的温度场分析[J]. 中国新技术新产品,2013(23): 2-4. WEN Long,WANG Zhili. Temperature field analysis of two-stage low hysteresis brush seal[J]. China New Technologies and Products,2013(23): 2-4. (in Chinese

    WEN Long, WANG Zhili. Temperature field analysis of two-stage low hysteresis brush seal[J]. China New Technologies and Products, 2013(23): 2-4. (in Chinese)
    [19] 赵欢,焦忠泽,孙丹,等. 多级刷式密封级间压降分配影响因素数值与实验研究[J]. 航空学报,2020,41(10): 79-91. ZHAO Huan,JIAO Zhongze,SUN Dan,et al. Numerical and experimental research on interstage pressure drop distribution affecting factors of multi-stage brush seals[J]. Acta Aeronautica et Astronautica Sinica,2020,41(10): 79-91. (in Chinese

    ZHAO Huan, JIAO Zhongze, SUN Dan, et al. Numerical and experimental research on interstage pressure drop distribution affecting factors of multi-stage brush seals[J]. Acta Aeronautica et Astronautica Sinica, 2020, 41(10): 79-91. (in Chinese)
    [20] 赵欢,李业隆,孙丹,等. 各级差异化多级刷式密封级间压降均衡性数值与实验研究[J]. 航空动力学报,2022,37(5): 934-945. ZHAO Huan,LI Yelong,SUN Dan,et al. Numerical and experimental investigation on interstage pressure drop equalization of differential multi-stage brush seals[J]. Journal of Aerospace Power,2022,37(5): 934-945. (in Chinese

    ZHAO Huan, LI Yelong, SUN Dan, et al. Numerical and experimental investigation on interstage pressure drop equalization of differential multi-stage brush seals[J]. Journal of Aerospace Power, 2022, 37(5): 934-945. (in Chinese)
    [21] 张国强,孙丹,焦忠泽,等. 两级刷式密封流动传热特性数值与实验研究[J]. 风机技术,2020,62(2): 44-52. ZHANG Guoqiang,SUN Dan,JIAO Zhongze,et al. Numerical and experimental research on heat transfer characteristics of two-stage brush seal flow[J]. Chinese Journal of Turbomachinery,2020,62(2): 44-52. (in Chinese

    ZHANG Guoqiang, SUN Dan, JIAO Zhongze, et al. Numerical and experimental research on heat transfer characteristics of two-stage brush seal flow[J]. Chinese Journal of Turbomachinery, 2020, 62(2): 44-52. (in Chinese)
  • 加载中
图(22) / 表(1)
计量
  • 文章访问数:  55
  • HTML浏览量:  22
  • PDF量:  18
  • 被引次数: 0
出版历程
  • 收稿日期:  2023-02-28
  • 网络出版日期:  2024-06-07

目录

    /

    返回文章
    返回