Volume 37 Issue 1
Jan.  2022
Turn off MathJax
Article Contents
Article Navigation >  Journal of Aerospace Power  > 2022  >  37(1): 114-123
BAI Lu, SUN Dan, ZHAO Huan, XIAO Zhonghui, MENG Jigang, HU Yong. Numerical study on leakage and dynamic characteristics of circumferentially divergent pocket damping seal[J]. Journal of Aerospace Power, 2022, 37(1): 114-123. doi: 10.13224/j.cnki.jasp.20210076
Citation: BAI Lu, SUN Dan, ZHAO Huan, XIAO Zhonghui, MENG Jigang, HU Yong. Numerical study on leakage and dynamic characteristics of circumferentially divergent pocket damping seal[J]. Journal of Aerospace Power, 2022, 37(1): 114-123. doi: 10.13224/j.cnki.jasp.20210076
shu

Numerical study on leakage and dynamic characteristics of circumferentially divergent pocket damping seal

doi: 10.13224/j.cnki.jasp.20210076
  • 1.

    Key Laboratory of Advanced Measurement and Test Technique for Aviation Propulsion System，Liaoning Province，School of Aero-engine，Shenyang Aerospace University，Shenyang 110136，China

  • 2.

    Collaborative Innovation Center of Machine Manufacturing in Liaoning，Shenyang Blower Works Group Company Limited，Shenyang 110142，China

  • Received Date: 2021-02-19
  • Publish Date: 2022-01-28
    Abstract
  • A type of circumferentially divergent pocket damping seal structure was proposed，the pocket damping seal multi-frequency elliptical vortex solution model was established，and based on the experimental verification of the accuracy of the pocket damping seal solution model，the effects of the inlet and outlet pressure ratio and eccentricity on the leakage characteristics and dynamic characteristics of pocket damping seal were studied，and the rotor stability of the pocket damping seals was analyzed.The research results showed that the difference in leakage between two pocket damping seals was 0.89% on average，and the leakage characteristics of these two were equivalent.The traditional pocket damping seal had a large circumferential pressure difference in each chamber when the rotor was eccentric，while the pressure distribution in each chamber of the circumferentially divergent pocket damping seal was basically uniform； the tangential airflow force of these two was opposite to the direction of the rotor whirl，and both suppressed the vortex of the rotor，and the tangential air force of the circumferentially divergent pocket damping seal was 2.29 times that of the traditional pocket damping seal；the average effective stiffness of the circumferentially divergent pocket damping seal was 1.29 times that of the traditional pocket damping seal，the circumferentially divergent pocket damping seal was more conducive to the stability of the rotor system.

     

    • FullText(HTML)
  • loading
    • References(20)
  • [1]
    罗跃纲,王鹏飞,徐昊,等.密封-转子系统气流激振问题数值仿真[J].航空动力学报,2019,34（9）:1857-1865.
    [2]
    孙丹,卢江,艾延廷,等.偏心密封动力特性分析与新型自同心密封研究[J].推进技术,2018,39（9）:2075-2084.
    [3]
    孙丹,王双,艾延廷,等.负错位密封静力与动力特性的数值研究[J].航空动力学报,2017,32（4）:791-799.
    [4]
    胡东旭,贾力,杨立新.篦齿封严泄漏特性的实验[J].航空动力学报,2014,29（3）:549-555.
    [5]
    马纲,栗秀花,沈心敏,等.柱面气膜密封界面结构与性能分析[J].航空动力学报,2011,26（11）:2610-2616.
    [6]
    王虹,洪杰,马艳红.用于转子系统的气膜密封阻尼结构稳态特性[J].航空动力学报,2012,27（1）:190-197.
    [7]
    VANCE J M,LI J M.Test results of a new damper seal for vibration reduction in turbomachinery[J].Journal of Engineering for Gas Turbines and Power,1996,118（4）:843-846.
    [8]
    ERTAS B,GAMAL A,VANCE J.Rotordynamic force coefficients of pocket damper seals[R].Reno,NV,US:ASME Turbo Expo:Power for Land,Sea,and Air,2006.
    [9]
    YANG J,LUIS S A,LU X L.On the leakage and dynamic force coefficients of a novel stepped shaft pocket damper seal:experimental and numerical verification[J].Journal of Engineering for Gas Turbines and Power,2021,143（3）:031002.1-031002.12.
    [10]
    VANCE J M,SCHULTZ R R.New damper seal for tur-bomachinery[R].Albuquerque,NM,US:the 14th Biennial ASME Design Technical Conference on Mechanical Vibration and Noise,1993.
    [11]
    CHILDS D W,WADE J.Rotordynamic-coefficient and leakage characteristics for hole-pattern-stator annular gas seals-measurements versus predictions[J].Journal of Tribology,2004,126（2）:326-333.
    [12]
    GRIEBEL C.Impact analysis of pocket damper seal geometry variations on leakage performance and rotordynamic force coefficients using computational fluid dynamics[J].Gas Turbines Power,2019,141（4）:041024.1-041024.9.
    [13]
    张万福,马凯,潘渤,等.基于变厚度挡板的新型渐扩/渐缩袋型阻尼密封动力特性研究[J].热能动力工程,2020,35（5）:24-33.
    [14]
    孙丹,王平,赵欢,等.新型浮动式收敛袋型密封自适应同心性能数值与实验研究[J].航空学报,2020,41（3）:325-335.
    [15]
    李志刚,陈尧兴,李军.高偏心率下旋转密封泄漏特性和静态动力特性研究[J].西安交通大学学报,2017,51（7）:1-7.
    [16]
    陈陆淼,秦朝烨,褚福磊.航空发动机转子篦齿封严诱导的气流激振力分析[J].推进技术,2016,37（3）:527-533.
    [17]
    曹浩,杨建刚,郭瑞,等.密封动力特性系数试验识别方法及影响因素分析[J].机械工程学报,2011,47（9）:85-89.
    [18]
    王双.旋转机械滑动轴承与密封结构流体动力特性研究[D].沈阳：沈阳航空航天大学,2016.
    [19]
    YAN Xin,HE Kun,LI Jun,et al.A generalized prediction method for rotordynamic coefficients of annular gas seals[J].Journal of Engineering for Gas Turbines and Power,2015,137（9）:092506.1-092506.12.
    [20]
    MEHTA N J,CHILDS D W.Measured comparison of leakage and rotordynamic characteristics for a slanted-tooth and a straight-tooth labyrinth seal[J].Journal of Engineering for Gas Turbines and Power,2014,136（1）:012501.1-012501.11.
    • Relative Articles
    • Supplements(0)
    • Cited By
  • 加载中

Catalog

    通讯作者: 陈斌, bchen63@163.com
    • 1. 

      沈阳化工大学材料科学与工程学院 沈阳 110142

    1. 本站搜索
    2. 百度学术搜索
    3. 万方数据库搜索
    4. CNKI搜索
    Get Citation
    PDF(2329.0KB)
    XML

    Article Metrics

    Article views (424) PDF downloads(50) Cited by()
    Proportional views
    Related

    Copyright © 《Journal of Aerospace Power》 All Rights Reserved.

    Supported by: Beijing Renhe Information Technology Co., Ltd.  

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return