[1]许万军,杨建刚.附带共振腔的改进型迷宫密封性能分析[J].东南大学学报(自然科学版),2015,45(6):1075-1080.[doi:10.3969/j.issn.1001-0505.2015.06.009]
 Xu Wanjun,Yang Jiangang.Performance analysis of improved labyrinth seal with resonance cavity[J].Journal of Southeast University (Natural Science Edition),2015,45(6):1075-1080.[doi:10.3969/j.issn.1001-0505.2015.06.009]
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附带共振腔的改进型迷宫密封性能分析()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
45
期数:
2015年第6期
页码:
1075-1080
栏目:
能源与动力工程
出版日期:
2015-11-20

文章信息/Info

Title:
Performance analysis of improved labyrinth seal with resonance cavity
作者:
许万军杨建刚
东南大学火电机组振动国家工程研究中心, 南京 210096
Author(s):
Xu Wanjun Yang Jiangang
National Engineering Research Center of Turbogenerator Vibration, Southeast University, Nanjing 210096, China
关键词:
密封 亥姆霍兹共振腔 流体激振 消声能力
Keywords:
seal Helmholtz resonance cavity flow induced vibration noise reduction performance
分类号:
TK263
DOI:
10.3969/j.issn.1001-0505.2015.06.009
摘要:
为了提高迷宫密封的性能,受亥姆霍兹共振腔启发,提出了一种改进型迷宫密封.在传统迷宫密封腔上方设计第2个膨胀腔,使气流在腔内进行二次膨胀,增加腔内气流的速度耗散.应用数值方法研究改进型密封的泄漏特性、动力特性和声学特性,并与迷宫密封进行比较.研究结果表明:改进型密封内的气流形成了2个漩涡,使气流膨胀更充分,密封泄漏量降低;改进型密封腔的容积增大,降低了低频切向气流力,提高了密封在低频涡动区内的稳定性;受亥姆霍兹共振腔声学效应的影响,改进型密封提高了对低频噪声的抑制能力.
Abstract:
To raise the performance of labyrinth seal, an improved labyrinth seal inspired by Helmholtz resonance cavity is proposed. A second expansion cavity is designed and placed on the top of the traditional labyrinth seal cavity, which forces the airflow to expand once again inside the cavity and increases the velocity dissipation of the airflow. The leakage performance, dynamic and acoustic characteristics of the improved seal are analyzed numerically and compared with the traditional labyrinth seal. The results show that the airflow inside the improved seal forms two vortices. The airflow expands sufficiently and the seal leakage reduces. The volume of the improved seal cavity increases, leading to the decrease of the low-frequency tangential flow force and the improvement of the seal stability in the low-frequency whirl zone. Due to the acoustic behavior of Helmholtz resonance cavity, the reduction performance on low-frequency noise of the improved seal is enhanced.

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备注/Memo

备注/Memo:
收稿日期: 2015-06-10.
作者简介: 许万军(1985—),男,博士生;杨建刚(联系人),男,博士,教授,博士生导师,jgyang@seu.edu.cn.
基金项目: 国家自然科学基金资助项目(51275088).
引用本文: 许万军,杨建刚.附带共振腔的改进型迷宫密封性能分析[J].东南大学学报:自然科学版,2015,45(6):1075-1080. [doi:10.3969/j.issn.1001-0505.2015.06.009]
更新日期/Last Update: 2015-11-20