Analysis of floating foil gas seal performance based on bump foil deformation

doi:10.11949/0438-1157.20220119

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	Analysis of floating foil gas seal performance based on bump foil deformation
	Xu, Jie; Yu, Shurong; Ding, Xuexing; Jiang, Haitao; Ding, Junhua
刊名	Huagong Xuebao/CIESC Journal
	2022-05-01
卷号	73 期号:5 页码:2083-2093
关键词	Aircraft engines Deformation Friction Gases Iterative methods Seals Structural design Coulomb's frictions Dynamic pressure groove Dynamic pressures Elastic foils Finite-difference methods Gas film lubrication Gas films Sealing characteristics Small disturbance method Small disturbances
ISSN号	0438-1157
DOI	10.11949/0438-1157.20220119
英文摘要	In order to ensure the stable operation of the dynamic sealing of aero-engines, for the floating foil gas film seal, the bump foil stiffness model considering the Coulomb friction is adopted, and the central difference method and the over-relaxation iterative method are used to couple the foil deformation equation, pressure control equation and gas film thickness control equation. And the small disturbance method, combined with the balance between pressure and foil deformation, obtain the flow field distribution of the wedge-shaped lubricating gas film, and the influence of working condition parameters, foil structure parameters and linear dynamic pressure groove distribution position on the static and dynamic characteristics of the seal is analyzed. The research results show that: Benefiting from the deformation of the sealing surface, the floating foil gas film seal can independently adjust the gas film gap according to operating conditions; The gas film floating force and leakage of the inlet straight groove are bigger than those of the middle straight groove; The sealing characteristics are closely related to the gas film pressure and the sealing gap, but they are little affected by the Coulomb friction effect; Both the Coulomb friction effect and the thickened foil increase the rigidity of the foil to a certain extent, making the sealing surface "rigid"; The comprehensive performance of the floating foil air-film seal in the high-speed service environment is good. The research results laid a theoretical foundation for the structural design and experimental testing of the floating foil gas film seal in the future. © 2022, Editorial Board of CIESC Journal. All right reserved.
语种	中文
出版者	Materials China
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/158441]
专题	石油化工学院
作者单位	College of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou; 730050, China
推荐引用方式 GB/T 7714	Xu, Jie,Yu, Shurong,Ding, Xuexing,et al. Analysis of floating foil gas seal performance based on bump foil deformation[J]. Huagong Xuebao/CIESC Journal,2022,73(5):2083-2093.
APA	Xu, Jie,Yu, Shurong,Ding, Xuexing,Jiang, Haitao,&Ding, Junhua.(2022).Analysis of floating foil gas seal performance based on bump foil deformation.Huagong Xuebao/CIESC Journal,73(5),2083-2093.
MLA	Xu, Jie,et al."Analysis of floating foil gas seal performance based on bump foil deformation".Huagong Xuebao/CIESC Journal 73.5(2022):2083-2093.