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

被引：0
|
作者：
Xu J. [1 ]
Yu S. [1 ]
Ding X. [1 ]
Jiang H. [1 ]
Ding J. [1 ]
机构：
[1] College of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou
来源：
Huagong Xuebao/CIESC Journal | 2022年 / 73卷 / 05期
关键词：
Dynamic pressure groove; Elastic foil; Finite difference method; Gas film lubrication; Sealing characteristics; Small disturbance method;
D O I：
10.11949/0438-1157.20220119
中图分类号：
学科分类号：
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.
引用
收藏
页码：2083 / 2093
页数：10
相关论文
共 33 条
  • [1] Leyes R, Fleming W., The History of North American Small Gas Turbine Aircraft Engines, (1999)
  • [2] Camussi R, Bennett G J., Aeroacoustics research in Europe: the CEAS-ASC report on 2019 highlights, Journal of Sound and Vibration, 484, (2020)
  • [3] Ludwig L, Johnson R., Sealing technology for aircraft gas turbine engines, 10th Propulsion Conference, (1974)
  • [4] Wang Q Y, Huang Z B, Meng X H., Air tightness design and verification of aeroengine, Internal Combustion Engine & Parts, 19, pp. 1-3, (2021)
  • [5] Mel'nik V A., Calculation of the characteristics of seals with floating rings, Chemical and Petroleum Engineering, 49, 7, pp. 542-548, (2013)
  • [6] He Q, Huang W F, Hu G Y, Et al., Research status of the film-riding gas seal technologies in aeroengine, Aeroengine, 47, 4, pp. 106-113, (2021)
  • [7] Childs D W, Wade J., Rotordynamic-coefficient and leakage characteristics for hole-pattern-stator annular gas seals-measurements versus predictions, Journal of Tribology, 126, 2, pp. 326-333, (2004)
  • [8] Li H Q, Chen X Q, Zhang J T, Et al., The research on the stochastic dynamics of the aircraft flight attitude, Journal of Aerospace Power, 43, 1, (2022)
  • [9] Chen X Q, Yao W, Ouyang Q., Theory and Application of Uncertainty-based Multidisciplinary Design Optimization for Flight Vehicles, (2013)
  • [10] Liu Z S, Xia P, Zhang G H, Et al., Floating ring seals movement mechanism and its influence on stability of a rotor system, Journal of Vibration and Shock, 35, 9, pp. 110-116, (2016)
1234