Numerical simulation on seal-rotor system with airflow induced vibration

被引：0
|
作者：
Luo Y. [1 ,2 ]
Wang P. [1 ,2 ]
Xu H. [1 ,2 ]
Wang C. [1 ,2 ]
Jia H. [1 ,2 ]
机构：
[1] School of Mechanical and Electronic Engineering, Dalian Minzu University, Dalian, 116600, Liaoning
[2] Key Laboratory of Intelligent Perception and Advanced Control of State Ethnic Affairs Commission, Dalian Minzu University, Dalian, 116600, Liaoning
来源：
Hangkong Dongli Xuebao/Journal of Aerospace Power | 2019年 / 34卷 / 09期
关键词：
Airflow induced vibration; Combined frequency; Finite element; Labyrinth seal; Rotor system;
D O I：
10.13224/j.cnki.jasp.2019.09.001
中图分类号：
学科分类号：
摘要：
For the diagnosis of airflow induced vibration fault in the seal, the dynamic model of seal-rotor system was established based on finite element method and Muzynska seal fluid force model. The airflow induced vibration instability law and dynamic characteristics from run-up and run-down processes were studied by numerical simulation method. And the different eccentricities' effects during the case of variable speed and steady speed were also analyzed. The result showed that natural frequency of rotor system was increased by the airflow excitation force, and the amplitude was reduced in resonance zone. The frequency locking phenomenon and combination frequency characteristics appeared by airflow vibration with the speed increase. The phenomenon of hysteresis under run-down conditions was not obvious because of the strong gas flow. Only frequency locking occurred when the eccentricity was small, the combined frequency was observed and enriched with eccentricity increase. The airflow vibration frequency was enhanced and changed suddenly by increasing eccentricity in the process of constant rotating speed. © 2019, Editorial Department of Journal of Aerospace Power. All right reserved.
引用
收藏
页码：1857 / 1865
页数：8
相关论文
共 17 条
  • [1] He H., Jing J., Dynamic model of a nonlinear rotor-seal system, Journal of Vibration and Shock, 33, 10, pp. 73-76, (2014)
  • [2] Luo Y., Wang P., Xu H., Et al., Review and prospect on the research of the labyrinth seal-rotor system, Journal of Dalian Minzu University, 21, 1, pp. 6-14, (2019)
  • [3] Yan X., He K., Li J., Et al., Numerical techniques for computing nonlinear dynamic characteristic of rotor-seal system, Journal of Mechanical Science and Technology, 28, 5, pp. 1727-1740, (2014)
  • [4] Kirk R.G., Guo Z., Influence of leak path friction on labyrinth seal inlet swirl, Tribology Society of Tribologists and Lubrication Engineers, 52, 2, pp. 139-145, (2009)
  • [5] Hirano T., Guo Z., Kirk R.G., Application of computational fluid dynamics analysis for rotating machinery: Part Ⅱ labyrinth seal analysis, Transactions, 127, 4, pp. 820-826, (2005)
  • [6] Cangioli F., Chatterton S., Pennacchi P., Et al., Thermo-elasto bulk-flow model for labyrinth seals in steam turbines, Tribology International, 119, 2, pp. 359-371, (2018)
  • [7] Subramanian S., Sekhar A.S., Prasad B.V.S.S.S., Rotordynamic characteristics of rotating labyrinth gas turbine seal with centrifugal growth, Tribology International, 97, 2, pp. 349-359, (2016)
  • [8] Sun D., Wang S., Ai Y., Et al., Numerical study on static and dynamic characteristics, Journal of Aerospace Power, 32, 4, pp. 791-799, (2017)
  • [9] Liu X., Zhang G., Li C., Et al., Research on gas leakage pneumatic thermodynamic behavior in the radial labyrinth of scroll compressor, Journal of Mechanical Engineering, 51, 20, pp. 201-207, (2015)
  • [10] Wang W., Liu Y., Jiang P., Numerical investigation on influence of real gas properties on nonlinear behavior of labyrinth seal-rotor system, Applied Mathematics and Computation, 263, pp. 12-24, (2015)
12