吴文健,应光耀,魏晨,郑水英
WU Wenjian,YING Guangyao,WEI Chen,ZHENG Shuiying

• 1:国网浙江省电力公司电力科学研究院
• 2:浙江大学

摘要(Abstract)：

随着旋转机械向着高性能和大容量方向发展,迷宫密封引起的气流激振问题日益严重,成为威胁机组安全稳定运行的重大威胁之一。提出一种基于商用CFD软件Fluent的数值计算方法,通过对迷宫密封流场进行模拟计算,得出在不同偏心和不同涡动频率下作用于轴颈面的气体力,进而利用转子动力学理论计算该气体力作用下转子模型的位移,最后使用Fluent软件的UDF动网格技术实现流场分析和转子动力学的耦合计算。
With the development of rotating machinery towards high capability and huge cubage,the airstream excitation caused by fluid in labyrinth seals occurs more and more frequently and becomes one of major threats to operation safety and stability of the units.A numerical computation method is put forward based on the commercial computational fluid dynamics(CFD) software Fluent.The flow field in labyrinth is simulated,and the fluid exciting forces acting on the journal surface under different eccentric and eddy motion frequency are calculated.After that,the displacement of the rotor model under the fluid exciting forces is calculated by using rotor dynamics theories.Finally,field analysis and fluid-structure interaction computation of rotor dynamics are achieved by using UDF mesh-motion technology of Fluent.

关键词(KeyWords)： 迷宫密封;气流激振;Fluent;转子动力学
labyrinth seal;airstream excitation;Fluent;rotor dynamics

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金资助项目(51275452);; 国网浙江省电力公司科技项目(5211DS14005B)

作者(Author): 吴文健,应光耀,魏晨,郑水英
WU Wenjian,YING Guangyao,WEI Chen,ZHENG Shuiying

DOI: 10.19585/j.zjdl.2017.01.011

参考文献(References)：

• [1]ALFORD J S.Protecting Turbomachinery From Self-Excited Rotor Whirl[J].Asme Journal of Engineering for Power,1965,87(10):333-344.
• [2]VANCE J M,LAUDADIO F J.Experimental Measurement of Alford’s Force in Axial Flow Turbomachinery[J].Journal of engineering for gas turbines and power,1984,106(3):585-590.
• [3]RHODE D L,GUIDRY M J.Importance of Labyrinth Seal Through-Flow Deflection for Enlarging Clearance With out Increasing Leakage[J].Tribology Transactions,1993,36(3):477-483.
• [4]RHODE D L,HIBBS R I.Tooth Thickness Effect on the Performance of Gas Labyrinth Seals[J].Journal of Tribology,1992,114(4):790-795.
• [5]RHODE D L,NAIL G H.Computation of Cavity-by-Cav ity Flow Development in Generic Labyrinth Seals[J].Journal of Tribology,1992,114(1):47-51.
• [6]RHODE D L,SOBOLIK S R.Simulation of Subsonic Flow Through a Generic Labyrinth Seal[J].Journal of Engineering for Gas Turbines&Power,1986,108(4):429-437.
• [7]MOORE J J.Three-dimensional CFD rotordynamic anal ysis of gas labyrinth seals[J].Journal of vibration and acoustics-transactions of the asme,2003,125(4):427-433.
• [8]李雪松,黄典贵,李久华,等.迷宫气封三维非定常流场及转子动特性数值仿真[J].机械工程学报,2003(04):136-140.
• [9]刘晓锋,陆颂元.迷宫密封转子动特性三维CFD数值的研究[J].热能动力工程,2006,21(6):635-639.