迷宫腔中气流旋转速度的逐腔变化规律及其阻力计算
潘永密,姚宝旺,李烈荣,沈庆根
摘要(Abstract):
简述了迷宫腔中气流的周向分速度在迷宫气流激振力的形成中的作用,提出了迷宫气流平均周向速度c~*逐腔变化的计算方法,并且分析了气流在腔中流动时所受到的阻力计算对c~*值和迷宫密封的动力特性系数计算结果的影响。最后依据试验测得的c~*逐腔变化的数据,修正了气流流过迷宫的阻力系数λ_i的计算式。
关键词(KeyWords):
迷宫密封;气流旋转速度;动力特性系数;阻力系数
基金项目(Foundation): 国家自然科学基金
作者(Author):
潘永密,姚宝旺,李烈荣,沈庆根
参考文献(References):
- 1 Greathead S H, Bastow P. Investigations into Load Dependent Virbrations of the High Pressure Rotor on Large Turbo-Generators. I. Mech. Eng. Conference on Vibration in Rotating Machinery, 1976: 279-285
- 2 郭干青.合成气-循环气压缩机低压缸事故及其改造更新.大化肥,1985;(6) :405-413
- 3 Alford J S.Protecting Turbomachinery From Self-Excited Potor Whirl.Journal of Engineering for Power,1965; (10) : 333-344
- 4 Iwatsubo T et al. Flow Induced Forcc of Labyrinth Seal. NASA, CP2250, Proceeding of a Workshop, Texas A&M University, 1982: 205-222
- 5 Benckert H, Wachter J. Flow Induced Spring Coefficients of Labyrinth Seal Application in Rotor Dynamics, Rotordynamic Instability Problems in High-Performance Turbomachinery, 1980;(8) : 189-212
- 6 Brown R D, Leong Y M M S. Experimental Measurement of Lateral Force in a Labyrinth and the Effect on Rotor Stability, I. Mech. E. Conference on Vibration in Rotating Machinery, 1984; (9) 215-222
- 7 #12
- 8 谢春良,潘永密.迷宫密封动力特性系数的研究.流体工程,1988;(10) :1-9
- 9 [英]霍兰得F A.化工流体流动.西安交通大学出版社,1985
- 10 Jenny R. Labyrinths as a Cause of Self-Excited Rotor Oscillation in Centrifugal Compressors. Sulzer Technical Review, 1980; 62(4) : 149-156