Abstract The following paper presents dynamic leakage rate and coupled interaction for variable speed rotor-labyrinth (LABY) seal, with rotating speed from 18 krpm to 30 krpm. Variable speed rotor vibration characteristics are incorporated into transient computational fluid dynamic (CFD) calculations as boundary conditions of seal flow field to show the real-time effect of rotordynamic in seal flow field. Leakage rate across a variable speed rotor-seal increases with rotor vibration, but this effect is prominent at lower speed than at higher speed. Leakage characteristic is determined by differences in rotor vibration amplitude rather than rotating speed. The results also reveal that aerodynamic forces of labyrinth seal flow field can improve rotor stability, and this interaction between rotor and seal decreases with the increase of rotating speed.

中文翻译：

---

变转速转子-迷宫密封系统的研究

摘要 本文介绍了转速为18 krpm 至30 krpm 的变速转子-迷宫式(LABY) 密封的动态泄漏率和耦合相互作用。将变速转子振动特性纳入瞬态计算流体动力学 (CFD) 计算作为密封流场的边界条件，以显示转子动力学在密封流场中的实时影响。变速转子密封件的泄漏率随着转子振动而增加，但这种影响在较低速度下比在较高速度下更为突出。泄漏特性是由转子振动幅度而不是转速的差异决定的。结果还表明，迷宫密封流场的气动力可以提高转子的稳定性，并且转子与密封之间的这种相互作用随着转速的增加而减小。