本文针对交错式迷宫密封的结构特点,提出了一种全新的多控制体模型,从流体力学的基本方程出发,建立起一组描述气体流动的偏微分方程,并将其在静态解基础上线性化,从而导出了这种密封的动力特性计算公式,该方法具有简单、方便、实用的特点。计算结果与国外文献所给出的实验结果基本吻合。
Interlocking labyrinth seals are in common use inhigh-performance Turbomachinery. Their dynamiccharacteristics are of great influence on the stability of rotor-systemsof turbomachinery. A multi-control volumemodel is presented in the paper for calculating the dynamiccharacteristic of interlocking labyrinth seals. Based onthe basic theory of fluid mechanics, the partial differenceequation set describing the turbulent flow in the labyrinthchambers is developed and linearized. Then the pressuredistribution in the chambers and the rotordynamiccoefficients can be obtained. The calculated results arecompared with the experimental results presented abord andare in good agreement. This calculation provides an importanttheoretical basis for the stability evaluation of rotorsystem of turbomachinery with interlocking labyrinth seal.
参考文献
| [1] | R Nordmann;P Weiser.Rotordynamic Coefficients forLabyrinth Seals Calculated by Means of a FiniteDifference Technique[A].Texas,1988 |
| [2] | G Thieleke;H Stetter.Experimental Investigations ofExciting Forces Caused by Flow in LabyrinthSeals[C].NASA Conference, Texas,1990 |
| [3] | 沈庆根;李烈荣;郑水英 .迷宫密封的两控制体模型与动力特性研究[J].振动工程学报,1996,9(01):24-30. |
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