基于POD降阶模型的非接触端面密封动态监测原理及仿真

Abstract

Abstract: To solve the complex multi-dimensional problem arising in the process of obtaining the real-time performance of a non-contact face seal, a reduced order model based on proper orthogonal decomposition (POD) is proposed. With the model, the dynamic seal performance parameters are computed, including the liquid film force generated by the sealing micro-gap and different directional moments induced by the liquid film. With the POD reduced order model, the principle for the real-time monitoring of the non-contact face seal performance is presented, and the calculation error for different vibration frequencies of axial positions are analyzed. With the principle, a numerical simulation of a water-lubricated non-contacting face seal with different seal gaps and liquid vibration frequencies is implemented, and the liquid film force, torque and their calculation errors are obtained. The results show the high accuracy of the non-contact seal dynamic monitor based on the proposed POD reduced-order model, which will help to promote the level in researching the dynamic control of non-contacting face seals and the static and dynamic performances of seals during the transient start-up stage.

Key words: non-contacting face seal, real-time monitoring, proper orthogonal decomposition method, liquid film force, vibration

CLC Number:

TH117

ZHANG Guoyuan, ZHAO Weigang, YAN Xiutian, CHEN Guoding, CHEN Yao. Principle and Simulation for Real-time Monitoring of the Non-contact Face Seal Based on POD Model[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2012, 33(2): 354.

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Principle and Simulation for Real-time Monitoring of the Non-contact Face Seal Based on POD Model

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