Effect of Non-symmetric Temperature Fields on the Rubbing response of a High Pressure Rotor System

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Journal of Vibration and Shock ›› 2013, Vol. 32 ›› Issue (6) : 115-120.

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Effect of Non-symmetric Temperature Fields on the Rubbing response of a High Pressure Rotor System

ZHU Xiang-zhe1 , YUAN Hui-qun2 , ZHANG Ju-wei1 , SUN Chun-yi1

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Abstract

When the rubbing fault is occurred in the rotor system during practical operation, it is often endured the effect of asymmetric and non-steady temperature fields, which must changed the rubbing response characteristics of the rotor. In this paper, the flow and heat model of high pressure rotor (HPR) was established in condition of nature convection at different parking times. The flow and temperature fields of the HPR were studied by using CFD. Moreover, the continuous finite element model with multiple nodes of the rotor system was established with considering the asymmetric temperature effect. Comparison of different models between ignoring and considering temperature fields were employed in detail. The calculated results show that when the parking temperature field is considered for the HPR, the vibration amplitudes are increased and the orbits become disordered. In the frequency spectrum, there are abundance frequency components inspirited by temperature and rubbing force and the vibration characteristics considering temperature effect are more complicated than ignoring it for the HPR.

Key words

High pressure rotor system / Convective heat transfer / Asymmetric temperature field / Rubbing response / FEM

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ZHU Xiang-zhe;YUAN Hui-qun;ZHANG Ju-wei;SUN Chun-yi. Effect of Non-symmetric Temperature Fields on the Rubbing response of a High Pressure Rotor System [J]. Journal of Vibration and Shock, 2013, 32(6): 115-120