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Prediction of the thermal bow of rotor based on the measured displacement and temperature
International Journal of Distributed Sensor Networks ( IF 2.3 ) Pub Date : 2020-10-01 , DOI: 10.1177/1550147720962993
He Peng 1, 2 , Zhaohua Zhou 1 , Jigang Feng 1 , Xiangyu Yu 1 , Zhansheng Liu 1
Affiliation  

The thermal bow of the rotor occurs in the cooling process after the shutdown of the aeroengine. The deflection of the bowed rotor is the primary concern of the research on this problem. The objective of this work is to propose a method to predict the bow shape of the rotor with the measured temperature and displacement in a rotor thermal bow experiment. The experiment was introduced and the variations of the measured temperature and displacement were analyzed. A series of polynomial function was proposed to model the bowed shape of the rotor. The measured temperature and displacement were taken into considered in the constraint equations, with which the coefficients in the polynomial function were obtained. The bow shapes of the rotor at different time in the experiments were analyzed. Results showed that the maximum deflection of the rotor was much greater than the measured displacement at the sections near the rotor support. The forced cooling could reduce the thermal deflection of the rotor quickly. The analysis of the different cases of experiment indicated that the proposed method could predict the bow shape of the rotor with the measured temperature and displacement.

中文翻译:

基于实测位移和温度的转子热弯曲预测

转子的热弓发生在航空发动机停机后的冷却过程中。弓形转子的偏转是该问题研究的主要关注点。这项工作的目的是提出一种在转子热弯曲实验中通过测量的温度和位移来预测转子弯曲形状的方法。介绍了实验,分析了测量温度和位移的变化。提出了一系列多项式函数来模拟转子的弓形形状。在约束方程中考虑了实测温度和位移,得到多项式函数中的系数。分析了实验中不同时间转子的弓形。结果表明,转子的最大挠度远大于转子支架附近部分的测量位移。强制冷却可以迅速减少转子的热变形。对不同实验情况的分析表明,所提出的方法可以通过测量的温度和位移来预测转子的弓形。
更新日期:2020-10-01
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