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涡轮转子参数对用于动态叶片尖端间隙测量的涡流传感器影响的数值研究。

Numerical Investigation on the Influence of Turbine Rotor Parameters on the Eddy Current Sensor for the Dynamic Blade Tip Clearance Measurement.

作者信息

Zhao Lingqiang, Liu Fulin, Lyu Yaguo, Liu Zhenxia, Zhao Ziyu

机构信息

School of Power and Energy, Northwestern Polytechnical University, Youyi West Road 127#, Xi'an 710054, China.

Xi'an Research Institute of High-Tech, Xi'an 710054, China.

出版信息

Sensors (Basel). 2024 Sep 13;24(18):5938. doi: 10.3390/s24185938.

DOI:10.3390/s24185938
PMID:39338682
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11435737/
Abstract

Eddy current sensors are increasingly being used to measure the dynamic blade tip clearance in turbines due to their robust anti-interference capabilities and non-contact measurement advantages. However, the current research primarily focuses on enhancing the performance of eddy current sensors themselves, with few studies investigating the influence of turbine rotor parameters on the measurements taken by these sensors for dynamic blade tip clearance. Hence, this paper addresses this gap by using COMSOL Multiphysics 6.2 software to establish a finite model with circuit interfaces. Additionally, the model's validity was verified through experiments. This model is used to simulate the voltage output of the sensor and the measurement of dynamic blade tip clearance under various rotor parameters. The results indicate that the length and number of blades, as well as the hub radius, significantly affect the sensor voltage output in comparison to rotation speed. Furthermore, we show that traditional static calibration methods are inadequate for measuring dynamic blade tip clearance using eddy current sensors. Instead, it is demonstrated that incorporating rotor parameters into the calibration of eddy current sensors can enhance the accuracy of dynamic blade tip clearance measurements.

摘要

由于具有强大的抗干扰能力和非接触测量优势，涡流传感器越来越多地用于测量涡轮机叶片尖端的动态间隙。然而，目前的研究主要集中在提高涡流传感器本身的性能上，很少有研究探讨涡轮机转子参数对这些传感器测量叶片尖端动态间隙的影响。因此，本文通过使用COMSOL Multiphysics 6.2软件建立具有电路接口的有限模型来填补这一空白。此外，通过实验验证了该模型的有效性。该模型用于模拟传感器的电压输出以及在各种转子参数下叶片尖端动态间隙的测量。结果表明，与转速相比，叶片的长度和数量以及轮毂半径对传感器电压输出有显著影响。此外，我们表明传统的静态校准方法不足以使用涡流传感器测量叶片尖端动态间隙。相反，事实证明，将转子参数纳入涡流传感器的校准可以提高叶片尖端动态间隙测量的准确性。

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