Blade tip clearance is one of the most important factors affecting the performance and safety of gas turbine. In recent decades, a variety of non-contact measurement methods of blade tip clearance have been developed and applied to aero engine and gas turbine test. However the research regarding the location and quantity of measurement sensors to ensure the most effective measurement, and how to fully analyze and utilize the test data is still rare. In this paper, a mathematical model of tip clearance has been developed. The model has been applied to study the required quantity and location of the sensors. Based on this model, an analysis method of the measured data is established, and the test data of a Dongfang Steam Turbine Co., Ltd. gas turbine is analyzed. The main factors that cause the non-uniform clearance are determined, and an optimization scheme is formed by this method. The results show that this model and method has great value for measurement scheme design, test da...

中文翻译：

---

基于经验模型的燃气轮机叶尖间隙测量分析方法的研究

叶片尖端间隙是影响燃气轮机性能和安全性的最重要因素之一。在最近的几十年中，已经开发了多种叶片尖端间隙的非接触式测量方法，并将其应用于航空发动机和燃气轮机测试。然而，关于测量传感器的位置和数量以确保最有效的测量以及如何充分分析和利用测试数据的研究仍然很少。在本文中，已经开发了尖端间隙的数学模型。该模型已用于研究所需的传感器数量和位置。基于该模型，建立了实测数据的分析方法，并对东方汽轮机有限公司燃气轮机的测试数据进行了分析。确定导致间隙不均匀的主要因素，通过该方法形成优化方案。结果表明，该模型和方法对测量方案设计，测试数据具有重要价值。