A review of blade tip clearance–measuring technologies for gas turbine engines

Blade tip clearance is one of the important parameters affecting the performance, safety and stability of a gas turbine engine. However, it is difficult to measure the tip clearance in real time and accurately during the development and test process of an engine. In order to promote the development...

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Bibliographic Details
Published inMeasurement and Control Vol. 53; no. 3-4; pp. 339 - 357
Main Authors Yu, Bing, Ke, Hongwei, Shen, Enyu, Zhang, Tianhong
Format Book Review Journal Article
LanguageEnglish
Published London, England SAGE Publications 01.03.2020
Sage Publications Ltd
SAGE Publishing
Subjects
Blade tips
Gas turbine engines
Measurement methods
Tip clearance
operating principles
inductive method
microwave method
capacitive method
optical fiber method
Blade tip clearance
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Summary:Blade tip clearance is one of the important parameters affecting the performance, safety and stability of a gas turbine engine. However, it is difficult to measure the tip clearance in real time and accurately during the development and test process of an engine. In order to promote the development of tip clearance–measuring technology and the optimal design of the gas turbine engine, some typical measuring methods of tip clearance and a novel measuring method based on AC discharge are introduced. In this article, the significance for measuring tip clearance of an engine is illustrated first. Then, operating principles, characteristics and developments of those typical measurement approaches are introduced. After that, these methods are analyzed, and the particular characteristic of each measuring approach is summarized.
ISSN:0020-2940
2051-8730
DOI:10.1177/0020294019877514