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Proceedings Paper

Investigation of blade tip clearance effects in EGT of aeroengine
Author(s): Xiaogang Ma; Jie Bai; Shuming Li
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Paper Abstract

Exhaust Gas Temperature (EGT) of aero engine is one of pivotal technical indexes, as well as a parameter represents the quality of shop servicing. Factors act on it are complex and incalcuable, but the work presented here concerns the blade tip clearance effects on it. The present study explores that efficiency of modern gas turbines is badly effected by the gaps between rotors an stators; Some literatures reported: efficiency decreases 1.5% when clearance increases 1% length of blade and every 1% efficiency declined it means fuel cost increases 2%. However, the variety of tip clearance is very intricate and difficult to define the change of dynamic tips clearance by theoretic calculation but mainly depend on observation. Data of tip clearance discussed in this paper are static clearance before test and emphasize particularly on investigating the relationship of data of assembling blades and EGT. Besides, BP neural network is adopted in this paper to forecast the effect of tip clearance on EGT.

Paper Details

Date Published: 2 September 2003
PDF: 4 pages
Proc. SPIE 5253, Fifth International Symposium on Instrumentation and Control Technology, (2 September 2003); doi: 10.1117/12.521528
Show Author Affiliations
Xiaogang Ma, Civil Aviation Univ. of China (China)
Jie Bai, Civil Aviation Univ. of China (China)
Shuming Li, Civil Aviation Univ. of China (China)

Published in SPIE Proceedings Vol. 5253:
Fifth International Symposium on Instrumentation and Control Technology
Guangjun Zhang; Huijie Zhao; Zhongyu Wang, Editor(s)

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