Investigation of blade tip clearance effects in EGT of aeroengine

Xiaogang Ma; Jie Bai; Shuming Li

doi:10.1117/12.521528

2 September 2003 Investigation of blade tip clearance effects in EGT of aeroengine

Xiaogang Ma, Jie Bai, Shuming Li

Proceedings Volume 5253, Fifth International Symposium on Instrumentation and Control Technology; (2003) https://doi.org/10.1117/12.521528
Event: Fifth International Symposium on Instrumentation and Control Technology, 2003, Beijing, China

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.

Citation Download Citation

Xiaogang Ma, Jie Bai, and Shuming Li "Investigation of blade tip clearance effects in EGT of aeroengine", Proc. SPIE 5253, Fifth International Symposium on Instrumentation and Control Technology, (2 September 2003); https://doi.org/10.1117/12.521528

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