Conjugate Heat Transfer Simulation of the Effect of Tip Clearance on the Thermal Stress of Turbine Rotating Blade Using Genetic Algorithm

DOI

10.2991/lemcs-14.2014.71How to use a DOI?

Keywords

Tip clearance; Turbine rotating blade; Conjugate heat transfer; Vortex motion; Heat transfer coefficient; Thermal stress

Abstract

Tip leakage flow has an obvious effect on the structural durability of turbine blade. Conjugate heat transfer method has been utilized to analyze the effect of tip leakage flow on thermal stress of turbine rotating blade associated with four different clearances. Results of numerical simulation have shown that size and velocity of the leakage vortex, which has an obvious unequal movement, grows bigger along with the increased clearance height. With the 1% tip clearance, a higher heat transfer value exists on the tip surface closer to the pressure side, where the highest value appears on the leading edge. Due to the effect of the vortex motion, heat transfer coefficient grows bigger and higher values move to the suction side. Primary thermal stress appears on the tip surface where the average value grows bigger along with the increase of the clearance height. The obtained results can provide theoretical basis for the design and tip clearance control for turbine blades.

Copyright

© 2014, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Yujie Li
AU  - Yongbao Liu
PY  - 2014/05
DA  - 2014/05
TI  - Conjugate Heat Transfer Simulation of the Effect of Tip Clearance on the Thermal Stress of Turbine Rotating Blade Using Genetic Algorithm
BT  - Proceedings of the International Conference on Logistics, Engineering, Management and Computer Science
PB  - Atlantis Press
SP  - 302
EP  - 305
SN  - 1951-6851
UR  - https://doi.org/10.2991/lemcs-14.2014.71
DO  - 10.2991/lemcs-14.2014.71
ID  - Li2014/05
ER  -