Thermomechanical stress analysis for gas turbine blade with cooling structures
Multidiscipline Modeling in Materials and Structures
ISSN: 1573-6105
Article publication date: 20 April 2018
Issue publication date: 8 October 2018
Abstract
Purpose
Blade tip clearance has always been a concern for the gas turbine design and control. The numerical analysis of tip clearance is based on the turbine components displacement. The purpose of this paper is to investigate the thermal and mechanical effects on a real cooling blade rather than the simplified model.
Design/methodology/approach
The coupled fluid-solid method is used. The thermal analysis involves solid and fluid domains. The distributions of blade temperature, stress and displacement have been calculated numerically under real turbine operating conditions.
Findings
Temperature contour can provide a reference for stress analysis. The results show that temperature gradient is the main source of solid stress and radial displacement. Compared with thermal or mechanical effect, there is a great change of stress magnitude for the thermomechanical effect. Large stress gradients are found between the leading and trailing edge of turbine cooling blade. Also, the blade radial displacement is mainly attributed to the thermal load rather than the centrifugal force. The analysis of the practical three-dimensional model has achieved the more precise results.
Originality/value
It is significant for clearance design and life prediction.
Keywords
Acknowledgements
This work is supported by the National Natural Science Foundation of China (Grant No. 51575444), Aerospace Science and Technology Foundation (Grant No. 2017-HT-XGD) and Aviation Power Foundation (Grant No. 6141B090319).
Citation
Tong, F., Gou, W., Li, L., Gao, W. and Feng Yue, Z. (2018), "Thermomechanical stress analysis for gas turbine blade with cooling structures", Multidiscipline Modeling in Materials and Structures, Vol. 14 No. 4, pp. 722-734. https://doi.org/10.1108/MMMS-08-2017-0081
Publisher
:Emerald Publishing Limited
Copyright © 2018, Emerald Publishing Limited