接触热阻对疏导式热防护结构防热效果的影响

ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2012, Vol. 33 ›› Issue (10): 1834-1841.

• Solid Mechanics and Vehicle Conceptual Design • Previous Articles Next Articles

Effect of Thermal Contact Resistance on the Performance of Heat-pipe-cooled Thermal Protection Structures

LIU Donghuan, SHANG Xinchun

Department of Applied Mechanics, School of Mathematics and Physics, University of Science and Technology Beijing, Beijing 100083, China

Received:2011-11-16 Revised:2011-12-27 Online:2012-10-25 Published:2012-10-25
Supported by:
National Natural Science Foundation of China (10872104, 10772024); The Fundamental Research Funds for the Central Universities (FRF-BR-10-007A, FRF-AS-09-001A).

Abstract

Abstract: Heat-pipe-cooled leading edge structure is a novel and efficient thermal protection method, and the thermal contact resistance(TCR) between the heat pipe and high temperature composite material strongly influences the thermal protection performance of the whole structure. A computational model of the heat-pipe-cooled thermal protection structure is first constructed, and then the computational scheme of the thermomechanical coupling caused by thermal contact resistance is established based on the sequential coupling method. The thermomechanical coupling analysis of the thermal protection structure under different initial gaps are then performed based on the present method, with emphasis on the influence of thermal contact resistance on the thermal protection effect. Numerical results show that using the initial gap can greatly reduce the stress level of the structure, while the interface thermal contact resistance and stagnation temperature increase. In the structural safety evaluation of heat-pipe-cooled thermal protection structures, both the stress criterion and temperature criterion must be satisfied at the same time.

Key words: heat-pipe-cooled thermal protection, thermal contact resistance, high temperature heat pipe, thermomechanical coupling, initial gap

CLC Number:

V414.9

LIU Donghuan, SHANG Xinchun. Effect of Thermal Contact Resistance on the Performance of Heat-pipe-cooled Thermal Protection Structures[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2012, 33(10): 1834-1841.

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Effect of Thermal Contact Resistance on the Performance of Heat-pipe-cooled Thermal Protection Structures

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