Numerical Simulation of Thermal Contact Resistance between Divergence Cone Interface on Composite Nozzle
Because the mechanism of thermal contact resistance is complex, it is entirely neglected in thermal structure analysis of composite nozzle. The research object is a typical composite nozzle which has two layered divergence cone. The adhesive is carbonized when the temperature exceeds 200℃ and the interface on two layered divergence cone is full of macromolecule gas. Therefore, thermal contact resistance should be considered. Based on Galerkin theory, the thermodynamic finite formulations of axisymmetrical thermal contact resistance element are built. Numerical value of thermal contact resistance is estimated through experimental data by home code for transient heat transfer. Simulation results show that thermal contact resistance has strong influence on heat transfer of two layered divergence cone. Considering from the heat transfer, two layered divergence cone structure have an adiabatic effect on outer case. In thermal structure analysis, the calculated temperature on nozzle wall compares favorably with experimental data when the numerical value of thermal contact resistance is approximate 0. 025 m2 ? ℃/W. The reverse method of thermal contact resistance provides reference for precise heat transfer on composite nozzle.
nozzles thermal contact resistance heat transfer convective heat transfer thermodynamic finite formulation
Zheng Xiaoya Zhang Duo
School of Astronautics, Northwestern Polytechnic University, Xian, 710072,China School of Astronautics, Northwestern Polytechnic University, Xian, 710072, China
国际会议
2010 Asia-Pacific International Symposium on Aerospace Technology(2010 亚太航空航天技术研讨会 APISAT 2010)
西安
英文
1200-1203
2010-09-01（万方平台首次上网日期，不代表论文的发表时间）