边界条件对热防护系统隔热性能的影响
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摘要
运用MSC/NASTRAN有限元软件对热防护系统(TPS)小板作为试验件进行了数值仿真,对比分析了不同材质隔热框对试验件底板温度的影响,同时,对TPS底板在自然对流环境和绝热状态进行了比较。结果表明:隔框的的隔热性能越好,对试验件底板温度测试的结果越真实;对TPS底板施加自然对流使得数值仿真结果更加真实。
The finite element software MSC/NASTRAN is used to simulate the(TPS) plate of thermal protection system as the test piece, and the influence of different material insulation frame on the bottom plate temperature of the test piece is compared and analyzed. At the same time, the natural convective environment and adiabatic state of TPS floor are compared. The results show that the better the thermal insulation performance of the partition is, the truer the results of the temperature measurement of the bottom plate of the test piece are, and the truer the natural convection applied to the TPS bottom plate makes the numerical simulation results more real.
The finite element software MSC/NASTRAN is used to simulate the(TPS) plate of thermal protection system as the test piece, and the influence of different material insulation frame on the bottom plate temperature of the test piece is compared and analyzed. At the same time, the natural convective environment and adiabatic state of TPS floor are compared. The results show that the better the thermal insulation performance of the partition is, the truer the results of the temperature measurement of the bottom plate of the test piece are, and the truer the natural convection applied to the TPS bottom plate makes the numerical simulation results more real.
引文
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[7]张钰.结构热实验技术[M].北京:宇航出版社,1993.
[2]苏大亮,郑晓亚,张铎.飞行器头部热防护系统热分析[J].弹箭与制导学报,2006(1):725-727.
[3]Bradford, J.E, Olds, J.R.Thermal Protection System Sizing and Selection for RLVs Using the Sentry Code. AIAA-2006-4605.
[4]David E. Glass. Ceramic Matrix Composite(CMC)Thermal Protection Systems(TPS)and Hot Structures for Hypersonic Vehicles.AIAA-2008-2682.
[5]秦强,成竹,任青梅,等.温度对刚性陶瓷防热瓦隔热性能的影响[J].导弹与航天运载技术,2010(4):58-61.
[6]郭朝邦,李文杰.高超声速飞行器结构材料与热防护系统[J].飞航导弹,2010(4):88-94.
[7]张钰.结构热实验技术[M].北京:宇航出版社,1993.