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褶皱结构除了承受机械载荷外,由于其特有的空腔结构,特别适合作为高温热结构中主动冷却剂的流道。通过ANSYS/FLOTRAN软件,用有限元法,首先用ANSYS/FLOTRAN有限元软件建立皱褶结构和冷却液的二维有限元模型,通过流热耦合分析得到流场和温度场分布以及与之相关的壁面对流换热系数,进而分析不同冷却剂流动参数和结构参数下的对流换热系数,总结出对应的变化规律。通过研究得出,将皱褶结构应用于主动冷却热防护系统,可以显著提高系统的冷却效率,总结出的规律对高速飞行器皱褶形式的主动冷却热防护系统的设计具有一定参考价值。
In addition to the mechanical load, the pleated structure is particularly suitable as a flow channel for active coolant in high-temperature thermal structures due to its unique cavity structure. By ANSYS / FLOTRAN software, finite element method is used to establish the two-dimensional finite element model of the corrugated structure and the coolant fluid with ANSYS / FLOTRAN finite element software. The flow and temperature field distributions and the related Wall convection heat transfer coefficient, and then analysis of different coolant flow parameters and structural parameters of the convection heat transfer coefficient, summed up the corresponding changes in law. The results show that the application of corrugated structure to the active cooling thermal protection system can significantly improve the cooling efficiency of the system, and the conclusion of the law has certain reference value for the design of active cooling thermal protection system in the form of wrinkles of high-speed aircraft.