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V型皱褶芯材夹层结构与强迫对流冷却相结合,可应用于高超声速飞行器或大功率电子器件承载和散热的多功能设计。文章采用数值仿真方法对强迫对流条件下V型皱褶芯材夹层结构的换热及其产生的热应力进行研究,获得了相应的速度场、温度场及结构热应力分布。结果表明:强迫对流条件下,V型皱褶芯材夹层结构的换热性能明显提高,同时导致较大的压力损失。流体速度场随着几何构型的改变而发生周期性的变化,在结构偏折处波峰一侧流速达到最大,对流换热得到增强;沿着冷却液流动方向,结构与冷却液的温度逐渐升高,并伴随着周期性的波动;皱褶芯材夹层结构的整体换热能力随着入口流速的增大而增强。热流输入侧的面板热应力和变形均较大,结构皱褶部位存在应力集中。
V-pleated core sandwich structure combined with forced convection cooling can be applied to multi-functional design of bearing and cooling of hypersonic vehicles or high-power electronic devices. In this paper, numerical simulation is used to study the heat transfer and thermal stress of V-type corrugated core sandwich structure under forced convection. The corresponding velocity field, temperature field and thermal stress distribution are obtained. The results show that under the forced convection condition, the heat transfer performance of the sandwich structure of V-shaped corrugated core obviously increases, and at the same time it leads to large pressure loss. The fluid velocity field changes cyclically with the change of geometry configuration. The flow velocity reaches the maximum on the crest side of the structural deflection and the convective heat transfer is enhanced. Along with the flow direction of the coolant, the temperature of the structure and the coolant gradually increases High, accompanied by cyclical fluctuations; the overall heat transfer capacity of the corrugated core sandwich structure increases with the increase of inlet velocity. The thermal stress and deformation of the panels on the input side of the heat flow are relatively large, and the stress concentration occurs in the folds of the structure.