Triply periodic minimal surface (TPMS) can control the structural characteristic parameters through implicit functions, which possesses great significance for the customization of porous matrix topologies used in transpiration cooling. An innovative geometric reconstruction and meshing method is developed to reconstruct different TPMS porous matrix, a pore-scale numerical simulation of transpiration cooling coupled with mainstream is performed, and a hot wind tunnel experiment is developed to validate the numerical method. The main conclusions are as follows: The flow resistance loss of coolant within porous matrix is greatly influenced by the shape and size of pore throat, and due to the interaction between mainstream and coolant, higher flow resistance loss doesn't mean a higher coolant injection pressure. The influence of pore morphology on cooling efficiency is more obvious at higher coolant dosage, and considering the coolant injection pressure and cooling efficiency at the same time, the W(B) structure shows the best comprehensive performance. The generation of counter-rotating vortex pairs (CRVPs) in coolant film might lead to the increase in skin-friction coefficient on the structure surface, and the complex outflow angle of coolant can inhibit the generation of CRVPs, so for the case needs to reduce the skin-friction resistance, W(A) structure is recommended.

中文翻译：

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基于三周期最小表面的蒸腾冷却的孔隙尺度研究

三周期最小表面（TPMS）可以通过隐函数控制结构特征参数，这对于蒸腾冷却中多孔基体拓扑的定制具有重要意义。开发了一种创新的几何重建和网格划分方法来重建不同的TPMS多孔基质，进行了蒸腾冷却与主流耦合的孔隙尺度数值模拟，并开发了热风洞实验来验证数值方法。主要结论如下：冷却剂在多孔基体内的流动阻力损失受孔喉形状和尺寸的影响较大，并且由于主流与冷却剂之间的相互作用，较高的流动阻力损失并不意味着较高的冷却剂注入量。压力。冷却剂用量越高，孔隙形貌对冷却效率的影响越明显，同时考虑冷却剂喷射压力和冷却效率，W(B)结构表现出最好的综合性能。冷却液膜中反向旋转涡对（CRVPs）的产生可能会导致结构表面摩阻系数的增加，而复杂的冷却液流出角可以抑制CRVPs的产生，因此对于这种情况需要减少皮肤摩擦阻力，推荐W(A)结构。