回路热管中3D毛细芯抽吸能力的研究

Study on 3D printing capillary wick suction capacity in the loop heat pipe

从介观的角度,采用格子Boltzmann方法中的Shan-Chen伪势模型,对重力场下竖直单通道和通道阵列内液体毛细上升的过程进行了模拟,讨论了通道个数对最大毛细上升高度的影响。基于毛细芯在回路热管中的核心地位以及3D打印技术的巨大潜力,制造了一个3D打印钛合金毛细芯并以其为物理模型,对该毛细芯进行了简化建模和毛细抽吸性能的数值模拟,并搭建试验台开展了实验研究。对比分析模拟和实验结果,获得了良好的一致性。

Shan Chen pseudo - potential model in Lattice Boltzmann method was applied to numerically simulate the process of capillary rise in the single - channel and array - channel under gravity. The influence on the maximum height of capillary rise by changing the number of channels was discussed. Based on the dominant position of capillary wick in the loop heat pipe and the great potential of 3D printing technology, a simplified modeling and numerical simulation based on a 3D printing titanium alloy capillary wick were carried out. An experiment about the capillary rise process in the 3D printing titanium alloy capillary wick was performed. The experimental result was accordant well with the numerical simulation.