无风扇蒸发室中微孔烧结吸液芯的研究
Investigation of Micro Porosity Sintered wick in Vapor Chamber for Fan Less Design
摘要：
微孔烧结吸液芯采用金属注射成型工艺制成，可提供微米级的吸液芯密度。它能将53%以上的工作流体保持在吸液芯结构内部，并通过良好的渗透效果对工作流体输送表现出良好的泵送能力。毛细抽运能力是热管设计的重要因素，一般应用于毛细结构的热管都是采用沟槽式或筛网式结构。重力对这两种类型的毛细作用的影响大于烧结芯结构，并且通过蒸发的工作流体的质量热传递决定了蒸汽室的热性能。首先，多孔芯的高密度支持工作流体的高传输能力。毛细孔在微尺度上烧结，限制了工质在蒸汽段汽化时气泡的尺寸。最大传热量随芯体热阻的减小而显著增加。本研究所设计的吸液芯结构的磁导率为0.5 - 0.7，尤其是磁导率（R）= 0.5时性能最佳，其导热系数是直径（Φ）= 10 mm的热管的20倍。测试结果表明，该蒸发室的热性能提高了33%以上。
英文摘要：
Micro Porosity Sintered wick is made from metal injection molding processes, which provides a wick density with micro scale. It can keep more than 53 % working fluid inside the wick structure, and presents good pumping ability on working fluid transmission by fine infiltrated effect. Capillary pumping ability is the important factor in heat pipe design, and those general applications on wick structure are manufactured with groove type or screen type. Gravity affects capillary of these two types more than a sintered wick structure does, and mass heat transfer through vaporized working fluid determines the thermal performance of a vapor chamber. First of all, high density of porous wick supports high transmission ability of working fluid. The wick porosity is sintered in micro scale, which limits the bubble size while working fluid vaporizing on vapor section. Maximum heat transfer capacity increases dramatically as thermal resistance of wick decreases. This study on permeability design of wick structure is 0.5 - 0.7, especially permeability (R) = 0.5 can have the best performance, and its heat conductivity is 20 times to a heat pipe with diameter (Phi) = 10mm. Test data of this vapor chamber shows thermal performance increases over 33 %.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
