CAJ | 학술논문

设计了一种多孔微槽道复合结构，首先在高温条件下通过烧结将颗粒状铜粉与基体紧密结合在一起，形成具有一定厚度的多孔层结构；再利用线切割在多孔层上加工出具有一定深度的微槽道结构。微槽道结构不仅增加了沸腾时烧结多孔层的表面积，还提供蒸汽通道来保证蒸汽在较小阻力情况下逸出，从而利于气泡脱离；同时在液体剧烈沸腾时可以提供气液两相通道，从而分离气液相对流动。文中还分析了多孔微槽道复合结构关键参数（微槽道数目、微槽道角度、槽宽和槽深等）对沸腾传热效果的影响。实验结果表明，微槽道数目越多，微槽道深度越大，气液界面接触面积越大，强化沸腾传热效果越明显。
설계료일충다공미조도복합결구，수선재고온조건하통과소결장과립상동분여기체긴밀결합재일기，형성구유일정후도적다공층결구；재이용선절할재다공층상가공출구유일정심도적미조도결구。미조도결구불부증가료비등시소결다공층적표면적，환제공증기통도래보증증기재교소조력정황하일출，종이리우기포탈리；동시재액체극렬비등시가이제공기액량상통도，종이분리기액상대류동。문중환분석료다공미조도복합결구관건삼수（미조도수목、미조도각도、조관화조심등）대비등전열효과적영향。실험결과표명，미조도수목월다，미조도심도월대，기액계면접촉면적월대，강화비등전열효과월명현。
In the investigation, a porous micro-channel composite structure was designed and prepared .First, the copper particles were sintered together with the base at high temperatures to form a porous layer structure of certain thickness.Then, a micro-channel structure of certain depth was made on the porous layer through wire-electrode cutting.The micro-channel structure is not only able to increase the surface area of sintered porous layer when boiling but also provide steam channels to ensure the steam to escape when resistance becomes less , thus helping bubbles go out easily .Meanwhile , when liquid is boiling violently , micro-channels can provide gas-liquid two-phase channels , thus separating gas with liquid .Finally, the influence of such key parameters as micro-channel number , micro-channel angle and micro-channel width and depth on the boiling heat-transfer performance were analyzed .Experimental results indicate that the more the micro-channel numbers and the larger the micro-channel depth are , the more contact area of gas-liquid interface will bring about better enhanced boiling heat-transfer effect .