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重点研究的是水和乙醇在放置了强化元件的光滑铜表面上的池核沸腾传热性能。该强化元件对部分加热表面上方的空间进行限制,使液体存在的空间就被分为交替存在的受限空间和自由空间。本研究中所探讨的主要参数是热通量(13～400 kW/m~2)和受限空间尺度(0.2 mm,0.5 mm,无限制结构)。实验结果表明,对水和乙醇而言,这样的强化元件都可获得良好的沸腾传热特性.可视化结果表明,几乎所有有效核化区域都在受限空间内,即使在高过热度下自由空间内也很少出现有效核化点。
The focus is on pool boiling heat transfer performance of water and ethanol on a smooth copper surface where the reinforcing elements are placed. The stiffening element limits the space above the partially heated surface so that the space where the liquid is present is divided into confined spaces and free spaces that alternate. The main parameters discussed in this study are heat flux (13-400 kW / m 2) and confined spatial scales (0.2 mm, 0.5 mm, unrestricted structure). Experimental results show that for both water and ethanol, these elements have good boiling heat transfer characteristics and the visualization results show that almost all of the effective nucleation sites are within the confined space, even in the case of high degree of superheat There are few effective nucleation sites within.