An experimental investigation of subcooled flow boiling heat transfer in an orthogonal macro channel (d_h = 16 mm) is undertaken. An extraordinary heat transfer performance is observed when a single copper wire mesh screen covers the heating surface of the channel. Experiments are performed with deionized water, at a mass flux range of 100–410 kg/m²s and a heat flux range of 50–850 kW/m². A series of highly subcooled flow boiling experiments demonstrates the existence of regions of heat transfer enhancement, compared to a smooth reference surface. The addition of the mesh layer triggers a self-sustained flow instability accompanied by intense pressure oscillations which allows for remarkably thermally steady state conditions to take place. While in several heat transfer studies, the appearance of pressure oscillations has been attributed with heat transfer deterioration, in the current study we observe that a self-sustained oscillatory flow leads altogether to heat transfer enhancement, baring close resemblance to the well-known microbubble emission boiling flow phenomenology and heat transfer. Aspects of temperature, pressure and flow regimes are presented and discussed accordingly.

对正交宏观通道 (d _h  = 16 mm) 中的过冷流沸腾传热进行了实验研究。当单个铜丝网覆盖通道的加热表面时，观察到非凡的传热性能。使用去离子水进行实验，质量通量范围为 100–410 kg/m ² s，热通量范围为 50–850 kW/m ². 与光滑的参考表面相比，一系列高度过冷的流动沸腾实验证明了传热增强区域的存在。网格层的添加引发了自持流动不稳定性，伴随着强烈的压力振荡，这允许发生显着的热稳态条件。虽然在几项传热研究中，压力振荡的出现归因于传热恶化，但在目前的研究中，我们观察到自持振荡流完全导致传热增强，与众所周知的微气泡排放非常相似沸腾流动现象学和传热。相应地介绍和讨论了温度、压力和流动状态的各个方面。