Surface wettability has a significant effect on the flow boiling heat transfer coefficient in metal foam filled tubes. In the present study, the flow boiling characteristics of metal foam filled tubes with different wettability were experimentally investigated, covering the surface wettability of uncoated, hydrophobic and hydrophilic surfaces. The results showed that, for the hydrophilic metal foam filled tubes, the heat transfer coefficient and pressure drop are decreased by 2%–18% and 4%–15%, respectively than those for the uncoated ones; for the hydrophobic metal foam filled tubes, both the heat transfer coefficient and pressure drop are larger than those for uncoated ones, and the increments in the heat transfer and pressure drop are 6%–30% and 8%–35%, respectively. Based on the experimental data, the correlations for heat transfer and pressure drop of flow boiling in metal foam filled tubes with different wettability were developed with the deviations of ±6.4% and ±9.7%, respectively.

表面润湿性对金属泡沫填充管中的流动沸腾传热系数有显着影响。在本研究中，实验研究了具有不同润湿性的金属泡沫填充管的流动沸腾特性，涵盖了未涂层、疏水和亲水表面的表面润湿性。结果表明，亲水金属泡沫填充管的传热系数和压降比未涂层管分别降低2%~18%和4%~15%；对于疏水性泡沫金属填充管，传热系数和压降均大于未涂层管，传热和压降增量分别为 6%~30% 和 8%~35%。根据实验数据，