中文摘要：

为了明确积灰对翅片管换热器的长效性能的影响规律，需要了解不同管排数对翅片管换热器表面积灰量与空气侧压降的影响。本文通过换热器积灰可视化实验，研究了管排数对换热器表面粉尘沉积量与空气侧压降的影响特性。实验中测试样件为开缝翅片管换热器，管排数范围为1 排~3 排。实验结果表明，管排数为3 排的换热器样件表面积灰量比管排数为2 排和1 排的换热器样件分别增加了54.4%和101.1%；换热器表面沉积粉尘后，会增大空气侧压降，对于管排数为1 排、2 排和3 排的换热器样件，积灰导致空气侧压降分别增加了248.7%、189.3%和167.6%。

英文摘要：

The effect of tube row number on particle deposition weight and air-side pressure drop of finned tube heatexchangers should be investigated to know the influence of particle deposition on the long-term performance of finnedtube heat exchangers. In this study, the influence mechanism of tube row number on particle deposition weight andair-side pressure drop was analyzed by visualization experiments. In the experiments, the tested samples are split finnedtube heat exchangers, and the number of tube rows ranged from 1 to 3. The results show that, the maximum dustdeposition weight on finned tube heat exchangers with triple row tube increased by 54.4% and 101.1% respectivelycompared with those on the heat exchangers with double row tube and single row tube. Particle deposited on the heatexchangers can increase the air-side pressure drop, and the air-side pressure drop on heat exchangers with triple rowtube, double row tube and single row tube increased by 247.8%, 189.3% and 167.6%, respectively.