Because of low cost , easy molding Aluminum finned tube is widely applied in the indirect air -cooling condenser , the relationship between the heat transfer coefficient and resistance on air speed to aluminum finned tube heat exchanger design and operation is very important.Using computational fluid dynamics ( CFD) method, the heat resistance performance on three structures of aluminum fin heat exchangers are studied by numerical simulation , the calculation results show that , for the same diameter , the heat transfer coefficient of single bridge and the double bridge structure is basically the same , but the double bridge resistance increased; for single or double bridge struc-ture, Large diameter has the large heat transfer coefficient , at the same time resistance increases more; when the fin thinning , the heat transfer coefficient is basically unchanged , but the resistance is obviously reduced.The re-search results has an important reference value on the economic operation of the air cooled condenser and air cooling power plant.%铝翅片管由于成本低、易于成型在间接空冷冷凝器上有广泛应用，其传热系数和阻力与空气速度之间的关系对铝翅片管换热器设计和运行很重要。应用计算流体力学（CFD）方法，对三种结构铝翅片换热器的换热及阻力性能进行了数值模拟，计算结果表明，对于相同的管径，单桥与双桥结构的传热系数基本相同，而双桥的阻力有所增大；对于单桥或双桥结构来说，大管结构的传热系数增大，同时阻力增大较多；当翅片减薄时，传热系数基本不变，而阻力有明显的减小。研究结果对提高空冷凝汽器乃至空冷电厂的运行经济性都具有重要的参考价值。
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