试验在干燥真空环境下进行，在八个具有不同几何形状的机械膨胀翅片管换热器（3/8英寸管）上进行，包括翅片厚度变化、每英寸翅片数和净干扰。八台热交换器中的一台也在潮湿条件下进行了测试。根据实验数据，采用数学模型计算接触热导率。进行了热导率误差估计分析。 使用扫描电子显微镜检查扁平铝翅片与铜管之间的接触区域。获得了干接触电导与翅片数（与管接触的实际翅片环长度）、翅片厚度、净干涉和未扩张管直径的相关性。单位:I-PCitation:ASHRAE交易，1985年，第91卷，pt。你好，檀香山2A

Tests were conducted in a dry vacuum environment, on eight mechanically expanded finned tube heat exchangers (3/8 inch tubes) with different geometries including variation in fin thickness, fins per inch, and net interference. One of the eight heat exchangers was also tested under wet conditions. A mathematical model was used to calculate the thermal contact conductance from the experimental data. An error analysis was performed to estimate the range of error in determining the thermal contact conductance. A scanning electron microscope was used to examine the contact region between the flat aluminum fin and the copper tube. A correlation of the dry contact conductance in terms of fin number (actual fin collar length in contact with the tubes), fin thickness, net interference, and unexpanded tube diameter was obtained.Units: I-P