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为优化ＩＯＳＦ管的管外几何参数，根据所建数学物理模型，对不同换热工况和不同结构参数进行数值分析与模拟优化．研究结果表明：当管长Ｌ＝０．７ｍ、螺旋角β＝１８°、管外径Ｄｏ＝０．０１６ｍ，Ｈ＝０．００１ｍ时，φ＝７６°与Ｎ＝３２是最佳匹配参数，此时有最大平均冷凝换热系数；ＩＯＳＦ管管外螺旋角在β＜２７°的范围内，其管外传热特性与纵槽管基本相当；翅片夹角φ和螺旋槽头数Ｎ是对ＩＯＳＦ管管外冷凝换热产生主要影响的结构参数；局部冷凝换热系数沿管长跌落主要集中在开始的０．５ｍ内，因此排液盘的间距应不大于０．５ｍ，才能更有助于平均冷凝换热系数的提高
In order to optimize the geometrical parameters of IOSF tube, numerical analysis and simulation optimization of different heat transfer conditions and different structural parameters were carried out according to the mathematic and physical model. The results show that φ = 76 ° and N = 32 are the best matching parameters when the pipe length is L = 0.7m, the helix angle is β = 18 °, the pipe outer diameter is Do = 0.016m and H = 0.001m. The maximum average condensation heat transfer coefficient at this time; IOSF pipe outside the helix angle in the range of β <27 °, the outer tube heat transfer characteristics and longitudinal groove tube basically the same; fin angle φ and spiral groove head number N The structural parameters that have a major impact on the condensation heat transfer outside the IOSF tube; the local condensation heat transfer coefficient falls mainly along the tube length within the first 0.5m, so the distance between the drainage pan should not exceed 0.5m, to be more Help to improve the average condensation heat transfer coefficient