空气强迫横掠螺纹管对流传热特性的试验研究

Experimental Research about the Charactcrs of Forced Convection Heat Transfer Across the Scrcwed Pipe

对内、外径相同的光面铜管和铜螺纹管分别进行了传热试验研究，得到了两者的对流传热无因次关联式（在１．５×１０￣４＜Ｒｅ＿ｆ＜３．ｌ×ｌ０￣４范围内）．并确定了临界雷诺准则值，

Through separately doing heat tramfer experiments of polished copper pipo and screwedpipe, whose inside and outside diameters are same, obtains the convection heat transfer dimensioulessrelational expression to each other(with the area of l.5×104<Ref<3.1×104).At the same time,detemes the critical reynolds.