圆形液体射流冲击单相局部对流传热的实验研究

Experimental Study of Single Phase Local Convective Heat Transfer Impinged by Circular Liquid Jets

以强润湿性液体为工质 ,就圆形自由和浸没射流冲击 r/d=0 ,2 ,3 .5和 5处的换热系数及局部换热系数的径向分布进行了系统测定并予以关联。详细研究了射流出口 Re数和液体温度等对局部换热系数的影响 ,最后就 Nu0 ～ Re关系式中 Re数指数的物理含义作了说明。图 4表 3参 1

Experimental study was carried out to determine the local heat transfer coefficients of r/d =0,2,3,5 and 5 and radial distribution systematically, and all the experimental data were correlated. The effects of jet exit Reynolds number and fluid temperature on local heat transfer coefficients were discussed in detail. At last, the exponent meanings of Reynolds number of Nu 0 ～ Re correlation was explained. Figs 4, tables 3 and refs 14.