对水平管内油制冷剂（R-12）混合物的强制对流蒸发和冷凝进行了压降实验测量，并将数据与各种摩擦压降和空隙率关系进行了比较。然后修改无油数据的最佳表示，以便更好地关联无油和油制冷剂结果。对于冷凝，对洛克哈特-马丁内利摩擦压降关系式和均质含气率模型给出的预测进行了修正。对于蒸发，修改了Dukler II摩擦压降关联式和均匀空隙率给出的预测。这些关系预测85%数据的压降在±35%以内。添加的油使冷凝压降增加2%至6%，蒸发压降增加63%至86%。单位:双引文:ASHRAE交易，1986年，第卷。 第92页。2A，波特兰，或

Experimental measurements of pressure drop have been made for forced-convection evaporation and condensation of oil-refrigerant (R-12) mixtures inside a horizontal tube, Data were compared to a wide range of frictional pressure drop and void fraction relationships. The best representations for the oil-free data were then modified to better correlate both oil-free and oilrefrigerant results. For condensation, a modification of the prediction given by the Lockhart- Martinelli relation for frictional pressure drop and the homogeneous void fraction model is presented. For evaporation, the prediction given by the Dukler II frictional pressure-drop correlation and the homogeneous void fraction is modified. These relationships predict the pressure drop for 85% of the data to within ±35%. The added oil increased the pressure drop 2% to 6% for condensation and 63% to 86% for evaporation.Units: Dual