螺旋管中汽-水两相流强制对流沸腾传热研究

An Investigation on Steam-Water Two-Phase Forced Convection Boiling Heat Transfer in Helical-Coiled Tubes

对螺旋管中两相强制对流沸腾传热特性进行了试验研究。试验是在高压水回路上进行的 ,试验参数为系统压力 6 0～ 1 1MPa ,质量流速 40 0～ 1 2 0 0kg/(m2 ·s) ,热流密度 0～ 45 0kW /m2 ,螺旋直径1 3 7m ,螺旋上升角 3 94°。用修正L M关系式整理了两相强制对流放热系数。同时也得到了螺旋管单相水和单相蒸汽的强制对流放热系数 。

Two phase flow forced convection boiling heat transfer on helical coiled tubes has been systematically studied. The experiments have been done on high pressure water loop in Xi'an Jiaotong University. The test condition is as follows: system pressures 6.0 to 11 MPa, mass velocity 400 to 1 200 kg /(m 2·s), helical diameter 1.37 m and helical angles 3.94°. Two phase forced convection heat transfer coefficients are correlated as function of Lockhart Martinelli parameter. Subcooling water and superheated vapor forced convection heat transfer coefficient are also presented and compared with other literatures.