垂直受热通道内汽液两相流压降的测定与估算

MEASUREMENT AND ESTIMATION OF PRESSURE DROP OF VAPOR-LIQUID TWO-PHASE FLOW IN HEATED VERTICAL CHANNEL

本文应用带扩大室及毛细管的U管压差计对垂直受热通道内汽液两相流压降进行了测定,作出了实测压降及实测液体循环质量流速与热通量的关系曲线。同时,针对不同结构尺寸的受热通道,利用实测的有效加热功率及液体循环流量数值对汽液两相流压降进行了计算,计算值与实测值吻合较好。

Pressure drops of vapor-liquid two-phase flow in a heated vertical channel are measured by using a U-tube manometer with an enlarged chamber and a capillary,and curves for the relation of the measured pressure drops and the mass velocities of liquid circulation with heat fluxes are drawn. The pressure drops of vapor-liquid two-phase flow are ealculated by using valid heating power and flow rate of liquid circulation in the heated channels with various size. The calculated values are in good agreement with the measured values.