论文部分内容阅读
利用双头电导探针测量技术，研究了水平管内空气－水两相流的界面浓度，并得到了气液两相流的界面特性参数（如气泡速度、气泡尺寸和界面浓度）及其随气液两相流量的变化规律．研究发现：随着气相流量的增大，各点的气泡速度、气泡尺寸、界面浓度相应增加；随着液相流量的增大，除气泡速度随之增大外各点的其它参数随之减小．水平管内界面浓度在同一测量角度的径向分布类似，界面浓度在管内除水平管径方向外，沿其它方向的分布都是非对称的．局部界面浓度在管子的上部最高可达６００ｍ－１，此种现象反映了靠近管子上壁的热质交换最为强烈
The interface concentration of air-water two-phase flow in horizontal tube was studied by double-head conductivity probe and the interface parameters (such as bubble velocity, bubble size and interface concentration) Liquid two-phase flow rate changes. The results show that with the increase of the gas flow rate, the bubble velocity, the bubble size and the interface concentration at each point increase correspondingly. With the increase of the liquid flow rate, the bubble velocity increases with the increase of the bubble velocity, small. The radial distribution of the interface concentration in the horizontal tube is similar at the same measurement angle. The concentration of the interface is not symmetrical in all directions except for the horizontal tube diameter. The local interface concentration of up to 600m-1 in the upper part of the tube reflects the most intense heat and mass exchange close to the upper wall of the tube