在汽泡流流型区域内,其汽泡间的相互碰撞和汽泡对周围液体的扰动非常明显。这种作用使得汽液两相流中汽含率的分布具有一定的特征。它在流动沸腾中显得特别重要。前人曾提出汽含率在汽泡流中的分布呈指数函数形式,在圆管中心处有一最大点。但实验证明在向上并流时靠近边界处的汽含率较高,目前已提出一些机理和模型来描述这种现象,但处理的结果尚未十分满意,需作进一步改进。 In the area of ​​bubble flow pattern, the collisions between the bubbles and the disturbance of bubbles around the liquid are very obvious. This effect makes the vapor-liquid two-phase flow distribution of steam content has certain characteristics. It is particularly important in the flow of boiling. Proponents have proposed vapor content in the bubble flow distribution in the form of an exponential function, there is a maximum point in the center of the tube. However, experiments have shown that there is a high vapor content near the boundary during the upward co-current. Some mechanisms and models have been proposed to describe this phenomenon, but the results of the treatment are not yet satisfactory and need to be further improved.