目前对短纽带引发的气液旋流中液膜的分布规律认识不清楚,限制了短纽带在换热器中的应用.本文采用欧拉双流体模型研究了短螺旋纽带引发的管内气液旋流场中液膜的形成及发展规律.研究发现:气液两相雾状流来流,在纽带下游的直管段中,存在两个对称的螺旋涡,截面上的液膜厚度存在两个对称的波峰.纽带下游一定位置处,截面上液膜厚度的周向峰值会达到最大,随后液膜厚度的峰值逐渐降低.周向平均液膜厚度沿轴向先增厚后减薄.截面上流体的低压中心与螺旋涡的中心不重合,受液膜分布的影响显著.
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