Entrained droplets and flow pattern change adversely affects separation performance of swirl-vane separators. Investigating gas–liquid distribution at swirler outlet, an experiment was conducted using a wire-mesh sensor positioned. Air and liquid superficial velocities ranged from 8.3 to 25.6 m/s and 0.1 to 1.4 m/s, respectively, covering swirling annular and swirling churn flow at swirler outlet. In swirling annular flow, liquid phase primarily exists as a stable thin film which facilitates efficient separation. In swirling churn flow, wall liquid film has unstable large amplitude disturbance waves. Disrupting liquid film leads to entrained droplets forming in gas center, increasing separation distance and hindering gas–liquid separation. The transition boundary from swirling churn to swirling annular is crucial. Increasing swirler angle shifts the transition boundary towards higher gas velocity at the same liquid velocity. A theoretical model based on interfacial shear stress and gas core blockage predicts the flow pattern transition at swirler outlet.

中文翻译：

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使用丝网传感器进行旋流器出口旋流流型的实验研究


夹带的液滴和流型变化会对旋流叶片分离器的分离性能产生不利影响。为了研究旋流器出口处的气液分布，使用定位的丝网传感器进行了实验。空气和液体的表观速度范围分别为 8.3 至 25.6 m/s 和 0.1 至 1.4 m/s，覆盖旋流器出口处的旋流环形流和旋流搅动流。在旋涡环流中，液相主要以稳定的薄膜形式存在，有利于有效分离。在旋涡流中，壁面液膜存在不稳定的大幅度扰动波。破坏液膜导致气体中心形成夹带液滴，增加分离距离并阻碍气液分离。从旋流搅动到旋流环形的过渡边界至关重要。增加旋流器角度使过渡边界在相同的液体速度下向更高的气体速度移动。基于界面剪切应力和气芯堵塞的理论模型预测了旋流器出口处的流型转变。