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中文摘要：
通过实验研究和数值模拟的方法对熔盐堆脱气系统中旋叶式气泡分离器的工作原理进行研究;对照实验现象和数值模拟得到的流场分布,对气泡汇集、聚合和最终气芯的形成过程进行分析。结果表明：水在搅浑叶片的导流作用下会形成一种存在较大径向压力梯度的旋转流动,且径向压力梯度提供的向心力大于流体旋转运动产生的离心力,使得水流中的气泡流向分离器中心;分离器中心区域的径向压力梯度很大且气泡相对运动速度很低,满足气泡发生聚合的条件,因而汇集到中心的气泡会聚合并最终形成稳定的气芯,从而实现对流体中气相的连续分离。
英文摘要：
The mechanism of the vane-type bubble separator developed for Thorium Molten Salt Reactor was investigated experimentally and numerically. The experimental phenomena and flow field obtained by the CFD software of Fluent were compared to analyze the process of the bubble coalescence and merging into a steady air core. It is demonstrated that, a rotational water flow with high radial pressure gradient forms after flowing through the swirl vanes of the separator, and that the bubbles in the flow moving to the center of the separator is due to that the centripetal force provided by the radial pressure gradient is greater than the centrifugal force generated by rotation. The bubbles will coalesce and merge to form a steady air core due to the large radial pressure gradient and low relative velocity in the central area of the separator, leading to the continuous separation of bubbles from the water flow.
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