Swirling Annular Flow in a Steam Separator
Swirling Annular Flow in a Steam Separator
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DOI：
10.1115/1.3078701
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发表时间：
2009-05-01
影响因子：
1.5
通讯作者：
Tomiyama, Akio
中科院分区：
文献类型：
--
作者：
Kataoka, Hironobu;Shinkai, Yusuke;Tomiyama, Akio
采用不同类型的回旋环，研究了回旋环结构对沸水核反应堆蒸汽分离器小型化模型分离器性能的影响。这些实验是用空气和水进行的。利用差压传感器和粒子多普勒测速仪分别测量了管内和扩散器内的压力降以及管内出口液滴的直径和速度。分离器的性能不取决于分离环的形状，而是强烈依赖于分离环与筒壁之间的间隙的宽度。对于不稳定的油膜流动，采用界面摩擦系数很好地估算了管内的压降。可以使用分离器出口处的液滴速度分布来估计携带量。
Effects of pick-off ring configuration on the separator performance of a downscaled model of a steam separator for a boiling water nuclear reactor are examined using various types of pick-off rings. The experiments are conducted using air and water. Pressure drops in a barrel and a diffuser and diameters and velocities of droplets at the exit of the barrel are measured using differential pressure transducers and particle Doppler anemometry, respectively. The separator performance does not depend on the shape of the pick-off ring but strongly depends on the width of the gap between the pick-off ring and the barrel wall. The pressure drop in the barrel is well evaluated using the interfacial friction factor for unstable film flows. Carry-under can be estimated using a droplet velocity distribution at the exit of the separator.