Droplet impact on a concave wall in a rotating gas flow field
Droplet impact on a concave wall in a rotating gas flow field
复制标题
旋转气流场中液滴对凹壁的冲击
DOI：
10.1016/j.icheatmasstransfer.2022.106131
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发表时间：
2022-06
影响因子：
7
通讯作者：
Zhen Li
中科院分区：
文献类型：
--
作者：
Shuo Ouyang;Zhenqin Xiong;Jiyun Zhao;Zhen Li
旋转流场中液滴撞击凹壁的行为对核反应堆旋流叶片分离器和螺旋形燃料棒束至关重要。为揭示旋转流场中液滴与凹壁的碰撞机理，研制了旋流叶片分离器试验台。利用高速摄像机在较宽的直径（0.2mm < d <4.0mm）和入口气流速度（2.7m·s-1 <Vg，in <6.5m·s-1）范围内记录了液滴与直径为130 mm的凹壁的碰撞行为。通过数值模拟得到了液滴撞击凹壁前的运动轨迹和速度。观察到四种液滴撞击结果，即，下滑摊铺、水平梭滑破、上滑破、粘连破。得到了这四种模式在Wer-Re r图上的分布，并提出了预测分界线的关联式。分析了入口气流速度和液滴直径对液滴碰撞位置和扩散因子的影响。入口气流速度对液滴撞击结果和扩展因子的影响最为显著。
The behavior of liquid droplet impact on the concave wall in a rotating flow field is vital for swirl-vane separators and spiral fuel bundles in nuclear reactors. To reveal the collision mechanism of the droplet on the concave wall in a rotating flow field, a test rig for swirl vane separators is developed. The impacting behaviors of droplets on a concave wall with a diameter of 130 mm are recorded by a high-speed camera over wide ranges of diameters (0.2 mm < d < 4.0 mm) and the inlet gas velocities (2.7 m·s −1 < V g, in < 6.5 m·s −1 ). The trajectory and the velocity of the droplet before impact on the concave wall are obtained by numerical simulation. Four kinds of droplet impacting outcomes are observed, i.e., downward sliding spreading, horizontal shuttle sliding breaking, upward sliding breaking, and adhesion breaking. The distribution of these four patterns in We r -Re r diagram is obtained and the correlations for predicting dividing lines are developed. Moreover, the effects of the inlet gas velocity and the droplet diameter on the droplet impacting location and the spreading factors are analyzed. The inlet gas velocity has the most significant effect on the droplet impact outcome and the spreading factors.
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影响因子：
3.2
作者：
Š. Šikalo;C. Tropea;E. Ganic
通讯作者：
Š. Šikalo;C. Tropea;E. Ganic
影响因子：
1.7
作者：
Z. Xiong;Mingchao Lu;Yazhou Li;H. Gu;Xu Cheng
通讯作者：
Z. Xiong;Mingchao Lu;Yazhou Li;H. Gu;Xu Cheng
DOI：
10.1002/9783527684724.ch2
发表时间：
2015-12
期刊：
--
影响因子：
--
作者：
E. Furlani
通讯作者：
E. Furlani
影响因子：
2.2
作者：
Amrit Kumar;D. K. Mandal
通讯作者：
Amrit Kumar;D. K. Mandal
影响因子：
5.5
作者：
Andrade, R.;Skurtys, O.;Osorio, F.
通讯作者：
Osorio, F.