The onset of significant void in up-flow boiling of water at low pressure and velocities
The onset of significant void in up-flow boiling of water at low pressure and velocities
复制标题
水在低压和低速下上流沸腾时出现明显的空隙
DOI：
10.1016/0017-9310(87)90218-3
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发表时间：
1987
影响因子：
5.2
通讯作者：
D. Poirier
中科院分区：
文献类型：
--
作者：
J. Rogers;M. Salcudean;Z. Abdullah;D. Mcleod;D. Poirier
在低压（约150 kPa）和低速（< 0.5 ms−1）条件下，水向上流动沸腾时显著空泡（OSV）起始点的实验结果表明，随着液体进口速度的增加，显著空泡的过冷度增加。根据Saha和Zuber OSV相关，在实验条件下，由于Peclet数小于70000，速度的影响应该是不存在的。在较高的Peclet数下，经验证据和现有的相关关系和模型表明，随着液体速度的增加，OSV下的过冷度降低。根据温特顿关于气泡偏离的发现，建立了一个模型，该模型预测了这些实验中观察到的OSV过冷随速度的变化趋势，以及其他实验在更高速度下观察到的相反趋势。
Results of experiments to determine the point of onset of significant void (OSV) for up-flow boiling of water at low pressure ($ ̃ 150 kPa) and low velocities (< 0.5 ms− 1) show that the sub-cooling at OSV increases as liquid inlet velocity increases. According to the Saha and Zuber OSV correlation there should be no effect of velocity under the experimental conditions since the Peclet number is less than 70 000. At higher Peclet numbers, empirical evidence and existing correlations and models show that the subcooling at OSV decreases as liquid velocity increases. A model, based on the findings of Winterton on bubble departure, has been developed which predicts the observed trend of sub-cooling at OSV with velocity in these experiments as well as the opposite trend observed by others at higher velocities.