Analysis and prediction of single-phase and two-phase cooling characteristics of intermittent sprays
Analysis and prediction of single-phase and two-phase cooling characteristics of intermittent sprays
复制标题
间歇喷雾单相和两相冷却特性分析与预测
DOI：
10.1016/j.ijheatmasstransfer.2018.12.146
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发表时间：
2019-04
影响因子：
5.2
通讯作者：
Zhichao Yin
中科院分区：
文献类型：
--
作者：
Xiao Zhao;Bo Zhang;Xiuzhi Xi;Zhichao Yin
间歇喷雾冷却是一种主动的流量控制技术，可以改善喷雾冷却性能，提高冷却剂的使用效率，降低泵浦功率消耗。然而，间歇喷雾的冷却特性和冷却机理还没有得到充分的研究，特别是在核态沸腾区域和临界热流区。模拟间歇喷雾冷却的方法是不够的，并且需要针对每个操作条件进行昂贵且费力的喷雾动态特性测量。本文通过实验研究了频率和体积流量对单相区和两相区间歇喷雾换热特性的影响。结果表明，体积流量和频率对换热均有影响。与沸腾曲线和临界热流密度(CHF)的结果相对应，连续两次喷射循环的互换影响将增强液滴冲击和喷雾壁面干扰。然而，随着频率的增加，这种影响变得更加显著，并且随着体积通量的增加，这种影响逐渐被抑制。在此基础上，提出了间歇喷雾换热的机理和模型。引入代表冲击频率和体积流量之间相对影响的Strouhal数来描述间歇性特征，并在此基础上建立了单相、核沸腾和CHF的关联式。
Intermittent spray cooling is an active flow control technique to enhance spray cooling performance, increase the efficiency of coolant usage, and reduce pumping power consumption. However, the cooling characteristics and mechanism of intermittent sprays have not been investigated sufficiently, especially in the nucleate boiling region and critical heat flux region. Methods that model intermittent spray cooling are insufficient and require expensive and laborious spray dynamic characteristics measurements for each operating condition. In this study, experiments were performed to investigate the effect of frequency and volumetric flux on the heat transfer characteristics of intermittent sprays at both the single- and two-phase regimes. The results demonstrate that both the volumetric flux and frequency affect the heat transfer. The commutative impact of two consecutive injection cycles would enhance the drop impact and spray-wall interference, corresponding to the results of the boiling curve and critical heat flux (CHF). However, this impact becomes more remarkable with increasing frequency and is suppressed gradually as the volumetric flux increases. Based on these results, the mechanism and model on heat transfer in an intermittent spray are proposed. The Strouhal number, representing the relative effects between the impact frequency and volumetric flux, is introduced to account for intermittent features, based upon which correlations of single phase, nucleate boiling, and CHF are developed.
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DOI：
10.1109/eptc.2012.6507150
发表时间：
2012-12
期刊：
2012 IEEE 14th Electronics Packaging Technology Conference (EPTC)
影响因子：
--
作者：
S. Somasundaram;A. Tay
通讯作者：
S. Somasundaram;A. Tay
DOI：
10.1016/j.ijthermalsci.2013.06.008
发表时间：
2013-12-01
影响因子：
4.5
作者：
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通讯作者：
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DOI：
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发表时间：
1989-09
期刊：
Journal of Heat Treating
影响因子：
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作者：
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通讯作者：
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DOI：
10.1201/9781420041064.ch2
发表时间：
2002-08
期刊：
Di 1 jun yi da xue xue bao = Academic journal of the first medical college of PLA
影响因子：
--
作者：
G. Naterer
通讯作者：
G. Naterer
影响因子：
5.2
作者：
K. A. Estes;I. Mudawar
通讯作者：
K. A. Estes;I. Mudawar