Enhanced heat spray cooling with a moving nozzle
Enhanced heat spray cooling with a moving nozzle
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通过移动喷嘴增强热喷雾冷却
DOI：
10.1016/j.applthermaleng.2018.06.025
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发表时间：
2018-08
影响因子：
6.4
通讯作者：
Xu Z G
中科院分区：
文献类型：
--
作者：
Lamini O;Wu R;Zhao C Y;Xu Z G
为了解动喷嘴热喷雾冷却的热性能，进行了实验研究。该试验台包括一个开环系统，该系统带有一个用于喷嘴沿矩形表面运动的步进电机。平面和结构表面都被采用。实验结果表明，喷嘴与表面的距离和喷嘴的运动速度对温度分布都有影响。低流量条件下的温度变化小于高流量条件下的温度变化。对于结构表面，翅片越短，温度变化越小。在低热流密度下，平面传热系数高于强化表面。这是因为由于毛细作用，与增强表面上的厚水膜相比，平坦表面上的薄水膜。然而，在高热流密度下，由于翅片面积的增加导致水膜蒸发速率的增加，强化表面的换热系数高于平坦表面。
Experimental studies were performed to understand the thermal performance of the heat spray cooling with a moving nozzle. The test-rig included an open loop system with a stepping motor for the nozzle movement along the rectangular surfaces. Both the flat and structured surfaces were employed. The experimental results revealed that both the nozzle to surface distance and the nozzle moving speed have an influence on the temperature distribution. The temperature variance was smaller at the lower flow rate than at the higher flow rate. For the structured surface, the temperature variance was lower for the shorter fins. At the low heat flux, a higher heat transfer coefficient was observed on the flat surface than on the enhanced surfaces. This is because of the thin water film on the flat surface as compared to the thick water film on the enhanced surfaces due to the capillary action. However, at the high heat flux, the enhanced surfaces showed a higher heat transfer coefficient than the flat surface due to the higher evaporation rate from the water film induced by the increased area of the fins.
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影响因子：
2.2
作者：
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通讯作者：
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影响因子：
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作者：
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作者：
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影响因子：
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作者：
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