压力与流量对喷雾冷却换热特性的影响

工程热物理学报 , 2009, 30(12): 2059-2061.

压力与流量对喷雾冷却换热特性的影响

谢宁宁 ^1, , 陈东芳 ^2, , 胡学功 ^3, , 唐大伟 ^4, , 聂雪磊 ^5,

1.中国科学院工程热物理研究所,北京,100190

2.中国科学院工程热物理研究所,北京,100190

3.中国科学院工程热物理研究所,北京,100190

4.中国科学院工程热物理研究所,北京,100190

5.中国科学院工程热物理研究所,北京,100190

基金项目: "863"重点项目"5 kW 全固态激光器"的子课题

关键词：喷雾冷却 , 入口压力 , 有效流量 , 喷嘴与加热表面的距离

EFFECTS OF PRESSURE AND FLOW FLUX ON HEAT TRANSFER IN SPRAY COOLING

XIE Ning-Ning ^1, , CHEN Dong-Fang ^2, , HU Xue-Gong ^3, , TANG Da-Wei ^4, , NIE Xue-Lei ^5,

1.中国科学院工程热物理研究所,北京,100190

2.中国科学院工程热物理研究所,北京,100190

3.中国科学院工程热物理研究所,北京,100190

4.中国科学院工程热物理研究所,北京,100190

5.中国科学院工程热物理研究所,北京,100190

Keywords： spray cooling , the pressure in nozzle , effective flux , spraying height

本文是在封闭式喷射腔内,以一次蒸馏水作为工质,结合本文所给出的喷嘴高度 H 与有效流量 G' 相互关系的理论模型,对微喷嘴的工质入口压力 P 和工质有效流量 G' 对喷雾冷却的换热特性的影响进行了实验研究.研究结果表明,入口压力 P 对换热效果的影响非常小,而有效流量 G' 对换热效果的影响很大,并且存在一个能使换热效果达到最好的有效流量值.

Effects of pressure P in nozzle and effective flow flux G' of working fluid on the heat transfer in spray cooling are studied in a closed spray chamber. The effective flow flux G' on the heating surface is obtained based on the measurements of spraying height H. The results show that the pressure P has little influence on heat transfer while the effective flow flux G' exerts a great influence on heat transfer. It also indicates that a certain effective flux exists for optimizing heat transfer.

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