HFC134a喷雾闪蒸冷却换热特性的实验研究  

Experimental Study on Heat Transfer Performance of HFC134a Spray Flash Cooling

作　　者：程文龙[1] 章玮玮[1] 陈华[1] 王领华[2] 吕建伟[2] 李彦良[2] 

机构地区：[1]中国科学技术大学热科学和能源工程系,合肥230027 [2]中国运载火箭技术研究院研究发展中心,北京100076

出　　处：《航天器工程》2013年第5期56-60,共5页Spacecraft Engineering

基　　金：国家自然科学基金(51376169)

摘　　要：喷雾闪蒸冷却由于可以在较小的工质流量下实现很高的散热能力,在高热流密度散热、航天器热控和热防护等领域具有广阔的应用前景。本文建立了喷雾闪蒸冷却实验系统,对环境压力下以HFC134a为工质的喷雾闪蒸冷却换热特性进行了实验研究,得出了喷雾闪蒸冷却的换热特性曲线、临界热流密度(critical heat flux,CHF)以及被冷却表面温度随喷雾高度和流量的变化曲线,分析了适用于热控的最佳喷雾高度和流量。The spray flash cooling technology can obtain high cooling capacity with small flow rate, so it has broad application prospect in the field of high heat flux removal, thermal control and thermal protection in spacecraft. A spray flash cooling experimental system is established. The spray flash cooling heat transfer characteristics curve and critical heat flux （CHF） are obtained by experimental study on heat transfer performance of HFC134a spray flash cooling at atmospheric pressure. The experiment also gives surface temperature curve with the spray height and flow rate. The optimun spray height and flow rate in the thermal control have been analyzed.

关 键 词：喷雾闪蒸冷却 热控 喷雾高度 临界热流密度 

分 类 号：V416.4[航空宇航科学与技术—航空宇航推进理论与工程]