喷雾冷却系统稳态特性的实验研究

设计了一套可观察喷雾过程中的喷雾锥角、雾化效果、发热面上液膜及腔内气液分布状态的实验系统。验证了喷雾冷却技术解决极高热流密度散热问题的能力。通过实验研究了该系统的传热性能与稳态运行特性,分析了流量、喷嘴压降、喷雾高度、热流密度、热沉温度及回流液体过冷度等因素对系统传热性能和特性的影响。

Steady-state Characteristics of a Closed-loop Spray Cooling System

A visual closed-loop spray cooling test system was established for high heat flux cooling,with which the experimental phenomena in the visual chamber could be directly observed.The steady-state characteristics of the spray cooling system were investigated.In the test,the spray cone,angle,atomization effect,liquid film on the heat rejecting surface,and vapor/liquid interface in the spray chamber could be observed through the visual shell of the spray chamber.The effects of the heat flux value,the spray distance,the sink temperature,the subcooling degree of the return liquid on the heat transfer performance and the evaporation efficiency of the spray liquid were analyzed.