本项目提出采用表面活性剂强化喷雾冷却散热性能的方法，从理论和实验两个方面系统深入地研究表面活性剂对喷雾冷却传热强化机理及选择准则。首先，在对表面活性剂对工质各主要物性参数影响的实验研究基础上，与理论分析相结合，研究表面活性剂对喷雾过程影响的物理规律，得出表面活性剂对喷雾特性影响的准则关系；利用可视化实验、定量实验和理论分析相结合的方法，重点研究液滴冲击发热壁面时，表面活性剂对液滴特性、液滴铺展流动性能以及沸腾性能的影响，并得出相应的准则式；利用实验方法，系统研究表面活性剂对喷雾冷却传热性能及强化效果的影响；最后，综合上述研究结果，建立喷雾冷却传热的理论模型，分析表面活性剂对喷雾冷却散热强化的影响机理，得出相应的传热准则式及表面活性剂的选择准则。该项目不仅为喷雾冷却散热强化提供了一种可能的新方法，而且，其预期研究成果对于深入研究表面活性剂在其他传热传质过程中的影响也具有重要的参考价值。

To enhance the heat transfer of spray cooling, a novel method is proposed by adding surfactant to the cooling fluid in this project, and both theoretical and experimental work is performed to investigate the mechanism of heat transfer enhancement of spray cooling by adding surfactant, specially give the selection criteria of the surfactant. Firstly, by the experimental study on the thermal properties of the cooling fluid with surfactant, the effect of surfactant on spray’s characteristics was focused to obtain the related spray criterion’s relation expressions. Then, by combining experimental measurement and visualization experiment with theoretical modeling, the effect of surfactant on the flow properties and boiling heat transfer when the spray droplets clash the heating surface is investigate to obtain the related heat transfer criterion’s relation expressions. Also, the effect of surfactant on heat transfer performance and enhancement of spraying cooling can be obtained by the above experiment. Finally, based on the previous studies, the enhancement mechanism of surfactant on spray cooling is analyzed by the built heat transfer model of spray cooling, and the corresponding heat transfer criterion and surfactant selection criterion are obtained. This project not only can provide a novel method to spray cooling for enhancing heat transfer, but also will give significant reference to study on the enhancement mechanism of surfactant in other heat transfer processes.