雾化特性及系统参数对闭式喷雾冷却系统性能的影响

发布时间：2018-04-17 05:32

本文选题：喷雾冷却 + 雾化参数　；参考：《低温工程》2017年06期

【摘要】：搭建了以R22为冷却介质的闭式喷雾冷却实验台,通过更换3种不同的喷嘴,分析对比了不同喷嘴类型和喷雾高度下传热性能的变化规律。实验结果表明:选择喷嘴时必须同时考虑喷雾流量和雾化角度的影响;雾化角较小的喷嘴在低高度下适用性较好。同时,研究了系统参数如过冷度和充注压力对喷雾冷却传热性能的影响,得出过冷度对喷雾冷却性能有一定促进作用,但过冷度越大,促进效果越弱;表面传热系数和表面温度均随充注压力的升高而升高,因此高充注压力不适用于需严格控制温度的表面冷却。
[Abstract]:A closed spray cooling test rig with R22 as cooling medium was set up. By replacing three different nozzles, the variation of heat transfer performance under different nozzle types and spray height was analyzed and compared.The experimental results show that the influence of spray flow rate and atomization angle must be taken into account in the selection of nozzles, and that the nozzle with smaller atomization angle has better applicability at low altitude.At the same time, the effects of system parameters such as supercooling degree and filling pressure on the heat transfer performance of spray cooling are studied. It is concluded that the supercooling degree has a certain effect on the spray cooling performance, but the greater the degree of undercooling, the weaker the promoting effect.The surface heat transfer coefficient and surface temperature increase with the increase of filling pressure, so the high charge pressure is not suitable for surface cooling with strict temperature control.
【作者单位】：南京工业大学城市建设学院;南京航空航天大学航空宇航学院;
【基金】：国家自然科学基金项目(51508267) 江苏省自然科学基金项目(BK20130946) 2017年度江苏省研究生培养创新工程-江苏省研究生科研计划(KYCX17_0929)
【分类号】：TB657

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