喷雾高度和流量对不同表面结构传热系数影响的实验研究  

Experimental Study on the Influence of Spray Height and Flow Rate on Heat Transfer Coefficients of Different Surface Structures

作　　者：黄诗雯 刘东尧[1] HUANG Shi-wen;LIU Dong-yao(College of Energy and Power Engineering,Nanjing University of Science and Technology,Nanjing,China,Post Code:210094)

机构地区：[1]南京理工大学能源与动力工程学院,江苏南京210094

出　　处：《热能动力工程》2021年第12期62-66,共5页Journal of Engineering for Thermal Energy and Power

摘　　要：设计搭建了喷雾冷却实验台,以去离子水为冷却工质,研究了喷雾高度和流量对光滑表面和方肋表面传热系数的影响。喷雾高度从29 mm降低到10 mm,喷雾流量的变化范围为20~32 L/h。实验结果表明:喷雾高度从29 mm降低到14 mm,表面传热系数增加72%,而从14 mm降低到10 mm,表面传热系数仅增加2.7%;喷雾流量从20 L/h增加到32 L/h,表面温度降低2.4℃,表面传热系数增加10.6%;在相同的实验工况下,方肋表面的传热系数始终大于光滑表面。A spray cooling experimental platform was designed and built,and the influence of spray height and spray flow on the heat transfer coefficients of smooth surface and square rib surface was studied with deionized water as the cooling medium.The spray height decreased from 29 mm to 10 mm,and the variation range of spray flow was between 20 L/h and 32 L/h.The experimental results show that the spray height decreases from 29 mm to 14 mm,and the surface heat transfer coefficient is increased by 72%.While the spray height decreases from 14 mm to 10 mm,the surface heat transfer coefficient is increased by just 2.7%.When the spray flow rate increases from 20 L/h to 32 L/h,the surface temperature is decreased by 2.4℃,and the surface heat transfer coefficient is increased by 10.6%.Under the same experimental conditions,the heat transfer coefficient of the square rib surface is always greater than that of the smooth surface.

关 键 词：喷雾冷却 高度 喷雾流量 光滑表面 方肋表面 传热系数 

分 类 号：TK124[动力工程及工程热物理—工程热物理] TK172[动力工程及工程热物理—热能工程]