流体机械

2020, v.48;No.582(12) 58-61+79

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分散剂对纳米流体喷雾冷却传热特性影响的试验研究
Experimental Study on the Effect of Dispersants on the Spray Cooling Heat Transfer of Nano?uid

李依一;程文龙;赵锐;
Li Yiyi;Cheng Wenlong;Zhao Rui;Department of Thermal Science and Energy Engineering,University of Science and Technology of China;

摘要(Abstract):

混合不同浓度的3类分散剂——Tween 20,PVP,SDS,和10 nm氧化铝纳米颗粒流体作为工质,开展喷雾冷却传热特性的试验研究,分析分散剂种类和浓度对传热效果的影响。研究结果表明:分散剂能够提升纳米流体的喷雾冷却传热能力,每一种分散剂均存在最佳浓度使对应的喷雾冷却强化效果最好。分散剂Tween 20的最佳浓度为0.45×10~(-5),比纳米颗粒水溶液平均换热系数提升了16.5%,分散剂PVP的最佳浓度为3×10~(-4),平均换热系数提升了19.1%,SDS的最佳浓度为8×10~(-4),平均换热系数提升了64.1%。3种分散剂中,SDS的传热强化效果最佳,这与其作为阴离子分散剂的分散原理有关。
In order to analyze the effect of dispersant types and concentrations on the spray cooling heat transfer of nanofluid,three kinds of dispersants of different concentrations,Tween 20,PVP,SDS,were respectively mixed with 10 nm nanoparticles of alumina fluid as working medium of spray cooling experiments.The results indicate that the dispersant can promote the spray cooling heat transfer of nanofluids.Each kind of dispersant has optimal concentration to make the corresponding spray cooling enhancement effect best.The optimal concentrations of Tween 20,PVP,SDS were respectively 0.45×10~(-5),3×10~(-4),8×10~(-4),and compared with nanoparticle aqueous solution,the average heat transfer coefficient was increased by 16.5%,19.1%,64.1%.Among the three dispersants,SDS has the best heat transfer enhancement effect,which is related to its dispersion principle as anion dispersant.

关键词(KeyWords): 纳米流体;喷雾冷却;分散剂
nanofluid;spray cooling;dispersant

Abstract:

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基金项目(Foundation): 国家自然科学基金项目(51876198)

作者(Author): 李依一;程文龙;赵锐;
Li Yiyi;Cheng Wenlong;Zhao Rui;Department of Thermal Science and Energy Engineering,University of Science and Technology of China;

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