化工学报2017，Vol.68Issue(1)：63-71,9.DOI:10.11949/j.issn.0438-1157.20161079
不同截面形状超疏水微肋阵内对流换热特性
Convection heat transfer characteristics of super-hydrophobic micro pin-fins with different cross-sectional shapes
摘要
Abstract
Super-hydrophobic micro pin-fins with circular, diamond and elliptical cross-sectional shapes were prepared by solidifying hydrophobic layers involved nano-particles on the flowing surfaces, and the flow resistance coefficient as well as Nusselt number in super-hydrophobic micro pin-fins was measured. The integrated effect of super-hydrophobic surface on resistance reduction and heat transfer enhancement was explored by analyzing the integrated heat transfer enhancement factor ε. The results indicated that the friction resistance coefficient was reduced at 72%, 66%and 70%in three kinds of micro pin-fins with super-hydrophobic walls and different cross-sectional shapes. Besides, although Nu in all three kinds of micro pin-fins was reduced, the value of the decrease was less than 44%, 17%and 47%under the high heating power in present research. In addition, the super-hydrophobic micro pin-fins with diamond cross-sectional shape had good comprehensive heat transfer enhancement performance under the high heating power, and the value of ε is higher than 1.17 in the range of Re<1200.关键词
微肋阵/超疏水性/减阻率/对流换热/综合传热强化因子Key words
micro pin-fins/super-hydrophobic/resistance reduction ratio/convective heat transfer/integrated heat transfer enhancement factor分类
能源科技引用本文复制引用
祝叶,管宁,李栋,赵孝保,刘志刚..不同截面形状超疏水微肋阵内对流换热特性[J].化工学报,2017,68(1):63-71,9.基金项目
国家自然科学基金项目（51306107）；江苏省自然科学基金青年项目(BK20150979)；山东省重点研发计划项目（2016GGX104004）。 （BK20150979）
