聚氟硅氧烷处理的微纳表面水流减阻研究  

Drag Reduction in Channels on Micro-Nano Structured Super-hydrophobic Surface by Poly Fluoride Siloxane

作　　者：曹党超[1] 傅承诵[1] 卢思[1] 姚朝晖[1] 

机构地区：[1]清华大学航空航天学院,北京100084

出　　处：《人工晶体学报》2013年第3期521-524,528,共5页Journal of Synthetic Crystals

基　　金：国家自然科学基金(11272176;51072097)

摘　　要：本文成功制备了聚氟硅氧烷处理的微纳结构表面,并研究了其宏观水流减阻特性。首先,采用包覆工艺对粉煤灰球形微珠进行表面纳米化处理,制备出微纳结构复合微珠颗粒,并利用聚氟硅氧烷对复合微珠进行表面疏水处理;然后以硅橡胶为黏接剂将表面疏水化的复合微珠涂覆于槽道表面,制备出宏观尺度的超疏水性表面槽道。研究表明:聚氟硅氧烷处理的微纳结构粉煤灰复合微珠制备的宏观尺度超疏水性表面槽道与相同尺寸的普通表面槽道相比,当雷诺数Re<1500时,层流减阻为22.6%,而Re>1500时,湍流减阻达到76.5%。The characteristic of flow drag reduction on a large area of micro-nano structured surface which was treated by poly fluoride siloxane was studied. Firstly, the micro-nano structured fly ash particles was prepared by coating process, and treated by poly fluoride siloxane. Secondly, the super-hydrophobic surface channel was achieved by bonding the particles with silicone rubbe. By comparing the channel with super-hydrophobic surface and normal surface, the results showed that when the flow of Reynolds number（Re） was below 1500, the laminar flow drag reduction was 25.6%, and when the Re was above 1500, the turbulent flow reduction could reach to 76.5%.

关 键 词：粉煤灰 微纳结构 超疏水性表面 减阻 

分 类 号：TV134[水利工程—水力学及河流动力学]