形态/柔性材料二元仿生耦合增效减阻功能表面的设计与试验

通过研究水生生物在流体介质运动中,皮肤可随着流体载荷的变化而发生动态变化,并与皮下组织特有的非光滑结构形成动态耦合,形成具有特定功能的表面的现象,并依据仿生学相似原理,提出一种形态/柔性材料二元耦合功能表面设计的新思想,称之为仿生耦合功能表面(BCFS),该功能表面由不同属性的双层材料构成,利用面层材料的弹性变形以及面层材料与基底材料表面上仿生非光滑结构的耦合,对流体进行主动控制,实现增效减阻功能。探索了将这种仿生耦合功能表面(BCFS)在典型流体机械-泵上面的实现方法,并以效率为目标,进行了仿生耦合功能表面增效减阻功能的试验,试验结果表明,采用这种耦合功能表面的仿生耦合水泵,效率提高了5%以上。

Design and experiment of bionic coupling functional surface caused by dual factors of form and flexible material

When aquatic creatures move in fluid medium,the elastic deformations of their epidermis vary with the fluid load.The deformations couple with the special non-smooth structures of the subcutaneous tissues under certain conditions to form special coupling function surfaces.Based on the above biological coupling phenomenon and bionics similar principle,a new design concept of dual factors coupling functional surface caused by form and flexible material is proposed.This kind of surface is called Bionic Coupling Functional Surface(BCFS).The BCFS is composed of two layers of materials with different properties.The deformation of the surface layer and the coupling function between surface layer and the subcutaneous layer with non-smooth structure are utilized to actively control the fluid medium and achieve efficiency enhancement.The implementation of the BCFS on typical fluid pump is explored.Experiment results show that with BCFS the pump efficiency is increased by 5%.