湍流流动中鲨鱼皮表面流体减阻研究进展

被引：12

作者：

Brian Dean ^{[1
]}

Bharat Bhushan ^{[1
]}

杨绍琼 ^{[2
]}

李山 ^{[2
]}

田海平 ^{[2
]}

李一凡 ^{[2
]}

机构：

[1] Nanoprobe Laboratory for Bio- and Nanotechnology and Biomimetics (NLBB),Ohio State University

[2] 天津大学机械工程学院力学系,天津大学流体力学实验室沟槽减阻研究小组

来源：

力学进展 | 2012年 / 42卷 / 06期

关键词：

鲨鱼皮肤; 减阻; 沟槽; 仿生学; 湍流流动; 疏水性;

D O I：

暂无

中图分类号：

O357.5 [湍流（紊流）];

学科分类号：

080103 ; 080704 ;

摘要：

快速游动的鲨鱼,其皮肤表面沿流动方向有序地排列着沟槽状结构,人们认为这种结构能在湍流流动中减小表面摩擦阻力.人们仿真这种生物结构来进行实验研究和应用,通过复制和改善鲨鱼皮肤表面沟槽状结构,使得摩擦阻力最大减小了近10%.在实验和模拟仿真中,人们不断讨论和研究湍流流动阻力的形成机制和沟槽减阻的理论特性.本文综述了沟槽减阻理论特性的一些研究方法,并且归纳定义了沟槽减阻最优几何形状及其尺寸;详细考虑流体流动的特点,给出了一种用来选择最优沟槽形状及其尺寸的方法;综述了目前的沟槽加工制造技术.由于鲨鱼皮肤表面存在少量黏液,从仿生学的角度,文章最后综述并展望了通过局部应用疏水性材料来改变沟槽附近流场属性,从而达到更大程度上减小阻力的目标.

引用

页码：821 / 836

页数：16

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