疏水表面减阻环带实验研究

宋保维; 郭云鹤; 罗荘竹; 徐向辉; 王鹰

doi:10.7498/aps.62.154701

摘要

针对疏水功能材料在流动减阻方面的应用, 选取典型不同粗糙度、不同疏水性的功能涂层表面, 通过新型环带实验研究了其阻力特性, 并获得了相应的扭矩和减阻率曲线. 实验采用测量圆盘带动环带旋转时的扭矩的方法间接计算环带表面所受的摩阻, 突破了传统微管道实验在尺度上的限制, 避免了水洞实验中影响因素过多的弊端, 对疏水材料的宏观应用有着重要意义. 实验证实了在宏观尺度下疏水涂层在低雷诺数时的减阻作用; 但在高雷诺数时, 减阻作用减弱, 甚至部分涂层有增阻作用, 而压差阻力的迅速增大是造成增阻的主要原因. 通过对比分析认为: 低雷诺数时, 疏水特性对于减阻效果影响更大; 而高雷诺数时, 粗糙度起更大作用, 甚至可能起到增阻的反效果.

关键词:

疏水表面 /
环带实验 /
粗糙度 /
减阻

Abstract

For the drag reduction application of hydrophobic material, the drag characteristic of typical surface with different roughness or different hydrophobicity is studied by a new annulus experiment. The corresponding torque characteristic and drag reduction rate curve are acquired. The experiment indirectly calculate the surface friction of the annulus by measuring the torque of disk driving annulus and breaks through the limitation of scale in traditional microchannel experiment, avoids the drawbacks of too many influencing factors in water-tunnel experiment, and has important significance in macro application of hydrophobic material. The drag reduction effect of hydrophobic surface is proved at low Reynolds number in macroscale; however, at high Reynolds number, it will be weakened or even changed to drag producing effect, and the rapid increase of pressure drag is the major reason for increasing resistance. Through comparative analysis we find that at low Reynolds number, there will be greater effect of hydrophobicity for drag reduction; where as at high Reynolds number, the roughness will play a greater role, and may even be counterproductive to the increasing resistance.

Keywords:

作者及机构信息

1.
西北工业大学, 航海学院, 西安 710072;

2.
中国科学院重庆绿色智能技术研究院, 重庆 401122;

3.
中国科学院兰州化学物理研究所, 兰州 730000

基金项目: 国家自然科学基金重点项目(批准号: 50835009);国家自然科学基金 (批准号: 51109178) 和陕西省自然科学基础研究计划(批准号: 2010JQ1009)资助的课题.

Authors and contacts

1.
College of Marine, Northwestern Polytechnical University, Xi’an 710072, China;

2.
Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 401122, China;

3.
Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China

Funds: Project supported by the Key Program of the National Natural Science Foundation of China (Grant No. 50835009), the National Natural Science Foundation of China (Grant No. 51109178), and the Natural Science Basic Research Plan in Shanxi Province of China (Grant No. 2010JQ1009).

参考文献

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施引文献

[1]	Feng L, Li S H, Li Y S, Li H J, Zhang L J, Zhai J, Song Y L, Liu B Q, Jiang L, Zhu D B 2002 Adv. Mater. 14 1857
[2]	Luo Z Z, Zhang Z Z, Hu L T, Liu W M, Guo Z G, Zhang H J, Wang W J 2008 Adv. Mater. 20 970
[3]	Zhang M, Geng X G, Zhang Y, Wang X N 2012 Acta Phys. Sin. 61 194702 (in Chinese) [张盟, 耿兴国, 张瑶, 王晓娜 2012 61 194702]
[4]	Mei D J, Fan B C, Huang L P, Dong G 2010 Acta Phys. Sin. 59 6786 (in Chinese) [梅栋杰, 范宝春, 黄乐萍, 董刚 2010 59 6786]
[5]	Saison T, Peroz C, Chauveau V, Berthier S, Sondergard E, Arribart H 2008 Bioinsp. Biomim. 3 046004
[6]	Xu F Y, Liu L J, Tan J, Liu B, Mei S 2012 Acta Phys. Chim. Sin. 28 693 (in Chinese) [徐飞燕, 刘丽君, 覃健, 刘贝, 梅双 2012 物理化学学报 28 693]
[7]	Wang X L, Liu X J, Zhou F, Liu W M 2011 Chem. Commun. 47 2324
[8]	Wang D A, Liu Y, Yu B, Zhou F, Liu W M 2009 Chem. Mater. 21 1198
[9]	Tretheway D, Meinhart C 2004 Phys. Fluids 16 1509
[10]	Lauga E, Brenner M P, Stone H A 2005 Handbook of Experimental Fluid Dynamics (New York: Springer) Chap. 15
[11]	Kevin J, Daniel M, Brent W W 2010 Int. J. Heat Mass Transfer. 53 786
[12]	Chiu-On Ng, Henry C W Chu, Wang C Y 2010 Phys. Fluids 22 102002
[13]	Ou J, Perot B, Rothstein J P 2004 Phys. Fluids 16 4635
[14]	Huang Q G, Pan G, Wu H, Hu H B, Song B W 2011 J. Exp. Fluid Mech. 25 21 (in Chinese) [黄桥高, 潘光, 武昊, 胡海豹, 宋保维 2011 实验流体力学 25 21]
[15]	Wang W X, Shi J, Qiu B, Li H B 2010 Acta Phys. Sin. 59 8371 (in Chinese) [王文霞, 施娟, 邱冰, 李华兵 2010 59 8371]
[16]	Choi C H, Kim C J 2006 Phys. Rev. Lett. 96 066001

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