Wu Liyan, Luo Guihang, He Feifan, Chen Lei, Wang Siqi, Fan Xiaoguang
College of Engineering, Shenyang Agricultural University Shenyang 110866 China
RSC Adv. 2022 Aug 11;12(34):22226-22235. doi: 10.1039/d2ra04073e. eCollection 2022 Aug 4.
Drag reduction is a key problem in marine vehicles and fluid transportation industries. Reducing drag strategies and mechanisms need to be further investigated. To explore a bionic approach for reducing flow resistance, experimental and numerical simulation research was conducted to study the drag reduction characteristics of the surface microstructure. In this study, the large-area flexible surface of the bionic loach scale was prepared by the template method of one-step demoulding. The water tunnel experiment results show that compared with the smooth surface, the drag reduction rate of the bionic surface ranges from 9.42% to 17.25%. And the numerical simulation results indicate that the pressure gradient and low-speed vortex effect created by the bionic loach scales can effectively reduce the friction drag. The results of experimental data and numerical simulation both prove that the bionic scales of can achieve the underwater drag reduction function. This research provides a reference for drag reduction in marine industries and fluid delivery applications.
减阻是船舶和流体运输行业的一个关键问题。减少阻力的策略和机制需要进一步研究。为了探索一种仿生减阻方法，进行了实验和数值模拟研究，以研究表面微观结构的减阻特性。在本研究中，采用一步脱模模板法制备了大面积的仿生泥鳅鳞片柔性表面。水洞实验结果表明，与光滑表面相比，仿生表面的减阻率在9.42%至17.25%之间。数值模拟结果表明，仿生泥鳅鳞片产生的压力梯度和低速涡旋效应能有效降低摩擦阻力。实验数据和数值模拟结果均证明，仿生鳞片能够实现水下减阻功能。该研究为海洋工业和流体输送应用中的减阻提供了参考。
