Study on drag reduction characteristics of surface microstructure of underwater bionic robot

Minghui Zhang; Guohao Pei; Chuanbao Wang; Shuai Meng

doi:10.1117/12.2686360

10 August 2023 Study on drag reduction characteristics of surface microstructure of underwater bionic robot

Minghui Zhang, Guohao Pei, Chuanbao Wang, Shuai Meng

Proceedings Volume 12759, International Conference on Automation Control, Algorithm, and Intelligent Bionics (ACAIB 2023); 127593P (2023) https://doi.org/10.1117/12.2686360
Event: 2023 3rd International Conference on Automation Control, Algorithm and Intelligent Bionics (ACAIB 2023), 2023, Xiamen, China

Abstract

In order to improve the cruising speed and range of the biomimetic fish underwater robot, reduce energy consumption, a microstructure is added to the lower surface near the robot head to study the influence of microstructure on the resistance characteristics of the robot. Firstly, transverse and longitudinal triangular grooves were added to the lower surface of the robot to analyze the resistance characteristics. Compared with smooth surfaces, the total drag reduction rate of longitudinal microstructures is 12.4%, and that of transverse grooves is 11.2%. It was found that the drag reduction effect of longitudinal grooves is better than that of transverse grooves. Then, numerical simulations were conducted on three types of microstructures: V-shaped, triangular, and trapezoid shaped. When the dimensionless size of the microstructure are h = 13 and s = 17, the triangular microstructure has the best drag reduction effect, with a total drag reduction rate of 12.4%. The V-shaped drag reduction rate is 11.4, and the trapezoidal drag reduction rate is 6.3%. Finally, the drag reduction mechanism of the microstructure is given by analyzing the velocity distribution and wall shear stress of the flow field around the microstructure.

Citation Download Citation

Minghui Zhang, Guohao Pei, Chuanbao Wang, and Shuai Meng "Study on drag reduction characteristics of surface microstructure of underwater bionic robot", Proc. SPIE 12759, International Conference on Automation Control, Algorithm, and Intelligent Bionics (ACAIB 2023), 127593P (10 August 2023); https://doi.org/10.1117/12.2686360

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