Study On Non-smooth Surface Drag Reduction Performance Of Biomimetic Robot Fish

Autonomous Underwater Vehicle(AUV)has been widely used in various fields and has achieved good results.However,due to its shape characteristics and propulsion,there is still much room for improvement in performance.Based on this,our group will develop a high propulsive efficiency,high mobility,long endurance ability of biomimetic robot fish.In this paper,the method of simulation optimization is used to study the drag reduction method and performance of biomimetic robotic fish.Firstly,the summary of AUV current situation is carried out,and further expounds the main content of this paper including the advantages and disadvantages of the non-smoothing surface drag reduction method.Combined with the development requirements and other factors,choose the groove structure and traveling wave structure as the structure of drag reduction.Secondly,analyze the resistance of the bionic biomimetic robot fish during the voyage,establish the corresponding mathematical model,including the control equation and turbulence model.And according to the research content,select the equation discretization method and appropriate solving method.The third part studies the biomimetic robot fish advantages of the current linear design,and designs the groove structure and traveling wave structure,which were added in the fish three parts.At the same time,the flow field characteristics of the differences between the non-smoothing structure and smooth surface are analyzed at the speed of 6m/s.And through the 0.1m/s-10m/s data analysis.And the fish head and tail whose radial sizes change add traveling wave drag structure,the fish body whose radial size does not change or change a little add groove structure.At last,the different non-smoothing structure are added to the biomimetic robot fish surface,and compared with the flow characteristics of the smooth surface biomimetic robot fish.Analyze the drag reduction performance in the 0.1m/s-10m/s range of speed.In addition,the paper also analyzes the drag reduction performance of the fish body in the flexible swing.The simulation analysis shows that the non-smoothing structure of biomimetic robot fish has good drag reduction performance.