| The total area of the earth’s oceans is about 360 million square kilometers,containing rich in oil and gas resources,rare earth resources and mineral resources.With the increasing exploration and development of the ocean,various underwater robots are widely used in ocean engineering operations.Among them,the micro-streamlined underwater robot has the advantages of flexibility,good submersible,remote control and low cost,which plays an important role in the actual engineering operations.In order to design the parameter design and simulate the streamlined shell and propeller.This paper first expounds the design method,design requirements and basic principles of micro-streamlined robot.Several methods of shell line type are proposed,and four line types are selected as the bus of shell design through comparative analysis.The shell was modeled using Solidworks software and theoretically analyzed for its hydrodynamic properties and mechanical properties.In order to accurately simulate the real state of the robot shell during underwater navigation,the underwater motion of the shell is simulated by Fluent software.By comparing the surface pressure distribution and the total resistance value,we determine the best design of linear rotation for shell.Estimate the thrust required by the propeller according to the shell underwater navigation speed and resistance,and the propeller is parameterized in combination with the atlas design method.The best design parameters of the design propeller were determined by comparing the MAU 4 series propeller atlas,and the propeller was strength checked and vacutered.After determining the propeller design parameters,the accurate modeling of the Prop Cad modeling software.Then,the pressure distribution of the propeller and the propeller deformation were analyzed by Fluent.The thrust coefficient,torque coefficient and water flow efficiency and compare the simulation results with the regression polynomial calculation.The results show that the errors between the simulation results are small,which proves the accuracy of the simulation model.Finally,the propeller pitch ratio and the disk surface ratio are optimized,and the pitch ratio and the disk surface ratio are analyzed by the control variable method. |
