According to the geometric structure when the wheels of the amphibious vehicle were put a-way but not fully enclosed and with openings,different modified drag reduction schemes were pro-posed.Based on CFD software STAR-CCM+,the numerical model was constructed by using overlap-ping grid technology.According to the uncertainty analysis rules of ITTC,the numerical uncertainty was analyzed,and the resistance,pitching and heave data of each scheme were calculated,and com-pared with the data of the original scheme.The results show that the numerical uncertainty satisfies UV＞E,which indicates that the numerical simulation is confirmed at UV level.The results show that adding baffles at different wheel axle positions of amphibious vehicles has great influence on its drag reduction effect and motion posture.The maximum drag reduction rate can reach 25.4％,and the pitch angle changes from 1.8％to 32.8％,which has a great influence on the heave state of am-phibious vehicles.
维普
万方数据