Numerical analysis on hydrodynamic performance and hydrofoil optimization for amphibious vehicles

A numerical approach is established to study the hydrodynamic performance using an amphibious transport vehicle (ATV) as a research object. Numerical calculation based on Reynolds average Navier–Stokes method studied in terms of first layer grid height, surface meshing partition scale, and prismatic coefficient. Through uncertainty analysis, correctness convergence are verified. Towing tests conducted compare experimental data with simulation results, which validated reliability under all working conditions. Results show that will affect simulated error 3.91% for resistance 4.21% trim, meeting requirements analysis accuracy. Based proposed approach, optimization design carried out improve ATV. Effects bow plate angle, stern flap install height studied. Latin hypercube used sampling design, Kriging applied establish approximate model. The cross-validation leave-one-out method. Particle swarm parameter optimization, optimized configuration verified approach. indicate combination shows excellent improvement vehicles. model only 0.292%, fully verifies its accuracy effectiveness. ATV best drag reduction 38.81% compared original