In order to reflect the effect of viscousness and vortex on added mass of submerged vehicles,especially these with complex shape in low Reynolds flow and strong vortex,the measurement on added mass of vehicles with sphere,ellipsoid and complex shapes was carried out by numerical simulation and model test.Programs in numerical simulation include viscous and non-viscous fluent CFD solvers and potential Hess-Smith procedure.After simulation a series of experiments was carried out in towing tank.By comparing the results from simulation and experiments,it is found that for simple shape bodies,the viscousness and vortex have little effects on added mass,and each numerical simulation program does the work even based on potential flow.While for vehicles with complex shape,their effects are large and up to 9%,only viscous solver results are relative to model test results.These conclusions are useful in hydrodynamic design of submerged vehicles.