Calculation and experimental study on the resistance of naval ships coated with an anti-shock layer

A new concept product——Anti-Shock Layer(ASL)——was developed to isolate the underwater non-contact explosion loads and ship radiated noise.Ship resistance was taken into account while a naval ship was coated with ASL.Numerical simulation of three-dimensional viscous flow fields over the ship model was processed by solving Reynolds-Averaged Navier-Stokes(RANS) equations with an RNG turbulence model and the finite volume method.A type of time domain boundary element method based on Green's theorem was used to compute the wave making resistance of the ship model.At the same time,a resistance contrast test between ship models coated with and without ASL was carried out at the towing tank.The numerical test results show that the ship resistance is almost the same at low speed and increases less than 1% at high speed as a result of wave making resistance when a ship is coated with ASL.The comparison between numerical and experimental data shows that the demonstrated numerical method is feasible and reliable.