Numerical simulation of unsteady flow problem during UUV recovery

UUV was effected by the unsteady hydrodynamic interaction from the recovery system during the process of UUV recovery, it would greatly influence the motion control and safe recovery of UUV. The finite volume method (FVM) and dynamic unstructured technology were used to simulate the unsteady flow field of UUV recovery. Some rules of hydrodynamic were achieved in different velocity, distance and angle of attack. A regression equation was put forward where each parameter was of practical physical significance. The results of simulation show that the UUV and recovery system will always repel each other, meanwhile, the biggest force of hydrodynamic interaction will augment as the reynolds number and angle of attack increase, by contraries, the range will diminish as the angle of attack increase.