Numerical Simulation On Hydrodynamic Characteristics Of Ventilating Submaring-launched Vehicle In The Vertical Launch Process

As a kind of underwater weapon, submarine-launched missile has greatadvantage in concealment, flexiblibity and attack ability. Although the lanch processunderwater is short, it is the initial conditions of the air flight, directly affectsstability and the accuracy of the missile. It is necessery to deeply reseach thehydrodynamic mechanism of thet submarine missile in the vertical launch process.In this paper, the underwater movement and water-exit course of the ventilesubmarine missile are simulated with Fluent. The6-dof solver and dynamic meshmethod are applied to compute the boundary changes of the flow field in thesubmarine-launched missile launch process.The numerical simulation was carried out to study on the submarine missilelaunch process with2D axisymmetric solver, and the influence laws of the initialpressure of the tube, ventilation mass flow, one ventilation circle and doubleventilation circle was analyzed, the cavitation shape, the surface pressure, drag forcechanging with different ventilation parameters was obtained.The numerical simulation was carried out to study on the submarine missileunderwater movement and water-exit process with3D solver, and the hydrodynamiccharacteristics and trajectory of missile in the conditions of crossflow, ventilationand no ventilation, and different ventilation mass flow were obtained.