Numerical Simulation Research On The Sharing Submaring-launched Vehicle Influenced By Different Launching Space And Crossflow

With the development of the technology and its application in weaponry, the demand for the integrated combat and defense capability of the submarine is becoming higher and higher. On the basis of the vertical submarine-launch technology, the continuous launch of the submarine-launch vehicle will be a tendency of the development of weapons. In this paper, three-dimensional numerical simulation is used to research the problem of the continuous launch of the submarine-launch vehicle, mainly focus on the flow field characteristics, the hydrodynamic characteristics and the vehicle motion characteristics influenced by different launching space and crossflow, analysing the "water hammer" effect after the missile launched out of the tube. The main topics of this thesis are as follows:Based on average multiphase flow model, the three-dimensional numerical simulation modeling of the continuous launch of the submarine-launch vehicle is established. The numerical simulation of the continuous vertical launch underwater is completed to analyse the flow field characteristics, the hydrodynamic characteristics and the vehicle motion characteristics of both missiles.The numerical simulation of the submarine-launch vehicle under different launching space is completed to analyse the flow field characteristics, the hydrodynamic characteristics and the vehicle motion characteristics, mainly focus on the pitch motion of the second vehicle influenced by the first vehicle. Crossflow is also considered to analyse the flow field characteristics, the hydrodynamic characteristics and the vehicle motion characteristics.The "water hammer" effect after the missile launched out of the tube is researched and the pressure variation in and around the launch tube are obtained, analysing the relationship between mass flow rate in the launch tube and the pressure down the launch tube.