Numerical simulation of two-phase flow and interior ballistic for missile launching system

An interior ballistic numerical procedure has been developed to solve the two-phase flow in cooler and launching canister of missile launching system. The gas-liquid two-phase flow is described using an Euler-Lagrange method. The density, velocity, pressure and temperature profiles of gas phase turbulent flow filed, liquid droplets tracking and droplets velocity, temperature and diameter variation during evaporation process, two phase interaction and interior ballistic performance are obtained. The interior ballistic performance is affected by the spray conditions such as the water injecting pressure, diameter and number of jet orifices and water-gas mass ratio. Several applications are calculated to analyze the influence of spray conditions in case of the gas and geometrical properties are determinate. The results show that the smaller droplet evaporates quickly; the evaporation is faster by improving the effect of atomization. The interior ballistic performance is better by using gas-steam missile launching system. The conclusions are useful to design and optimize the missile launching system and improve the reliability.