Numerical Simulation Of Liquid Traveling Charge Of Spray Atomization And Combustion

Increasing the artillery projectile velocity is been one of the focus that experts research. As the superiority used in structure compatible of artillery, the traveling charge techniques have always been highly valued by scholars. The main charge is solid propellant and the use of outer ring liquid propellant traveling charge injection atomization are modeled and numerical simulated in this paper and the result is meaningful to traveling charge techniques.The theoretically mechanical model of liquid traveling charge of outer ring jet atomization is designed on the basis of the feature of interior ballistic process of the liquid traveling charge and regenerative liquid propellant gun. Zero dimensional internal ballistic model of liquid spray atomization and combustion of traveling charge consists of jet model which is based from Unsteady Bernoulli Equation, coupled motion between piston and liquid propellant jet, classical lump interior ballistic model. Doing the numerical simulation by four-order Runge Kutta method to the model and the variation rule of the physical parameters in bore is received. At the same time different kinds of traveling charge dose, nozzle cross section area and delay time are numerically simulated. What's more the numerical simulation results are analyzed theoretically.The interior ballistic model of one-dimensional two-phase flow for liquid traveling charge is been established according to the interior ballistic theory following with the theory of one-dimensional two-phase flow and computational fluid mechanics. The distribution probability model of droplet size for atomized liquid propellant constitutes of the new jet model and the atomization model. The new jet model established which based on the control volume momentum conservation equation following with considering the coupled motion between the piston motion and liquid propellant jet. The atomization model is on the basis of the maximum entropy theory. The theoretical model is simulated numerically using the McCormack predictor-corrector scheme. Then, gain the distributive laws of the physical parameters in bore after the numerical simulation of the theoretical model. At last, analyze the numerical simulation results which can provide a theoretical basis for the design and practical application of the liquid traveling charge jet of atomization combustion techniques.