Recoilless Gun Simulation Of Two-phase Flow Dynamics Model

The characteristics of the internal flow field of the rearless cannon directly affect the initial motion law of the projectile and others,which have an important impact on the realization of the tactical index without the rear cannon.The use characteristics of the gun play a vital role.This article did research on the internal ballistic process of the rearless cannon,through the experimental research,theoretical analysis and numerical simulation.The main research work is as follows:(1)This article has designed a test program for the 82 mm the rearless cannon system.Under certain conditions of launch and charge,the characteristic parameters such as the initial velocity of the projectile and the pressure change of the pressure point in the bore are obtained.Provide reference and comparison for subsequent theoretical research.(2)According to the characteristics of the flow field with recoilless guns,this paper established a mathematical model of the classical trajectory,and fourth-order Runge-Kutta method was used to prepare the accuracy of the simulation program.The physical quantity of internal ballistics is obtained by calculation,and the accuracy of the simulation results is analyzed with the test results.(3)This paper establishes a one-dimensional two-phase flow dynamics model,and uses the two-step component CTVD difference format to program the model.Through comparison,the accuracy of the simulation results is verified.The characteristics of the flow field are analyzed in two periods.(4)An axisymmetric two-dimensional two-phase flow model was established and programmed for simulation calculation.The variation law of characteristic physical quantity in the process of internal ballistics is obtained.It is found that the radial effect is obvious in the development stage of the flow field,and the radial effect gradually disappears with the development of the flow field.