Simulation and Experimental Study on Muzzle Flow Field of Electromagnetic Energy Equipment

Abstract

AbstractIn order to study the characteristics of the muzzle flow field during the dynamic launch of electromagnetic energy equipment, based on Navier-Stokes equation and Realizable \(k - \varepsilon\) turbulence model, in this paper, a two-dimensional unsteady compressible turbulence model of electromagnetic energy equipment is established by using overset mesh method and UDF secondary development. A high-frequency dynamic pressure transmitter was used to measure the pressure change of the shock wave after the armature was discharged. The simulation results show that the muzzle flow field is a complex shock wave system flow field in the process of electromagnetic energy equipment dynamic launching, and presents different parameter changes at different times, forming the shock wave in front of the armature, spherical shock wave with moving center in the muzzle and the coronal shock wave successively. The experimental results show that when the armature initial velocity ranges from 420 m/s to 450 m/s, the shock pressure varies from 52 kPa to 58 kPa (170 mm in the transverse direction and 80 mm in the longitudinal direction from the muzzle Center), and the rising edge is steep and the falling edge is slow.KeywordsElectromagnetic energy equipmentMuzzle flow fieldOverset mesh methodPressure transmitterShock wave