Determination of effort in an energy-efficient system of electromagnetic charge holding

The article considers the conduct of a numerical experiment to determine the forces in the system of electromagnetic retention of the propellant charge of a gas detonation launcher based on the calculation of the magnetic field by the finite element method in a three-dimensional formulation of the problem. In order to introduce the technology of launching a propellant charge using a gas detonation launcher into domestic production, a study was conducted and a control system was developed, an element of which is an electromagnetic charge retention device. The main parameters used to control the launch energy are the initial pressure and the volume of the compressed gas charge. The value of these parameters depends on the conditions of injection of the gas charge into the device, which affects its further characteristics during the initiation of ignition. A study was conducted to determine the influence of the conditions of injection of the gas charge on its state before the moment of ignition. In particular, the influence of the injection pressure on the parameters of the gas charge at the moment of valve actuation was analyzed. The results of the research showed that the injection pressure has a significant effect on the final pressure of the gas charge during the full operation of the valve, which is an important factor for precise control of the flight range. A numerical experiment was conducted in which the current in the winding varies from 0 A to 12 A. According to the results of the calculations, the distribution of the magnetic field in the form of magnetic induction in the calculated region was obtained. The distributions of induction at different values of the current have a similar appearance, however, the induction increases with increasing current, which is due to the increase in the field strength with an increase in the total current. It was determined that the largest value of induction from 2.2 T. to 2.7 T. is located in the heel of the propelling charge, this is due to the fact that the cross-sectional area in the direction of the total magnetic flux is smaller than in the magnet body and the cup. According to the results of the numerical experiment, it was determined that the force of holding the projectile charge of 1000 N is achieved at a coil current of 2.41 A.