A double-layer plasma generator and its application

Abstract

The invention discloses a double-layer plasmatron and application thereof. The plasmatron comprises an internal ablation layer, the two ends of the internal ablation layer are connected with anode andcathode plugs respectively, the internal ablation layer is sleeved by an external ablation layer, a discharging gap is arranged between the external ablation layer and the internal ablation layer, and groove holes communicated with the discharging gap are arranged in the radial direction of the external ablation layer. According to the double-layer plasmatron and application thereof, the plasma ablation wall is large, the internal pressure of an ablation space is controllable, the generated plasma quantity is large, the plasmatron can be directly used for powder ignition, and the problems inuniformity, consistency and controllability in the plasma ignition propellant process can be solved.

Description

technical field [0001] The invention belongs to the field of plasma technology, and in particular relates to a double-layer plasma generator and its application, which can be directly used for the ignition of gunpowder. Background technique [0002] Plasma is an ionized gas-like substance composed of atoms deprived of some electrons and positive and negative ions produced by ionization of atomic groups. It is a macroscopically neutral ionized gas whose scale is larger than the Debye length. Its movement is mainly dominated by electromagnetic force and manifests significant collective behavior. Depending on the application object, the plasma generator is also different. Capillary discharge plasma generators are commonly used in electrothermal chemical guns to generate thermal plasma and ignite the propellant by plasma. The structure of the capillary discharge plasma makes the direction of the plasma more constrained, and more plasma-state substances can be generated by ablat...

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Problems solved by technology

[0003] (1) The plasma is ejected from the bottom, which is not conducive to the uniform ignition and combustion of the propellant;

[0004] (2) The nozzle pressure is difficult to control, and it cannot be adjusted accurately during the ignition process of the propellant;

[0005] (3) The ablation area of ​​the capillary wall is small, and the generation of gas cannot be effectively adjusted

[0006] Therefore, different ignition conditions are required under different propellants and charge conditions. In order to obtain ideal plasma ignition conditions, it cannot be achieved through existing technologies.

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