Simulation of atmospheric pressure dc glow discharge along helium flow in nitrogen coupled with gasdynamic effect

摘要

We carried out two-dimensional numerical simulation of atmospheric pressure dc glow discharge between nozzle and plate electrodes. Since helium is injected from the nozzle into atmospheric pressure nitrogen, the discharge is generated along the helium flow. Therefore, gas flow simulation and gas discharge simulation were carried out. We found that the discharge is generated in the region with helium mole fraction larger than 99 %. In gas flow simulation considering the volume force and heat source from plasma, the results suggested that the maximum gas temperature in the positive column exceeded 1600 K and the strong ion wind was generated.