Hybrid Simulation Of Interaction Between Plasma Induced By Electron Beam And Airflow

As one of the many application fields of plasma technology,the active control technology of gas flow based on plasma has been paid more and more attention because of its advantages such as changing the state of the object under force,broadening the stable working range,no moving parts,short response time,and the great improvement of aerodynamic characteristics of the aircraft or engine.Compared with other plasma generation methods,the electron beam plasma generation method has certain advantages,but it also has some disadvantages such as expensive experimental equipment and high requirements for experimental conditions.In this context,the electron-beam excited plasma and its interaction with airflow are studied by numerical simulation.In this paper,the interaction between plasma and airflow was studied by simulating the multi-component plasma coupled with the multi-stage numerical model under the pure nitrogen environment of 20 kPa pressure and 300 K temperature with the electron beam of 0.1 A current value and 200 keV initial energy.Among them,the part of multi-component plasma is used to simulate the spatio-temporal evolution behavior of plasma generated by electron beam,and the hydrodynamics part is used to simulate the characteristics of airflow in nitrogen medium,and the interaction between them is simulated by means of parameter coupling.For the multi-component plasma model,continuity equation,momentum equation and maxwell equation are used to construct the model.For the simulation of plasma,the EGS4 software based on Monte Carlo method was used to simulate the spatial distribution of this high-energy electron beam,and then the spatial distribution of the plasma was obtained by importing the COMSOL Multiphsics software through collision ionization after processing.In terms of the effect of airflow on plasma,the simulation shows that nitrogen gas has an effect on the density,potential and field strength distribution of plasma at different gas flow rates,and the greater the gas flow rate is,the more obvious the effect will be.In terms of the effect of ion on airflow,the simulation found that plasma also had an effect on the flow and spatial pressure distribution of nitrogen gas at different gas flow rates,and the greater the gas flow rate is,the more obvious the effect will be.Therefore,it can be considered that plasma and airflow have a strong interaction effect.