Assessment of thermodynamic parameters of plasma shock wave

International Congress on Energy Fluxes and Radiation Effects

Vasileva, O.V.^1 ; Isaev, Yu N.^1 ; Budko, A.A.^1 ; Filkov, A.I.^2

National Research Tomsk Polytechnic University, 30 Lenina avenue, Tomsk

634050, Russia^1

National Research Tomsk State University, 36 Lenina avenue, Tomsk

634050, Russia^2

关键词: Artificial viscosity;    Gas dynamic parameters;    High frequency fluctuations;    Modified algorithms;    One-dimensional equation;    Optimum parameters;    Regularization parameters;    Thermodynamic parameter;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/552/1/012026/pdf
DOI  :  10.1088/1742-6596/552/1/012026

来源: IOP

【 摘 要 】

The work is devoted to the solution of the one-dimensional equation of hydraulic gas dynamics for the coaxial magneto plasma accelerator by means of Lax-Wendroff modified algorithm with optimum choice of the regularization parameter artificial viscosity. Replacement of the differential equations containing private derivatives is made by finite difference method. Optimum parameter of regularization artificial viscosity is added using the exact known decision of Soda problem. The developed algorithm of thermodynamic parameter calculation in a braking point is proved. Thermodynamic parameters of a shock wave in front of the plasma piston of the coaxial magneto plasma accelerator are calculated on the basis of the offered algorithm. Unstable high-frequency fluctuations are smoothed using modeling and that allows narrowing the ambiguity area. Results of calculation of gas dynamic parameters in a point of braking coincide with literary data. The chart 3 shows the dynamics of change of speed and thermodynamic parameters of a shock wave such as pressure, density and temperature just before the plasma piston.