Abstract
The characteristics of the plasma generated by hypervelocity impact have been studied by theoretical analysis and numerical simulation. Based on the theory of thermodynamics and statistical physics, a model of thermal ionization is proposed to describe the relationship between the degree of ionization and temperature. Plasma conductivity related to temperature is obtained by considering the velocity distribution law at heat balance. Three-dimensional model of an aluminum plate impacted by a spherical projectile with 6.0 km/s at an angle of 60° is established, and the corresponding simulation is performed. Then the parameters of the physical model are obtained, and the characteristics of plasma generated by hypervelocity impact are analyzed. There is a good agreement between the model predictions and the experiment results, which indicates that the model is effective and reasonable for analyzing the characteristics of plasma.
| Original language | English |
|---|---|
| Pages (from-to) | 542-548 |
| Number of pages | 7 |
| Journal | Gaoya Wuli Xuebao/Chinese Journal of High Pressure Physics |
| Volume | 27 |
| Issue number | 4 |
| Publication status | Published - 2013 |
Keywords
- Hypervelocity impact
- Numerical simulation
- Plasma
- Smoothed particle hydrodynamics
- Thermodynamic equilibrium ionization