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Outline
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.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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