Supervisor:
Southwest Ordnance Industry Bureau
Organizer:
Chongqing Ordnance Industry Society
Chongqing University of Technology
Chongqing University of Technology
Simulation of plasma sheath formation characteristics of hypersonic vehicle
| DOI: | 10.11809/bqzbgcxb2023.12.024 |
| Keywords: | hypersonic vehicle; plasma sheath; thermochemical nonequilibrium; flow fields simulation; wedge shape |
| Abstract: | When hypersonic vehicle is flying, a large amount of plasma is generated around the vehicle due to high temperature ionization caused by shock wave compression, which may form plasma sheath, thus affecting the detection and tracking of the vehicle. The formation of plasma sheath is related to the shape, flight altitude and speed of the aircraft. Two dimensional geometric models are established for the blunt cone and wedge aircraft respectively, and the Two Temperature Model and Gupta chemical reaction model are used to simulate and analyze the thermochemical non equilibrium flow field around the aircraft at their typical flight altitude and speed. The blunt cone is surrounded by plasma sheath with an electron count density up to 10 14 /cm3.For the wedge shape vehicle, the distribution of air temperature, density, and chemical composition in the head area under six difference flight conditions are obtained by simulation. The results show that the flight altitude and flight speed have different degrees of influence on the physical characteristics of the flow field. The wedge shaped hypersonic vehicle has a small ionization region and a low ionization degree, and it does not tend to form plasma sheath around the vehicle. |
| Issue: | Vol. 44 No. 12 (2023) |
| Published: | 2023-12-28 |