摘要
利用数值求解化学非平衡Navier-Stokes方程的方法，对有自由来流情况下喷流介质为空气和钾元素混合物的超声速钝体喷流流场进行数值模拟，分析喷流总温对模型周围电子密度分布的影响和喷流对模型气动力分布的影响，探讨利用喷流达到飞行器等离子体隐身方法的可行性。研究结果表明：在喷流总温T0j=2000K-3000K和喷流介质钾元素的质量分数为0．02和0．05的情况下，在模型周围可形成峰值电子数密度Ne=10^11×10^14／cm^3的等离子体层，而且模型的阻力可降低35％。
In present paper, the chemical nonequilibrium Navier-Stokes equations were solved numerically for the flowfields around supersonic blunt body with the jet of the mixture of air and kalium. It is analyzed that the total temperature affects on the distribution of electren density, and the jet affects on the aerodynamic force of supersonic blunt body. The feasibility of the hidden method of the plasma jet is discussed for supersonic vehicles, the following research results were obtained for the supersonic blunt body, the plasma layer of peak electron number density Ne= 10^11 - 5 × 10^14/cm^3 can be formed under the condition of total temperature of the jet T0j = 2000-3000K and the mass fraction of 0.02 and 0.05 for kalium, and the drag force coefficient of 35% is decreased.
出处
《空气动力学学报》
EI
CSCD
北大核心
2006年第1期90-94,101,共6页
Acta Aerodynamica Sinica
关键词
喷流
化学非平衡
电子数密度
等离子体
jet-flow
chemical nonequilibrium
electron number density
plasma
