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本文给出钝头细长锥无粘、平衡和非平衡高超声速绕流流场的数值分析。对存在化学反应的空气,考虑了13种气体组分和22个化学反应,包括N_2、O_2和NO的振动松弛与离介过程之间的耦合反应。头部亚-跨声速区和后身高超声速区分别用直线法和有限差分法进行计算。在来流条件M_∞=20～26,Re_∞=(p_∞u_∞α)/μ_∞=1.5×10~3～5.5×10~6(α为头部半径)的参数范围内,给出了绕流流场和等离子体鞘层诸特性,如激波形状、电子密度和电子碰撞频率等。
In this paper, the numerical analysis of the viscous, balanced and non-equilibrium hypersonic flow field in a blunt, tapered, long cone is given. For air with chemical reaction, 13 kinds of gas components and 22 chemical reactions are considered, including the coupling reaction between the vibrational relaxation of N 2 O 2 and NO and the dissociation process. Head sub-transonic velocity region and post-sonic region were calculated using the straight line method and the finite difference method. In the parameter range of the flow conditions M_∞ = 20 to 26, Re_∞ = (p_∞u_∞α) /μ_∞=1.5×10~3~5.5×10~6 (where α is the head radius), given is Flow around the flow field and the plasma sheath characteristics, such as shock shape, electron density and electronic collision frequency.