用带有非平衡化学反应源项的粘性激波层方程模拟了高超声速小钝头体零攻角再入段绕流流场,并对壁温边界条件进行了改进.建立了复杂几何形状内求解辐射传递方程的贴体坐标系下的离散坐标法,与谱带模型相结合求解了小钝头体头身部七组元空气激波层辐射强度场.考查了紫外光谱区(0.2～0.4μm)、可见光谱区(0.4～0.8μm)及红外光谱区(0.8～2.0μm)吸收系数不确定性对辐射场计算结果的影响.

The flow field over hypersonic small blunt bodies at zero incidence were numerically simulated by VSL equations with the nonequilibrium chemical source terms. The boundary condition of the wall temperature was improved. The discrete coordinate method to solve radiation transfer equation under body fitted coordinate system was established. And the 7 species air shock layer radiation field of small blunt head body in reentry was simulated by this method combined with band model. The influence of absorption coefficient error on the computational result of head body radiation field was investigated in the ultraviolet region(0.2～0.4μm), visible region(0.4～0.8μm)and infrared region(0.8～2.0μm).