建立了羽流流场的耦合计算模型,通过在流场能量方程中引入辐射源项,实现了流场计算与辐射传输的耦合求解.使用有限速率模型对羽流中后燃反应进行了模拟,使用离散坐标法求解羽流辐射传输方程,得到了羽流红外辐射出射度在1 000 ～4 500/cm波数范围内的分布情况及辐射出射度在近场内的分布云图,计算结果与试验数据符合较好.研究结果表明,不同工作压强、来流马赫数和飞行高度均会在一定程度上改变羽流流场结构和温度分布情况.%A coupling calculation model for infrared radiation transfer of plume is built. The radiation source term is induced into energy equation, thus the plume flow field and radiation transfer can be solved in couple. A finite rate model is used to simulate the afterburning phenomenon; a discrete coordinate method is used to solve the radiation transfer equation. The spectral radiation intensity from 1 000 cm"1 to 4 500 cm"1 and the radiation intensity contours are obtained. The calculation results concide well with the experiment data. It shows that the motor's operation pressure, the free stream's Mach number and flight height can change the flow structure and temperature distributions of the plume in a extent.
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