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通过对喷气式飞机尾焰流场特点的深入分析,绘制了尾焰的等温线图和各组分等压图。考虑了谱线的碰撞展宽效应和多普勒展宽效应,利用单谱带模型C-G近似法,计算了尾焰各控制体的吸收系效,同时给出了尾焰红外辐射强度的计算方法和步骤。最后,计算了某单管型号的喷气式飞机在非加力状态下的3μm～5μm红外辐射强度,并与实际的测量数据进行了比较,分析表明该结果与实际测量数据具有较好的一致性。
By analyzing the characteristics of the jet flame field, the isotherm diagrams and the isobaric diagrams of the tail flame were drawn. Taking into account the collision broadening effect and Doppler broadening effect of the spectral lines, the absorption coefficient effect of each control body of the tail flame is calculated by using the single-band model CG approximation method. At the same time, the calculation method and the steps of the tail flame infrared radiation intensity are given . Finally, the infrared radiation intensity of a single-tube jet aircraft at 3μm ~ 5μm under non-energized condition is calculated and compared with the actual measurement data, and the analysis shows that the result is in good agreement with the actual measured data .