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发动机排气系统是飞机红外辐射的重要辐射源。通过将排气系统的流场计算模型、气体的红外辐射指数宽谱带模型(EWBM)和辐射传输方程(RTE)结合起来,发展了一种发动机排气系统红外辐射特性估算方法,并开发了相关程序。通过算例将计算结果与试验测量结果进行比较,验证了该方法在排气系统红外辐射特性数值计算与分析方面的可行性和有效性。
Engine exhaust system is an important radiation source of aircraft infrared radiation. By combining the flow field calculation model of the exhaust system, the EWBM (Gas Emissivity Index Broadband Model), and the Radiative Transfer Equation (RTE), a method to estimate the infrared radiation characteristics of the engine exhaust system has been developed. Related procedures. The results of calculation and experimental measurements are compared by examples to verify the feasibility and effectiveness of this method in the numerical calculation and analysis of infrared radiation characteristics of exhaust system.