航空发动机

李一涵1 ，胡海洋 1 ，王强1 ，谢业平 2 ，邓洪伟 2.兼容探测器效应的燃气红外特性计算宽带模型[J].航空发动机,2025,51(6):52-58

兼容探测器效应的燃气红外特性计算宽带模型

Wide-Band Model for Infrared Signature Calculation of Combustion Gas Compatible with Detector Effects

DOI：

英文关键词:gas radiation infrared detector wide-band model k-distribution model virtual aerosol infrared signals

基金项目:国家级研究项目资助

作者	单位
李一涵1 ，胡海洋 1 ，王强1 ，谢业平 2 ，邓洪伟 2	1.北京航空航天大学能源与动力工程学院，北京 100191；2.中国航发沈阳发动机研究所，沈阳 110015

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中文摘要:

多尺度多线组宽带k分布（MSMGWB）模型能够精确而高效地求解红外辐射在强非均匀气体中的远程传输。为实现其对红外探测器光谱响应特性的兼容，引入等效光谱吸收率量化探测器保护窗口及CCD本身光电响应特性随入射波长的变化，并将其等效为环境空气中的虚拟气溶胶。结果表明：该算法能够与现有的MSMGWB模型兼容，结合其模型参数优化算法可获得良好的计算精度。碳氢燃料飞行器排气系统及其燃气喷流的远距离红外成像计算结果显示，在考虑和不考虑气溶胶影响的情况下，优化后的MSMGWB模型对红外探测器有效接收到的来自20/100 km外航空发动机排气系统的3~5 μm波段红外信号的最大相对计算误差小于9%，计算量仅为常用的统计窄带模型的1/4。

英文摘要:

The multi-scale multi-group wide-band k-distribution model (MSMGWB) enables accurate and efficient solutions for long-distance transmission of infrared radiation in strong non-uniform media. In order to achieve its compatibility with the spectral response characteristics of infrared detectors, the equivalent spectral absorptivity was introduced to quantify the variations of the photoelectric response characteristics of the detector protection window and the CCD itself with the incident wavelength, and it is equivalently treated as virtual aerosols in ambient air. The results show that the algorithm is compatible with the existing MSMGWB model, and good accuracy can be achieved by combining it with the model parameter optimization algorithm. Calculations of long-distance infrared imaging results of the exhaust system and exhaust jets of aircrafts fueled by hydrocarbons show that, with and without considering the influence of aerosols, the maximum relative errors of the optimized MSMGWB model for the 3 to 5um band infrared signals effectively received by the infrared detector from aeroengine exhaust systems at 20/100 km is less than 9%, and the computational load is only one- fourth (1/4) of that of the commonly used statistical narrow-band model.

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