某喷气发动机尾焰的中长波红外辐射分析和比较  

Analysis and Comparison of Middle and Long Wave Infrared Radiant Intensity of Jet Engine Exhaust Plume

作　　者：王东 白冰 张雷 李武周 纪磊 

机构地区：[1]中国洛阳电子装备试验中心,河南洛阳471003

出　　处：《红外》2017年第1期18-22,共5页Infrared

摘　　要：利用中波红外和长波红外热像仪对某型喷气飞机发动机尾焰的红外辐射特性进行了测量,得到了3~5μm和8~12μm波段的尾焰辐射亮度分布。结果表明,从飞机尾向上观测到的中波红外和长波红外尾焰均成对称分布,前者的最高辐射亮度和尾焰面积分别是后者的4.6倍和2.1倍;从飞机侧向上观测到的中波红外尾焰的最高辐射亮度、尾焰长度和面积分别是长波红外尾焰的2.2倍、3.8倍和5.7倍,前者的优势非常明显。另外,受高温尾焰加热的影响,尾焰周围空气的温度明显上升,使其辐射亮度高于其他背景的辐射亮度。本文获得的测量结果对尾焰红外辐射特性仿真和计算研究具有一定的参考价值。The infrared radiation characteristics of exhaust plume from a certain type of jet engine were measured by using mid-wave and long wave infrared thermal imagers.The radiation intensity of the exhaust plume in mid-wave and long wave bands was obtained.The result showed that both mid-wave and long wave exhaust plume observed from aircraft tail exhibited symmetrical distribution.The greatest radiation intensity and area of the former were 4.6 and 2.1 times as those of the latter respectively.The greatest radiation intensity,plume length and area of mid-wave infrared plume observed from the side of aircraft were 2.2,3.8 and 5.7 times as those of long wave infrared plume respectively.The advantages of the former were more obvious.In addition,because of the influence of high temperature heating of plume,the temperature of the air around plume rises significantly.Its radiation intensity was higher than that of other background.The measurement results obtained were of referential value to the simulation and calculation of infrared radiation characteristics of aircraft plume.

关 键 词：发动机 尾焰 红外辐射 辐射亮度 热像仪 

分 类 号：V231[航空宇航科学与技术—航空宇航推进理论与工程] TN21[电子电信—物理电子学]