Measurement and analysis of infrared radiation characteristics of jet airplane nozzle and flame
The infrared radiation characteristics of a jet airplane in side-flying state are measured by a 3～5 μm medi-um-wave and 8～12 μm long-wave thermal imager,and the infrared radiation luminance distribution of the jet nozzle and tail flame is obtained.The results show that the mid-wave and long-wave radiation of the tail flame in this state presents a symmetrical envelope distribution,and with the increase of distance,the jet beam of the tail flame gradually diffuses,and the radiation brightness gradually decreases.Under the same circumstances,for the same case,the medi-um-wave band tail flame is about 3.5 times longer and 6.3 times larger than the long-wave one.The tail nozzle is the brightest part of the aircraft's radiation,with contrast ratios of 20.1 in the medium-wave radiation and 8.2 in the long-wave radiation.
NETL
NSTL
万方数据
