The effective infrared radiation intensity (self-radiation intensity and reflected radiation intensity)

gas radiation intensity and total radiation intensity of afterburning turbofan engine under non-afterburning condition were calculated and analyzed using reverse Monte-Carlo method.The distributions of them were discussed and analyzed.The results show that

under the conditions given hereto

the cone is the strongest infrared radiation source

which contributes more than 65% to the maximum infrared radiation intensity;the turbine blade and radial flame holder are the second ones when the detective angle is less then 20°;the divergent part of nozzle plays an important role to the spatial distribution of infrared radiation towards the aft-hemisphere

especially in the region with detective angle bigger than 20°;the reflected radiation intensity of cone

turbine blade and radial are less than 10% of the self-radiation intensity.