Study on infrared signature of solid rocket motor afterburning exhaust plume

To study the infrared signature of afterburning exhaust plume of solid rocket motor, the coupling calculation model for infrared radiation transfer in the afterburning plume was built. The radiation source term was induced to energy equation, thus the plume flow field and radiation transfer was calculated in a coupling way. Finite rate chemistry reaction model was used to simulate the 10 species afterburning exhaust plume; finite volume method and discrete ordinates method was separately used to solve the plume flow field and the radiation transfer equation. The spectral radiation intensity from 1 m � to 15 m � and radiation intensity contour were obtained, and both of them accord well with the experimental data from reference. The results show that the radiation characteristics in the near plume field can be captured varying with the physical characteristics of flow field, which shows that the coupling solution can increase the calculation resolution of radiation transfer.