The infrared radiation in 3~5�yμm band of the unforced plume and the forced plume which is mixed by injecting micro-jets into subsonic shear layer were calculated by a three-dimensional infrared(IR) radiation code of the plume, it was developed by the finite volume method (FVM) in non-gray absorbing-emitting media. The 3-D flow field of the jet was simulated numerically by FVM, Tam-Thies turbulence model. The results show that small injection flow rates (less than 3%) can make sharp increases in both velocity and temperature decay rates at middle Mach number. Compared with the unforced plume, when the jet mass flow accounts for 1% of the main flow, the IR radiation intensity of the forced plume is reduced by about 15%; and when the jet mass flow occupy 3%,the IR radiation intensity of the forced plume is decreased by about 27%.
Li Jiajun,Eriqitai.Mixing enhancement in round jet exhaust using pulsed blowing:3-D numerical simulations [J].Journal of Beijing University of Aeronautics and Astronautics,2007,33(7):773-776(in Chinese)