同軸円形噴流の混合・拡散の制御に関する数値計算

抄録

This paper describes the results of numerical studies on the mixing and diffusion control of coaxial jets.The effect of the exit area ratio between the inner round nozzle and the outer annular nozzle on characteristics of jet was studied. Numerical calculations were carried out using Large Eddy Simulation (LES). Changing the exit area ratio between the inner round nozzle and the outer annular nozzle from 1.5 to 1, it was found that the effect of the outer annular jet on the inner round jet decreased, resulting in a reduction of mixing. An increase in the exit area of the inner round nozzle and a decrease in the exit area of the outer annular nozzle resulted in the central axis of flow velocity along the central axis and a reduction in the jets spread.