液中同軸円形噴流の混合・拡散に関する実験的研究

抄録

Mixing and diffusion phenomena between the jet and the surrounding fluid are very important in connection with improving the combustion efficiency of liquid fuels and promoting various chemical reactions. In this study, we focus on the coaxial circular jet, which is the basic flow of the air-fuel mixture system in a combustor. The coaxial circular jet consists of an inner circular jet and an outer annular jet, and it is believed that the diffusion and mixing of the jets can be actively promoted, controlled, and optimized by changing their velocity ratios. In this study, we measured the concentration field near the exit of a coaxial double-circular nozzle in liquid using an absorbance-based concentration measurement system in order to optimize the mixing and diffusion of the coaxial circular jet. Correlations between the circular and annular jets and the ambient fluid were also calculated.