抄録
When we input momentum to the circular jet by the mini jet that is about 1/100 size and set on edge of the circular jet the cross section of the circular jet is deformed to elliptically. And diffusion of the circular jet is prompted. In this case suitable position of the mini jet is considered. Around the position initial mechanism of vortex ring is seen. Momentum or materials input into the circular jet due to the mini jet are took in the circular jet and mixed immediately. Operation of the mini jet prompts the diffusion of the circular jet and mixes the materials introducing by the mini jet with the circular jet. And this shows possibility the control of products in combustion gas etc.
