励起された長方形噴流の拡散促進機構に関する研究
1997 年 63 巻 605 号 p. 101-105
詳細
1997 年 63 巻 605 号 p. 101-105
The diffusion mechanism of an excited rectangular jet was investigated by comparing the measured velocity profiles and the suggested vortical structures. Experiments were carried out using an air jet from a sharp-edged rectangular orifice of aspect ratio 4. The jet was excited in the interaction mode, in which the stable interaction of vortices occurred. The results reveal that the jet diffusion mechanism is closely related to the vortical structures in the rectangular jet : jet width in the major axis plane decreases due to inward flow induced by vortices bending downstream, and that in the minor axis plane increases significantly due to outward flow induced by stretched vortices and split small vortex rings.
