<正> In the Interdisciplinary Shock Wave Reach Center, Institute of Fluid Science, To hoku University, a series of experiments has been conducted aiming to investigate the shock vortex interactions. For the study of vortex ring or loop a special double diaphragm shock tube was designed. Different types of orifices can be attached to the end of this shock tube. In this study, we focus on the vortex ring propagation with different orifices, whose opening diameters and shape are different. In order to observe the vortex ring schlieren method was used. It is found that different shapes or orifices effect the tune between the moment when jet captures the vortex and the moment when the vortex completely breaks down. When star shape orifice is used, vortex loop becomes big around its tips and insignificant difference of propagation velocity of the vortex loop between the blunt orifice and the star orifice is observed.
To explore the background and basis of the node document
Documents that have the similar content to the node document