Disc structure for inducing and separating vortex ring

The invention discloses a disc structure for inducing and separating vortex rings, the disc structure is a permeable porous medium disc (3), the permeable porous medium disc (3) is a solid disc with pores, the porosity of the permeable porous medium disc (3) is gradually increased along the radius direction, and the porosity is gradually increased from 0 to 0.92 along the radius direction. The radius D of the permeable porous medium disc (3) is 14.8 mm, the thickness e of the permeable porous medium disc (3) is 32.4 microns, the permeable porous medium disc (3) takes the center as the circle center, and the porosity of the part with the diameter within the range of 740 microns is 0. The disc structure for inducing the separation vortex ring is innovatively provided, a typical separation vortex ring structure in the passive flight process of dandelion seeds can be formed, and the wake length and lift force of disc streaming can be remarkably improved under the condition that the disc size and quality condition