J0101-2-3 Visualization of Bead-like Vortex flow around a Rotating disk in a Cylindrical Casing

Abstract

Flow around a rotating disk in a cylindrical casing is numerically and experimentally investigated. While the disk is thick and the axial gap is narrow, the radial gap between the disk rim and the shroud of the casing is large. In this case, Taylor-Couette vortex like flow appears in the radial clearance. When the rotating speed is moderate, the vortex flow is wavy and has some disturbances. The thinness of the axial gap prohibits the penetration of the disturbances into the inner region. Instead, a bead-like flow and a sickle-like vortex flow appear.