Three-dimensional Investigations of Vortex Shedding Suppression of A Near-Plane Circular Cylinder in Oblique Flow

C. X. Wang, F. Feng, Y. Liu,

“Three-dimensional Investigations of Vortex Shedding Suppression of A Near-Plane Circular Cylinder in Oblique Flow”, Journal of Mechanical Engineering Research and Developments, 

ABSTRACT:  In this research, a discussion of results is presented for the dimensionless analysis of generating irreversibility of vessels in which mixing and heating of fluid are done simultaneously. In the first case, the impeller inside the mixing vessel is the heating body, and in the second case heating body is a fixed ring and the impeller inside the vessel. A numerical investigation of flow with various angles past a circular cylinder close to plane boundary has been carried out. Flow equations such as Navier-Stokes equations have been solved using finite volume method. The effects of flow angles on the vortex shedding suppression were investigated with three-dimensional simulation at Reynolds number of 8*105. The angles of incoming flow ranging from 00 to 300 with an increment of 150, each angle was calculated at gap ratios of 0.2, 0.15, 0.1, 0.05.The effects of flow angle on vortex suppression were studied, it was found that the effect of angle increases at the critical gap ratio, the vortex shedding is minimized in the oblique flow with angle of 30 degree.

Keywords: Vortex shedding; Suppression; Circular cylinder; Flow angle; Numerical simulation.