Vortex Sheding의 과정

Vortex Sheding의 과정

 

1. Surface Vortex

 

- Level 1~2: In the evolution process of the surface vortex, with the increase of the turbulence, the surface swirl becomes the surface dimple.

- Level 3~4: Dyeing vortex and vortex pulling floating trash without air occurs gradually in the intake with increasing intensity of swirl and intake pipe suction.

- Level 5: The vortex pulling air bubble group forms when the surface fluctuates violently, and the bubble group is rotating with a certain vertical/horizontal circumference.

 

 

2. Sub-Surface Vortex

 

- Level 1~3: The sub-surface swirl flow develops into the dye vortex, with the coupling of the swirl flow near the walls and the suction of the intake pipe.

- Level 4: If the water contains air, the air bubbles group, and serial air bubbles are formed and sucked into the intake pipe gradually.

- Level 5: Due to the great suction, the air core is formed and pumped into the intake pipe.

 

[Surface & Sub-Surface Vortex 과정]

 

 

Below figure shows a graphical representation of the vortex level, and CFD(Computational Fluid Dynamics) analysis results shall be carefully reviewed based on common understanding of Vortex activity.

 

[CFD Analysis for Cooling Water Sump 예시]