Development of Ventilation System for Nonsmokers Used in Hall without Partition

(Ventilation Effect of L-shaped Room)

Abstract

The ventilation effect in the L-shaped structure room was examined by experiment and CFD calculation. It was found that a flow separation occurred at the corner by using steady flow or unsteady flow. The amount of smoke staying in the room could be halved compared to the steady flow by using the unsteady flow. On the other hand, in the case of the unsteady flow, it was found that smoke was expanded in a wide range. So it was necessary to suppress the flow separation at the corner. It was found effective to set a rotating cylinder with a peripheral speed equal to the flow at the corner.