分煙用換気システムの開発

（実スケールにおける排煙効果）

抄録

We often perceive odors of smoking at seats for non-smokers of cafés and restaurants. A new ventilation system was developed by using the knowledge that neither flow separation nor backward flow could occur in case of increasing velocity distribution near walls by using 1/10 models⁽¹⁾⁽²⁾. In this paper, the effects of the system were examined by using an actual scale model, and it was confirmed that the system could remove smoke promptly, and that unsteady flow prevented smoke from staying in the wake of column. The conditions when residence time of smoke was the shortest were found as follows. The value of Strouhal number was about 0.3, and the ratio of flow time and period was about 0.5.