Downward directed vertical wall jet formed by slot inlet: impact of air velocity

Proposes a novel ventilation mode between mix and displacement ventilation, which is downward directed vertical wall jet from slot inlet. Using 2DPIV, studies the impact of jet air velocity on the airflow, and discusses the attached distance limit. It indicates that the higher of jet air velocity is, the longer of attached distance formed is, and the stronger of Coanda effect is. At the mean time, the higher of air velocity is, the stronger the power of entraining surrounding air of the jet is, and the wider surrounding effected area is. The impact of change of jet air velocity on the attached distance limit is not obvious.