Scale model study of airflow performance in a ceiling slot-ventilated enclosure: isothermal condition

The purpose of this study was to investigate experimentally airflow performance of wall-jet in ceiling slot-ventilated enclosure under an isothermal condition. Airspeed field measurement associated with airflow trajectory visualization was conducted in a scale model. Centerline velocity decay, airspeed profiles, jet penetration on the ceiling, jet impingement on the floor, airflow pattern, and airspeed of occupied zone were analyzed via experimental data and compared with literature theoretical expressions. Semi-empirical equations were derived to describe the wall-jet performance. The study of airflow characteristics is helpful to predict an isothermal wall-jet performance occurred in a ceiling slot-ventilated enclosure. The results provide the design guidelines of ventilation system for regulating and controlling the indoor environment.