impulse ventilation

The ventilation of underground car parks is important to avoid health problems associated with the inhalation of combustion products released by car engines, in particular carbon monoxide CO (which is commonly used as the indicator of car park indoor air quality). In recent years, a new mechanical ventilation system has appeared, based on the use of axial ventilators (jet fans) suspended under the car park ceiling. In this paper the flow generated by jet fans and their effects on pollutants are studied.