Abstract:
Traditional methods for smoke control in underground car parks are based on the undisturbed thermal
stratification of smoke and its exhaust to the outside. Usually walls and smoke barriers are used to avoid the
flow of the smoke to other spaces. Impulse ventilation systems (IVS) are currently applied to the smoke
control in underground car parks and it is able to avoid the smoke spread.
This paper will present the principles for the use of IVS for smoke control in underground car parks
illustrated with the results of CFD simulations. The paper will detail the physical processes of smoke
entrainment by impulse fan jet, interaction of impulse fan jet with smoke ceiling jet, the necessary distance
between impulse fans and the required exhaust flow rate from these compartments.