ABSTRACT
This paper discusses a preliminary investigation into basic design principles of wind-driven ventilation for tall buildings where simplified “bluff body” models of 25 storeys rectangular plan building with central atrium and through opening at the ground floor were tested with seven alternative conceptual wind scoops in an Atmospheric Boundary Layer Wind Tunnel. The test reveals that by making the top section of the wind scoop slopes downwards, the whole atrium become pressurised. Wind scoop with 30° to 45° pitch angle produces consistent high positive pressure differences across the building at almost all the floors. Therefore, if inlet and outlet openings are to be provided, a continuous cross-flow of air could be induced from the windward to the leeward facades across the building. The experiment concluded that, in tropical condition, wind induced ventilation can be introduced quite successfully into the entire tall isolated building by incorporating atrium and rooftop wind scoops.
