Experimental study of effects of separation distance between twin high-rise tower models on gaseous diffusion behind the downwind tower model

摘要

Twin high-structures give rise to the additional complexity of a nearby structure. The separation distances between twin high-rise towers have especially large effects on the flow and the concentration fields around them. Wind tunnel experiments have shown that the primary effect of the upwind tower is to retard the flow separation on the top and sides of the downwind tower, provided the separation distance between the twin tower models is less than the building height (L/H < 1.0). Experimental formulas for predicting vertical building surface concentration profiles on the downwind tower have been derived with a mean prediction error of 22%.