Wind-Tunnel studies of variable stack heights for a low-profile building

Abstract

An experimental wind-tunnel study of a proposed building with an exhaust stack was carried out. Smoke tracer techniques were employed to identify the wake and vortex shedding that was caused by the upstream edges or corners of the building. The data was used to determine a stack height required for the stack outlet to be free of the upstream wake effects. Additionally, smoke tracer experiments where smoke was emitted from the stack were conducted to identify the downwind dispersion of the smoke plume. Results from this data indicated if stack exhausts impacted upon the building roof or the downwind distance for the plume to reach ground level. An atmospheric wind tunnel was used to conduct the experiments. A 1:300 scale model of the building and its surroundings was placed in the tunnel and experiments were carried out to represent wind directions from the north, south, east, and west. Two different stack locations and three different stack heights were used in the experiments.