Abstract
The purpose of this study was to investigate velocity characteristics for various shapes of exhaust inlets facing an external boundary surface. This configuration approximates some real world situations more closely than established data for designing freestanding inlets. Inlet shapes studied included plain, flanged, flared and rounded circular inlets and plain and flanged rectangular inlets ranging from square to slot having width-to-length ratios of 1.0, 0.50, 0.25 and 0.10. The inlets were tested under conditions typical of high velocity/low volume exhaust ventilation for which nondimensional centerline velocity gradients (percentage of average face velocity versus diameters/widths) from previous studies were found to be representative of conventional exhaust inlets. Centerline velocities decreased with decreasing distance to the boundary surface, with the extent of decrease being a function of inlet shape. An empirical scheme was developed to approximate the experimental results as an extension of pre...
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