VELOCITY-FIELDS IN PROXIMITY OF LOCAL EXHAUST HOOD OPENINGS - AN INTERCOMPARISON BETWEEN CURRENT RECOMMENDED FORMULAS AND EXPERIMENTAL STUDIES

This article is the second part of a previous paper [F. Cascetta, Buil ding and Environment 31, 437-449 (1996)] which illustrated the test fa cility in use, the measurement procedure, and fully described the velo city fields in front of hood openings. A comparison between the main c urrent formulas available in the literature, and the experimental resu lts collected by the authors, is introduced and discussed. The predict ed centerline velocities inferred from the recommended formulas are co mpared with the ones experimentally measured by the authors, for both plain and flanged free-standing circular and rectangular exhaust openi ngs. The velocity field outside the axis of the exhaust hood is also p resented. It was experimentally determined and is expressed in terms o f velocity contours. Copyright (C) 1996 Elsevier Science Ltd.