Abstract
This document presents the results of experimental research performed to study the flow characteristics of isothermal jets issuing from vortes diffusers and to compare the vortex diffuser's performance with that of a conventional diffuser. Two styles of vortex diffusers and one conventional circular ceiling diffusers were used. For each diffuser, measurements were performed to obtain a velocitymap, velocity profile, and velocity decay at three different flow rates. A series of flow visualization experiments was undertaken to capture the general behavior of jets issuing from the diffusers. Overall, it was found that the vortex diffusers produce slightly more induction (mixing) of ambient air in comparison to the conventional diffuser. This difference is probably caused by theturbulence produced as a result of the rotational motion near the outlet of the vortex diffusers. The rotational motion disappears within three outlet diameters, and the flow becomes radial.
Original language | American English |
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Pages | 340-346 |
Number of pages | 7 |
State | Published - 1996 |
Event | 1996 Annual Meeting of the American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. - San Antonio, Texas Duration: 22 Jun 1996 → 26 Jun 1996 |
Conference
Conference | 1996 Annual Meeting of the American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. |
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City | San Antonio, Texas |
Period | 22/06/96 → 26/06/96 |
NREL Publication Number
- NREL/CP-23347