Experimental Study of Vortex Diffusers

    Research output: Contribution to conferencePaper

    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 languageAmerican English
    Pages340-346
    Number of pages7
    StatePublished - 1996
    Event1996 Annual Meeting of the American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. - San Antonio, Texas
    Duration: 22 Jun 199626 Jun 1996

    Conference

    Conference1996 Annual Meeting of the American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc.
    CitySan Antonio, Texas
    Period22/06/9626/06/96

    NREL Publication Number

    • NREL/CP-23347

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