An assessment of the performance of diffuser augmented wind turbines (DAWT's)

G.J.W. Bussel, van

    Research output: Chapter in Book/Report/Conference proceedingChapterAcademicpeer-review

    27 Citations (Scopus)

    Abstract

    Diffusers placed around wind turbines may augment its power for a given wind speed. Based upon experimental velocity augmentations found at the nozzle of such diffusers enormous power augmentations are sometimes claimed for DAWT's. By application of straightforward momentum theory it is shown that the linear - cube relation between wind speed and power is not valid for the high velocities obtained inside the diffuser. A considerable (negative) back pressure results at the exit of a diffuser However this is equivalent to the pressure in the near wake of an ordinary wind turbine. The theory shows that the achievable DAWT performance is comparable to the performance of a standard HAWT (horizontal axis wind turbine) having a diameter equal to the exit diameter of the diffuser. By introduction of an extra back pressure at the exit may however increase the performance to some extent.
    Original languageEnglish
    Title of host publicationProceedings of the 1999 3rd ASME/JSME Joint Fluids Engineering Conference, FEDSM'99, San Francisco, California, USA, 18-23 July 1999 (CD-ROM)
    PublisherAmerican Society of Mechanical Engineers
    Pages1-
    ISBN (Print)9780791819616
    Publication statusPublished - 1999
    Event1999 ASME Fluids Engineering Division Summer Meeting (FEDSM 1999) - San Francisco, United States
    Duration: 18 Jul 199923 Jul 1999

    Publication series

    NameASME FED
    Volume248

    Conference

    Conference1999 ASME Fluids Engineering Division Summer Meeting (FEDSM 1999)
    Abbreviated titleFEDSM '99
    CountryUnited States
    CitySan Francisco
    Period18/07/9923/07/99
    Other

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