Compact shrouds for wind turbines

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Abstract

As part of a large project aimed at finding the optimal configuration for an aerogenerator to exploit wind power, an investigation was launched to find the most compact shroud possible. The dominant contributor to the shroud length is the structure downstream of the turbine (the diffuser). This component has an ever increasing cross-section as one progresses downstream, however, fast rate of area divergence will cause flow separation and the significant reduction in output power associated with it. It is the purpose of the present paper to demonstrate ways to overcome this difficulty. This can be achieved either by proper diversion and introduction of the shroud's external flow into the diffuser's inner boundary layer or alternatively, by the usage of a ring-flap.

Original languageEnglish
Pages (from-to)149-157
Number of pages9
JournalEnergy Conversion
Volume16
Issue number4
DOIs
StatePublished - 1 Jan 1977

Keywords

  • Diffuser augmented wind turbine
  • Flow bleeding (blowing)
  • Ring-flap
  • Wind power

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