Blade number effect for a ducted wind turbine

Sheng Huan Wang, Shih-Hsiung Chen

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

Ducted wind turbine with multiple blades installed was believed to have a good wind power energy conversion effect. However, little information was available on how to design a good ducted wind turbine. In this paper the effects of blade number on a ducted wind turbine performance is studied. Numerical studies using CFD method to simulate the wind turbine performance were adopted. The duct is a converging-diverging nozzle with the turbine blades located at the throat. A rated output of a 1-kW turbine is adopted as the baseline design. It was found that the blade geometry, stagger angle, and number of blades have different duct blockage effects, and do affect the turbine performance (specifically the power coefficient and torque coefficient, etc.). The fewer number of blades has higher through flow speed, while the larger number of blades provides larger torque. The best power coefficient lies in between the two extremes. The appropriate number of blades is important to match the generator performance curve for optimal overall performance and efficiency.

Original languageEnglish
Pages (from-to)1984-1992
Number of pages9
JournalJournal of Mechanical Science and Technology
Volume22
Issue number10
DOIs
Publication statusPublished - 2008 Oct 1

Fingerprint

Wind turbines
Turbomachine blades
Turbines
Ducts
Torque
Energy conversion
Wind power
Nozzles
Computational fluid dynamics
Geometry

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering

Cite this

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Blade number effect for a ducted wind turbine. / Wang, Sheng Huan; Chen, Shih-Hsiung.

In: Journal of Mechanical Science and Technology, Vol. 22, No. 10, 01.10.2008, p. 1984-1992.

Research output: Contribution to journalArticle

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