Different functionalized chord and twist distributions in aerodynamic design of HAWTs

Mojtaba Tahani, Ghazale Kavari, S. Mojtaba M. Hosseini, Samira Ghiyasi

Research output: Contribution to journalJournal articleResearchpeer-review

3 Citations (Scopus)

Abstract

In this study, blade element momentum (BEM) theory has been used to calculate power output and performance of 100 kW and 1 MW horizontal axis wind turbine. Riso‐A1‐21 airfoils are considered as utilized section along the blade span. Generally, Riso family of airfoils is appropriate for wind turbine application. In order to improve the accuracy of turbine performance prediction, lots of corrections have been applied on the BEM method. The aim of this research study is proposing a new procedure to introduce the chord and twist distributions by fitting different types of functions on them. Accordingly, 48 functions are selected as possible distributions for chord and twist angle profiles. These functions are selected in such a way that their behavior is close to the trend of their classical distributions. The utilized design method in this study is optimum in terms of performance and also making distribution of chord and twist functional which is more appropriate for manufacturing process. Finally, the effect of using best functions on blade aerodynamic coefficients has been studied. Results show that despite the changing chord and twist distributions from their classical trends, the aerodynamic coefficients are approximately similar to those in the classical design except in some region of blade.
Original languageEnglish
Article number13108
JournalEnvironmental Progress & Sustainable Energy
Volume38
Issue number4
Number of pages8
ISSN1944-7442
DOIs
Publication statusPublished - Jul 2019

Keywords

  • Horizontal axis wind turbine (HAWT)
  • Aerodynamic
  • BEM
  • Blade shape
  • Functional chord and twist distributions

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