Numerical study of airfoil thickness effects on the performance of J-shaped straight blade vertical axis wind turbine

Mahdi Zamani, Mohammad Javad Maghrebi*, Sajad A. Moshizi

*Corresponding author for this work

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Providing high starting torque and efficiency simultaneously is a significant challenge for vertical axis wind turbines (VAWTs). In this paper, a new approach is studied in order to modify VAWTs performance and cogging torque. In this approach, J-shaped profiles are exploited in the structure of blades by means of eliminating the pressure side of airfoil from the maximum thickness toward the trailing edge. This new profile is a new type of VAWT airfoil using the lift and drag forces, thereby yielding a better performance at low TSRs. To simulate the fluid flow of the VAWT along with J-shaped profiles originated from NACA0018 and NACA0030, a two-dimensional computational analysis is conducted. The Reynolds Averaged Navier-Stokes (RANS) equations are closed using the two-equation Shear Stress Transport (SST) turbulence model. The main objective of the study is to investigate the effects of J-shaped straight blade thickness on the performance characteristics of VAWT. The results obtained indicate that opting for the higher thickness in J-shaped profiles for the blade sections leads the performance and cogging torque of VAWT to enhance dramatically.

Original languageEnglish
Pages (from-to)595-616
Number of pages22
JournalWind and Structures, An International Journal
Volume22
Issue number5
DOIs
Publication statusPublished - 2016
Externally publishedYes

Keywords

  • VAWT
  • J-shaped profile
  • thickness
  • numerical simulation
  • cogging torque

Fingerprint Dive into the research topics of 'Numerical study of airfoil thickness effects on the performance of J-shaped straight blade vertical axis wind turbine'. Together they form a unique fingerprint.

Cite this