Loading...

Experimental study of flow field on stepped airfoil at very low Reynolds number

Kamyab Matin, R ; Sharif University of Technology

739 Viewed
  1. Type of Document: Article
  2. DOI: 10.1177/0954410016658077
  3. Abstract:
  4. In this article, the flow field around NACA0024 airfoil with step at lower and upper surfaces is experimentally investigated. For this purpose, particle image velocimetry technique based on the instantaneous flow structures is used to investigate the flow field around the airfoil at different times. All the experimental measurements in current study are conducted at very low Reynolds number condition based on the chord of the airfoil (Re=2000) and at angles of attack at 0° and 5° where the flow around airfoils is separated. The differences between vortical structures, mean streamlines, sizes of the wake regions, and vortex shedding of the stepped airfoils compared to unmodified airfoil are observed. The results disclose that using step in airfoil leads to a decrease in the Strouhal number. In addition, the formation of vortices in wake region and their positions at different times are discussed. © Institution of Mechanical Engineers 2016
  5. Keywords:
  6. Particle image velocimetry ; Stepped airfoil ; Very low Reynolds number ; Flow fields ; Flow visualization ; Reynolds number ; Velocimeters ; Velocity measurement ; Vortex flow ; Wakes ; Aero-dynamic performance ; Angles of attack ; Instantaneous flow ; Low Reynolds number ; Particle image velocimetries ; Particle image velocimetry technique ; Upper surface ; Vortical structures ; Airfoils
  7. Source: Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering ; Volume 231, Issue 9 , 2017 , Pages 1706-1717 ; 09544100 (ISSN)
  8. URL: http://journals.sagepub.com/doi/abs/10.1177/0954410016658077?journalCode=piga