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Fluid forces on a very low Reynolds number airfoil and their prediction
- Source :
-
International Journal of Heat & Fluid Flow . Feb2011, Vol. 32 Issue 1, p329-339. 11p. - Publication Year :
- 2011
-
Abstract
- Abstract: This paper presents the measurements of mean and fluctuating forces on an NACA0012 airfoil over a large range of angle (α) of attack (0–90°) and low to small chord Reynolds numbers (Rec ), 5.3×103–5.1×104, which is of both fundamental and practical importance. The forces, measured using a load cell, display good agreement with the estimate from the LDA-measured cross-flow distributions of velocities in the wake based on the momentum conservation. The dependence of the forces on both α and Rec is determined and discussed in detail. It has been found that the stall of an airfoil, characterized by a drop in the lift force and a jump in the drag force, occurs at Rec ⩾1.05×104 but is absent at Rec =5.3×103. A theoretical analysis is developed to predict and explain the observed dependence of the mean lift and drag on α. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 0142727X
- Volume :
- 32
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- International Journal of Heat & Fluid Flow
- Publication Type :
- Academic Journal
- Accession number :
- 57516874
- Full Text :
- https://doi.org/10.1016/j.ijheatfluidflow.2010.07.008