Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/30700
Title: Fluid forces on a very low Reynolds number airfoil and their prediction
Authors: Zhou, Y
Alam, MM
Yang, HX 
Guo, H
Wood, DH
Keywords: Aerodynamics of airfoil
Low Reynolds number airfoil
Reynolds number effect
Stall of airfoil
Issue Date: 2011
Publisher: Elsevier
Source: International journal of heat and fluid flow, 2011, v. 32, no. 1, p. 329-339 How to cite?
Journal: International journal of heat and fluid flow 
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.
URI: http://hdl.handle.net/10397/30700
ISSN: 0142-727X
DOI: 10.1016/j.ijheatfluidflow.2010.07.008
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