Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.13/927877

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Title
Fluid forces on a very low Reynolds number airfoil and their prediction
Author/Creator
Zhou, Y.;  Alam, Md Mahbub;  Yang, H. X.;  Guo, H.;  Wood, D. H.
Institution
The University of Newcastle. Faculty of Engineering & Built Environment, School of Engineering
Description
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.
Relation
International Journal of Heat and Fluid Flow Vol. 32, Issue 1, p. 329-339
Publisher Link
http://dx.doi.org/10.1016/j.ijheatfluidflow.2010.07.008
Date
2010
Publisher
Elsevier
Keyword(s)
low Reynolds number airfoil;  stall of airfoil;  aerodynamics of airfoil;  Reynolds number effect
Resource Type
journal article
Identifier
http://hdl.handle.net/1959.13/927877
Identifier
ISSN:0142-727X
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Subject
"International Journal of Heat and Fluid Flow"
 
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