Fluid forces on a very low Reynolds number airfoil and their prediction

Title: Fluid forces on a very low Reynolds number airfoil and their prediction
Creator: Zhou, Y.; Alam, Md Mahbub; Yang, H. X.; Guo, H.; Wood, D. H.
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
Publisher: Elsevier
Resource Type: journal article
Date: 2010
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.
Subject: low Reynolds number airfoil; stall of airfoil; aerodynamics of airfoil; Reynolds number effect
Identifier: http://hdl.handle.net/1959.13/927877
Identifier: uon:10276
Identifier: ISSN:0142-727X
Language: eng
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