A modified dynamic stall model for low mach numbers

Sheng, W., Galbraith, R. A. and Coton, F. N. (2008) A modified dynamic stall model for low mach numbers. Journal of Solar Energy Engineering, 130(3), 031013-1. (doi:10.1115/1.2931509)

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Publisher's URL: http://dx.doi.org/10.1115/1.2931509

Abstract

The Leishman–Beddoes dynamic stall model is a popular model that has been widely applied in both helicopter and wind turbine aerodynamics. This model has been specially refined and tuned for helicopter applications, where the Mach number is usually above 0.3. However, experimental results and analyses at the University of Glasgow have suggested that the original Leishman–Beddoes model reconstructs the unsteady airloads at low Mach numbers less well than at higher Mach numbers. This is particularly so for stall onset and the return from the fully stalled state. In this paper, a modified dynamic stall model that adapts the Leishman–Beddoes dynamic stall model for lower Mach numbers is proposed. The main modifications include a new stall-onset indication, a new return modeling from stalled state, a revised chordwise force, and dynamic vortex modeling. The comparisons to the Glasgow University dynamic stall database showed that the modified model is capable of giving improved reconstructions of unsteady aerofoil data in low Mach numbers.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Galbraith, Professor Roderick and Sheng, Mr Wanan and Coton, Professor Frank
Authors: Sheng, W., Galbraith, R. A., and Coton, F. N.
Subjects:T Technology > T Technology (General)
College/School:College of Science and Engineering > School of Engineering > Aerospace Sciences
Research Group:Low Speed Aerodynamics
Journal Name:Journal of Solar Energy Engineering
Publisher:American Society of Mechanical Engineers
ISSN:0199-6231
ISSN (Online):1528-8986
Published Online:03 July 2008

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