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Aerodynamic and stability characteristics of NACA4412 in ground effects

Aerodynamic and stability characteristics of NACA4412 in ground effects Purpose of paper The potential increase in aerodynamic efficiency whilst operating in close proximity to the ground has stimulated substantial interests in the design and applications of WingInGround WIG craft. The purpose of this paper is to investigate the aerodynamic and stability characteristics, such as the Aerodynamic Center of Height ACH and the Aerodynamic Center of Pitch ACP of a NACA4412 airfoil in ground effect and give clear physical and mathematical definitions of ACH and ACPDesignmethodologyapproach Both a panel method and a Finite Volume Method FVM have been employed to analyze the aerodynamic and stability characteristics numerically in this paper.Findings It is found that for the range of heights and pitch angles investigated, ACH of a NACA 4412 airfoil is only a function of pitch angle while ACP is only a function of height. The ACH of a NACA4412 airfoil lies behind the ACP. When viscous effects are taken into account, the ACH of the NACA4412 airfoil moves further forwards due to boundary layer decambering effects.Originalityvalue These findings are important for preliminary WIGcraft design and analysis in term of airfoil selection. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png International Journal of Intelligent Unmanned Systems Emerald Publishing

Aerodynamic and stability characteristics of NACA4412 in ground effects

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References (5)

Publisher
Emerald Publishing
Copyright
Copyright © Emerald Group Publishing Limited
ISSN
2049-6427
DOI
10.1108/20496421311330065
Publisher site
See Article on Publisher Site

Abstract

Purpose of paper The potential increase in aerodynamic efficiency whilst operating in close proximity to the ground has stimulated substantial interests in the design and applications of WingInGround WIG craft. The purpose of this paper is to investigate the aerodynamic and stability characteristics, such as the Aerodynamic Center of Height ACH and the Aerodynamic Center of Pitch ACP of a NACA4412 airfoil in ground effect and give clear physical and mathematical definitions of ACH and ACPDesignmethodologyapproach Both a panel method and a Finite Volume Method FVM have been employed to analyze the aerodynamic and stability characteristics numerically in this paper.Findings It is found that for the range of heights and pitch angles investigated, ACH of a NACA 4412 airfoil is only a function of pitch angle while ACP is only a function of height. The ACH of a NACA4412 airfoil lies behind the ACP. When viscous effects are taken into account, the ACH of the NACA4412 airfoil moves further forwards due to boundary layer decambering effects.Originalityvalue These findings are important for preliminary WIGcraft design and analysis in term of airfoil selection.

Journal

International Journal of Intelligent Unmanned Systems – Emerald Publishing

Published: May 10, 2013

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