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Altering flight stability characteristics of a high-performance aircraft through wing strake modification

Published online by Cambridge University Press:  18 April 2024

H. Raza Open the ORCID record for H. Raza [Opens in a new window] ,
A. Maqsood Open the ORCID record for A. Maqsood [Opens in a new window]  and
J. Masud
H. Raza
Affiliation:
School of Interdisciplinary Engineering and Science (SINES), NUST, Islamabad, Pakistan
A. Maqsood*
Affiliation:
National University of Sciences and Technology, Islamabad, Pakistan
J. Masud
Affiliation:
Air University, Islamabad, Pakistan
*
Corresponding author: A. Maqsood; Email: adnan@sines.nust.edu.pk
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Abstract

Changes in flight stability characteristics at the advanced stage of aircraft design are complex and require thorough investigations. This paper examines the impact of wing strake modification on high-performance aircraft using computational fluid dynamics (CFD). The dynamic behaviour is calculated using the forced oscillation technique, while the effect of geometric variation on longitudinal stability characteristics is extensively studied. Steady-state experimental data is utilised to validate the computational setup. Static aerodynamic coefficients, dynamic stability derivatives and the positions of aerodynamic and pressure centres are employed to quantify the changes. Furthermore, the alterations in stability characteristics are correlated with flow physics. The results indicate a reduction in longitudinal static and dynamic stability at various flight conditions due to the proposed modification. This deliberate reduction was necessary to accommodate the installation of a fly-by-wire system. The discussed design changes have been effectively implemented on an in-service aircraft.

Keywords

Longitudinal StabilityComputational Fluid Dynamics (CFD)AerodynamicsWing-StrakeVortex Flow
Type
Research Article
Information
The Aeronautical Journal , First View , pp. 1 - 21
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Copyright
© National University of Sciences and Technology, 2024. Published by Cambridge University Press on behalf of Royal Aeronautical Society

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