Numerical study of cavity flow control on wig craft with stepped hull

Nor Zaidi, Muhammad Amirul Adli and Mohd Sabri, Muhammad Aqil Karimi and Andan, Amelda Dianne and Abdullah, Nur Azam and Mohammed Aldheeb, Mohammed Abdulmalek and Saad, Mohd Rashdan (2025) Numerical study of cavity flow control on wig craft with stepped hull. Journal of Aeronautics, Astronautics and Aviation, 57 (3S). pp. 485-494. ISSN 1990-7710

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Abstract

A wing-in-ground (WIG) craft is designed to fly at low altitudes, using the ground effects to enhance its aerodynamic performance, thereby reducing fuel consumption and improving overall efficiency. However, incorporating a stepped hull into a WIG craft can increase aerodynamic drag during flight. The steep geometry of the stepped hull causes flow separation, reducing the craft's aerodynamic performance. This study aims to evaluate the impact of using a cavity as the passive flow control mechanism on the aerodynamic performance of a WIG craft with a stepped hull. Four numerical simulations are conducted to investigate the effects of different cavity configurations. The findings indicate that cavities are able to enhance the aerodynamics of WIG craft, particularly behind the backward-facing step of a stepped hull. A cavity with an aspect ratio of 2, positioned at a distance of 2h from the step, can reduce the drag coefficient by up to 5.11% and increase the lift-to-drag ratio, C_L/C_D by up to 5.17% compared to the conventional WIG craft.

Item Type:	Article (Journal)
Uncontrolled Keywords:	Cavity ； Flow control ； Wing-in-ground craft ； ； WIG
Subjects:	T Technology > TJ Mechanical engineering and machinery > TJ170 Mechanics applied to machinery. Dynamics T Technology > TJ Mechanical engineering and machinery > TJ210.2 Mechanical devices and figures. Automata. Ingenious mechanism. Robots (General) T Technology > TL Motor vehicles. Aeronautics. Astronautics T Technology > TL Motor vehicles. Aeronautics. Astronautics > TL500 Aeronautics
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering > Department of Mechanical Engineering Kulliyyah of Engineering
Depositing User:	Ir.Ts.Dr. Nur Azam Abdullah
Date Deposited:	23 Apr 2025 10:33
Last Modified:	23 Apr 2025 10:33
URI:	http://irep.iium.edu.my/id/eprint/120684

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