Aerodynamic Behavior of a Compound Wing Configuration in Ground Effect

Jamei, Saeed; Maimun, Adi; Mansor, Shuhaimi; Priyanto, Agoes; Azwadi, Nor; Tofa, M. Mobassher

doi:10.11113/jt.v66.2478

Cited by 3 publications

(2 citation statements)

References 5 publications

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“…Figure 2a-b illustrates the drag coefficient and lift to drag ratio of the rectangular wing at ground clearance of 0.15 versus angle of attack. These Figures depict numerical and experimental simulations have similar tendency, however the numerical results had some deviations from experimental [11].…”

Section: 30 Validation Of Numerical Studysupporting

confidence: 51%

Static Stability of a Compound Wing Configuration in Ground Effect

et al. 2014

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The height static stability of a wing can be a main concern for conceptual design of wing-in-ground effect (WIG) crafts. In this research, the stability of a rectangular and compound wing was computationally predicted in ground effect. A realizable k-ε turbulent model was used for simulation the flow filed over the wing surfaces. First, the drag coefficient and lift to drag ratio of numerical simulation were validated by experimental data of the rectangular wing. Next, the stability of the compound wing respect to different ground clearances will be determined and compared with rectangular wing. This study illustrated a deep understanding of static stability of present compound wing in ground effect, which eventually can be a guideline for researchers and designers of WIG craft.

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Section: 30 Validation Of Numerical Studysupporting

confidence: 51%

Static Stability of a Compound Wing Configuration in Ground Effect

et al. 2014

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“…Figure 2a-b illustrates the aerodynamic coefficients of the compound wing for fixed ground at a ground clearance of 0.15, and shows that the numerical and experimental simulations have a similar trend; however, the numerical plot indicates some deviations from the experimental plot (Jamei et al, 2014). …”

Section: Validation Of Numerical Studymentioning

confidence: 99%

Ground Viscous Effect on 3D Flow Structure of a Compound Wing-in-Ground Effect

Jamei¹,

Maimun²,

Azwadi³

et al. 2014

Int J Automot Mech Eng

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The wing-in-ground-effect craft is a new means for traveling on rivers, lakes, and at sea between islands. In this study, the effect of boundary layers due to the ground viscous effect on the aerodynamic coefficients of the compound wing of a WIG craft was numerically investigated. The compound wing is divided into three parts, with one rectangular wing in the middle and two reverse taper wings with an anhedral angle at the sides. A realizable k-ε turbulent model was used for modeling the flow around the wing area. The computational results of the compound wing for fixed ground were compared with the experimental data. The aerodynamic characteristics of the compound wing were examined via both fixed and moving ground for removing the boundary layers effect of the ground. Accordingly, the numerical result indicated that the lift and drag coefficients and lift to drag ratio are affected by the ground boundary layers while the moment coefficient and center of pressure of the compound wing showed little variation with respect to ground boundary conditions. A WIG craft has two advantages compared with aircraft. First is the higher ram pressure because of trapping of the air flow around the stagnation point on the lower surface of the wing in proximity to the ground. Next, the induced drag is weaker because the wing is near the ground, so the tip vortex is trapped by the ground and reduces the strength of vortices (Abramowski, 2007). The effect of ground boundary layers on the performance of the wing-in-ground effect is a challenge for researchers (Marqués-Bruna, 2011;Saad & Bari, 2013;Tahseen, Ishak, & Rahman, 2013;Yang, Yang, & Jia, 2010;Ying, Yang, & Yang, 2010a, 2010b. Yang, Z. G. et al. (2010) showed an effective height decrease because of the rise of ground by using a displacement thickness which caused an over-estimation of the ground effect. A separation bubble was created on the ground when the ground was considered as a fixed boundary. The separation bubble could rise with reduced ground clearance and a higher angle of attack. As a result, the passageway of the air flow was reduced and then the ram effect decreased and lift would be underestimated. In addition,

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Wake behind a Compound Wing in Ground Effect

Jamei

Maimun

Bilandi

et al. 2020

JMSE

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Flow structure is a crucial point for the conceptual design of Wing-in-Ground effect (WIG) crafts. In this study, pressure distributions around a compound wing, velocity and the turbulent intensity distribution in the wake area after trailing of the wing, have been investigated numerically. Computational simulations were completed regarding various angles of attack in-ground-effect. Two parts made up the compound wing: The first composed by one rectangular wing in the center, the second composed by a reverse taper wing, consisting of an anhedral angle at the side. A realizable k-ε turbulent model exhibited the flow field in the physical domain about the wing surface. The numerical results of the compound wing were validated using the data provided by wind tunnel tests. The flow structures around the compound wing were compared with that of a rectangular wing for different conditions. It was found that the pressure distribution on the rectangular wing was weaker than at the lower surface for the compound wing. However, the suction effect on the upper surface of the rectangular wing was higher. Also, the velocity defect and the turbulence level in the wake area was greater behind the compound wing.

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Aerodynamic Behavior of a Compound Wing Configuration in Ground Effect

Cited by 3 publications

References 5 publications

Static Stability of a Compound Wing Configuration in Ground Effect

Static Stability of a Compound Wing Configuration in Ground Effect

Ground Viscous Effect on 3D Flow Structure of a Compound Wing-in-Ground Effect

Wake behind a Compound Wing in Ground Effect

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