Experimental validation of numerical decambering approach for flow past a rectangular wing

Roy, Aritras; Kumar, Ranjan; Mukherjee, Rinku

doi:10.1177/0954410020916311

Cited by 5 publications

(3 citation statements)

References 21 publications

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“…From the literature, a lot of the experimental analyses are carried out to investigate the aerodynamic characteristics of three-dimensional wings without using end plates and achieved good accuracy. 31,32 Therefore, the end plates are not used in the present study as the end plates are usually installed to mitigate the three dimensional effects. The 3D printed wing models were with appropriate angle of attack before closing the test section as shown in Figure 7, by following the procedure similar to that of Roy et al 31 The least count of the force balance is approximately one gram.…”

Section: Methodsmentioning

confidence: 99%

“…31,32 Therefore, the end plates are not used in the present study as the end plates are usually installed to mitigate the three dimensional effects. The 3D printed wing models were with appropriate angle of attack before closing the test section as shown in Figure 7, by following the procedure similar to that of Roy et al 31 The least count of the force balance is approximately one gram. The force balance is designed in such a way that the maximum angle of attack can be set from 0° to 15°.…”

Section: Methodsmentioning

confidence: 99%

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Aerodynamic investigation of Passer domesticus inspired biomimetic wing at low Reynolds number

Shaik

Hazarika

2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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A biomimetic wing is designed by considering the wing of a natural flyer (Passer Domesticus) as a reference. Since the birds have thin wings, Bergey BW-3, a thin and highly cambered airfoil, is used to design wing’s cross-section. To investigate the aerodynamic characteristics of biomimetic wing, numerical and experimental studies are carried out at low Reynolds number (Re) ranging from 2.5x10^4 to 1x10^5. The performance of biomimetic wing is compared with rectangular and elliptical wings at Re = 5x10^4. It is observed that the separation bubble formed over the surface of biomimetic wing at Re = 2.5x10^4 is not strong enough to influence the lift coefficient but dramatically increases the drag coefficient when the mean angle of attack exceeds 18^0. It is observed that the drop in lift coefficient of rectangular wing is higher than that of other wings due to presence of sharp edges in the planform. The lowest drag coefficient is witnessed in elliptical wing but it also has lowest lift coefficient due to the interaction between the separation bubble and tip vortices. But the biomimetic wing offers highest lift coefficient with a considerable amount of drag. It is observed that the flow separates dramatically as the mean angle of attack increases beyond the stall angle in rectangular and elliptical wings. But a delay in the flow separation is observed in case of biomimetic wing after the stall angle. It is also observed that the suction over the wing surface of biomimetic wing is more at wingroot than that at wingtip, which may provide good stability during flight conditions. The enhanced aerodynamic performance of the biomimetic wing is due to change in shape of the wing along the span which has a strong influence over its effective angle of attack with respect to the incoming flow.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Aerodynamic investigation of Passer domesticus inspired biomimetic wing at low Reynolds number

Shaik

Hazarika

2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…The kω− SST model has been used to calculate Reynolds stress in all simulations of the present study. The reason for using this model is to extract results close to experimental data in research around simple wings and the sinusoidal leading edge with the help of this model (Narayan and Bibin, 2016; Roy and Mukherjee, 2020; Aftab et al , 2016). The main structure of this model consists of two equations for calculating the perturbation energy, and the dissipation rate using the function F 1 for the correct guess of the flow according to the flow physics as follows (Wilcox, 1988): …”

Section: Numerical Simulation Methodsmentioning

confidence: 99%

Numerical study of the effect of winglet on the aerodynamic performance of sinusoidal and simple leading-edge wings

Naderinezhad

Djavareshkian

2022

AEAT

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Purpose This study aims to investigate the effectiveness of two types of winglets, multi-tip and raked, on the performance of sinusoidal and simple leading-edge wings and compares it by a numerical method. Design/methodology/approach The wing configuration in this study is rectangular and uses NACA0020 section, and all simulations are performed by a numerical method based on finite volume and base pressure algorithm in Reynolds 2 × [10]^5. In the mentioned numerical method, the flow is considered turbulent, and the k-ω-SST model is used. To calculate the stresses on the wing surface, the mesh is extended to below the viscous layer, and a second-order upstream accuracy is used to calculate the convection flux. Findings The use of raked and multi-tip winglets for the sinusoidal edge of the wing improved aerodynamic performance by 5.12 and 2.28%, respectively, and the greatest effect of these two winglets was on increasing the lifting force and reducing the inductive drag, respectively. Also, by examining the distribution of induced vortices around the configurations, it was found that the curvature of the sinusoidal wing tip at the angles of attack before stall reduced the strength of the induced vortices and, the use of winglet during and after stall, caused increased aerodynamic performance of the sinusoidal wing. Practical implications The whale is an international species of aquatic animal found in most of the world’s oceans. It has large fin aspect ratios that have a series of bulges at the edge of the attack, which improves the aerodynamic performance near and after stall. Today, one of the fields of research is the use of this idea in the wings of micro air vehicle. Originality/value Winglet reduces induced drag in simple wings. So far, the effect of winglets on wings with sinusoidal attack edges has not been investigated.

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Delay or control of flow separation for enhanced aerodynamic performance using an effective morphed surface

Roy

Mukherjee

2022

Acta Mech

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Experimental validation of numerical decambering approach for flow past a rectangular wing

Cited by 5 publications

References 21 publications

Aerodynamic investigation of Passer domesticus inspired biomimetic wing at low Reynolds number

Aerodynamic investigation of Passer domesticus inspired biomimetic wing at low Reynolds number

Numerical study of the effect of winglet on the aerodynamic performance of sinusoidal and simple leading-edge wings

Delay or control of flow separation for enhanced aerodynamic performance using an effective morphed surface

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