Aerodynamic Characteristics of Shark Scale-Based Vortex Generators upon Symmetrical Airfoil

Arunvinthan, S.; Raatan, V. S.; Pillai, S. Nadaraja; Pasha, Amjad Ali; Rahman, Mustafa Mutiur; Juhany, Khalid A.

doi:10.3390/en14071808

Cited by 18 publications

(4 citation statements)

References 49 publications

(30 reference statements)

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“…Note that there is limited data with regard to the effect of VGs on a wing in the flow at low Reynolds number (less than 2 × 10 5 ) [18,19]. In recent years, some researchers have tried to investigate the effect of installing vortex generator on MAVs [20,21]. Applying bio-inspired design of VG to MAVs is a interesting topic that has not been studied yet.…”

Section: Introductionmentioning

confidence: 99%

Aerodynamic effect of an alula-like vortex generator using pressure sensitive paint technique

Chung

Yeh²

2023

Front. Phys.

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Herein, the pressure-sensitive paint (PSP) was used to quantitatively investigate the aerodynamic effect of an alula-like vortex generator, which is a bio-inspired passive flow control structure. The global pressure distributions on the upper surface at different angles of attack were measured to determine the strength of sectional suction forces on the wing. An alula-like vortex generator equipped at the leading edge of the wing enlarged the area of the suction region (negative pressure coefficient) on the upper surface in both the streamwise and spanwise directions under near-stall and deep-stall conditions, which is related to the generation of lift and avoiding the stall of wing. A wing model equipped with a vortex generator of an 11% height/chord length ratio exhibited the greatest performance at all angles of attack. In this study, the use of PSP technique not only helps to understand the aerodynamic effect of the alula-like vortex generator but also shows a perspective tool for bio-inspired MAVs design.

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Section: Introductionmentioning

confidence: 99%

Aerodynamic effect of an alula-like vortex generator using pressure sensitive paint technique

Chung

Yeh²

2023

Front. Phys.

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“…However, it would appear that no experimental or computational findings have been made to back up this assertion. The compactness of VGs provides a practical advantage over their conventional counterparts [9,10].…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical analysis of vortex generators designed for utility vehicles

2023

Archives of Thermodynamics

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The main goal of today's car designers is to minimize fuel consumption in all possible ways at the same time maintaining the vehicle's performance as usual. The goal of this work is to study the effect of adding a vortex generator (VG) on the aerodynamics of the vehicle and fuel economy. Both theoretical and experimental works were carried out and the outcomes of the numerical simulations are contrasted with those of the experimental results. A utility vehicle model with a scale ratio of 1:15 was used as a test model. Experimental research has been done on the fluctuation of the coefficient of pressure, dynamic pressure, and coefficients of lift and drag with and without VG on the roof of a utility vehicle. The delta-shaped VG was put to the test both numerically and experimentally. At a velocity of 2.42 m/s, it is observed that the addition of VG can raise the pressure coefficient by about 17%. When compared to the vehicle model without vortex generators, the velocity profile of the ccomputational fluid dynamics analysis shows that at the back end of the vehicle, the wake has been minimized with VG.

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“…Tubercles also contributed to stall delay and sustained lift at high angles of attack. Arunvinthan, S., et al [17] conducted wind tunnel tests on a NACA 0015 symmetrical airfoil incorporating shark scalebased vortex generators (SSVG). The SSVG integration resulted in reduced drag, increased maximum lift coefficient (CLmax), and improved overall aerodynamic performance.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Location and Shape of Vortex Generators on Aerodynamic Characteristics of a NACA 4415 Airfoil

Abed

2023

NJES

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This study examines the flow behavior and lift coefficient variations of a NACA 4415 airfoil using different vortex generator configurations. Experimental investigations are conducted in a subsonic wind tunnel at a Reynolds number of 1.8 x 105. The airfoil is tested with two types of vortex generators, namely the dome vortex and the convergent-divergent vortex, positioned at 10%, 28%, and 60% chord locations. Experimental lift coefficients are compared with Airfoil Tools database, showing consistent agreement within an angle of attack range of 0 to 18 degrees. At small angles of attack (0 to 8 degrees), the lift coefficients of the NACA 4415 airfoil with the dome vortex at 10%, 28%, and 60% chord positions are lower compared to the baseline configuration. However, beyond 14 degrees, the highest lift coefficient value after the angle range of 14-18 degrees is achieved at the 60% chord position with the dome vortex, 10.43% increase compared to the baseline lift coefficient. Furthermore, the best value for the lift coefficient after the angle range of 16-18 degrees at the 10% chord position is achieved with the dome vortex, where the maximum lift coefficient 9.4% increase compared to the baseline lift coefficient. It is noted that the baseline configuration consistently outperforms the convergent-divergent vortex configurations.

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Aerodynamic Characteristics of Shark Scale-Based Vortex Generators upon Symmetrical Airfoil

Cited by 18 publications

References 49 publications

Aerodynamic effect of an alula-like vortex generator using pressure sensitive paint technique

Aerodynamic effect of an alula-like vortex generator using pressure sensitive paint technique

Experimental and numerical analysis of vortex generators designed for utility vehicles

The Effect of Location and Shape of Vortex Generators on Aerodynamic Characteristics of a NACA 4415 Airfoil

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