Investigation of Variable Spanwise Waviness Wavelength Effect on Wing Aerodynamic Performance

Tunio, Intizar Ali; Kumar, Dileep; Hussain, Tanweer; Jatoi, Munsif Ali; Safiullah,

doi:10.1134/s0015462820040102

Cited by 6 publications

(4 citation statements)

References 18 publications

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“…However, Jabbari et al [27], by employing static roughness elements, significantly improved the performance of these unconventional wing configurations. The aerodynamic performance of varying leading-edge tubercle configurations was numerically [28,29] and experimentally [30] evaluated, indicating that a larger tubercle amplitude leads to gentler stall, while a smaller tubercle wavelength improves maximum lift. The application of this distinctive feature has recently extended into the realm of water turbine design [31][32][33].…”

Section: Introduction 1backgroundmentioning

confidence: 99%

Investigating Mechanical Response and Structural Integrity of Tubercle Leading Edge under Static Loads

Esmaeili,

Jabbari,

Zehtabzadeh

et al. 2024

Modelling

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This investigation into the aerodynamic efficiency and structural integrity of tubercle leading edges, inspired by the agile maneuverability of humpback whales, employs a multifaceted experimental and computational approach. By utilizing static load extensometer testing complemented by computational simulations, this study quantitatively assesses the impacts of unique wing geometries on aerodynamic forces and structural behavior. The experimental setup, involving a Wheatstone full-bridge circuit, measures the strain responses of tubercle-configured leading edges under static loads. These measured strains are converted into stress values through Hooke’s law, revealing a consistent linear relationship between the applied loads and induced strains, thereby validating the structural robustness. The experimental results indicate a linear strain increase with load application, demonstrating strain values ranging from 65 με under a load of 584 g to 249 με under a load of 2122 g. These findings confirm the structural integrity of the designs across varying load conditions. Discrepancies noted between the experimental data and simulation outputs, however, underscore the effects of 3D printing imperfections on the structural analysis. Despite these manufacturing challenges, the results endorse the tubercle leading edges’ capacity to enhance aerodynamic performance and structural resilience. This study enriches the understanding of bio-inspired aerodynamic designs and supports their potential in practical fluid mechanics applications, suggesting directions for future research on manufacturing optimizations.

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Section: Introduction 1backgroundmentioning

confidence: 99%

Investigating Mechanical Response and Structural Integrity of Tubercle Leading Edge under Static Loads

Esmaeili,

Jabbari,

Zehtabzadeh

et al. 2024

Modelling

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show abstract

“…Moreover, the numerous studies have been conducted to analyze the aerodynamic performance of the aircraft wing. Recently a numerical study is conducted [34] to investigated the effect of changing wavelength of a finite wingspan and studied the flow behavior in pre-stall and post-stall regimes. Two different wavy models are used named as (𝜆0305h1) and (𝜆0503h1) with increasing wavelength and decreasing wavelength from root to tip respectively.…”

Section: Introductionmentioning

confidence: 99%

Aerodynamic Performance Enhancement of Low Aspect Ratio Military Drone Aircraft Wing through Employing Leading Edge Tubercles

2024

IJFMR

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Present study aim to improve the aerodynamic performance of low Aspect Ratio (AR) military drone aircraft wing, through employing leading edge tubercle. For that purpose two wing model were design one with smooth leading edge and second with tubercle leading edge. The wing models were developed by using NACA0012 airfoil profile, whereas tubercles of amplitude 5% of chord (c) and wavelength of 11% of c is employed. The numerical simulation as performed at chord based Reynolds number of 140000 in pre-stall and post stall regime. The computational fluid dynamic simulation is performed at different angle of attack ranging from 0 degree to 25 degree with the interval of 5 degree. Computational Fluid Dynamics (CFD) results reveal that tubercle at the leading edge of the low AR wing has favorable effect on the wing performance. Aerodynamic performance of both smooth leading edge and tubercle leading edge wing is similar up to 15o angle of attack, whereas at 20 degree and 25 degree significant improvement in Lift-to-Drag L/D ratio is observed. It is estimated that at maximum increment of 53% in lift coefficient ii achieved at 25 degree angle of attack for as compared to smooth LE wing model. Moreover, maximum 20.5% decrease in drag coefficient is estimated in case of tubercle leading edge as compared to baseline model at 20 degree angle of attack. The critical observation of field around the tubercle leading edge wing is found that tubercles restrict flow separation through generation of low strength vortices; these vortices enhance momentum exchange within the boundary layer.

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“…The addition of passive flow control devices is a widespread practice, as these devices can significantly improve aerodynamic performance in a simple way and without requiring an external power source. For example, Fernandez-Gamiz et al (2017) added microtabs on the Trailing Edge (TE) of a DU91W(2)250 airfoil, Aramendia et al (2019) added Gurney flaps on the same airfoil, and Tunio et al (2020) implemented a spanwise waviness on a NACA0021 airfoil. Due to the complexity of their design and the need of an external power source, active devices are less popular than passive devices.…”

Section: Introductionmentioning

confidence: 99%

Active Flow Control on Airfoils by Reinforcement Learning

Portal-Porras,

Fernandez-Gamiz,

Zulueta

et al. 2023

Preprint

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Investigation of Variable Spanwise Waviness Wavelength Effect on Wing Aerodynamic Performance

Cited by 6 publications

References 18 publications

Investigating Mechanical Response and Structural Integrity of Tubercle Leading Edge under Static Loads

Investigating Mechanical Response and Structural Integrity of Tubercle Leading Edge under Static Loads

Aerodynamic Performance Enhancement of Low Aspect Ratio Military Drone Aircraft Wing through Employing Leading Edge Tubercles

Active Flow Control on Airfoils by Reinforcement Learning

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