An aerodynamic optimization design study on the bio-inspired airfoil with leading-edge tubercles

Lu, Yu; Li, Ziying; Chang, Xin; Chuang, Zhenju; Xing, Junhua

doi:10.1080/19942060.2020.1856723

Cited by 12 publications

(6 citation statements)

References 53 publications

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“…As mentioned earlier, optimization methods for the airfoil profiles can be a game changer in airfoil design and the aerospace industry. With a focus on aerodynamic performance, Lu et al [199] investigated the optimization of the bio-inspired wing with LE tubercles. Aiming to delay stall and increase lift, the authors generated a dataset containing random wavy configurations (Figure 4) using a parameterized approach with F-spline curves and evaluated those using CFD computations.…”

Section: Leading Edge Treatmentsmentioning

confidence: 99%

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Recent Advances in Airfoil Self-Noise Passive Reduction

Amirsalari,

Rocha

2023

Aerospace

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Airflow-induced noise prediction and reduction is one of the priorities for both the energy and aviation industries. This review paper provides valuable insights into flow-induced noise computation, prediction, and optimization methods with state-of-the-art efforts in passive noise reduction on airfoils, blades, and wings. This review covers the combination of several approaches in this field, including analytical, numerical, empirical, semi-empirical, artificial intelligence, and optimization methods. Under passive noise reduction techniques, leading and trailing edge treatments, porous materials, controlled diffusion airfoils, morphing wings, surface treatments, and other unique geometries that researchers developed are among the design modification methods discussed here. This work highlights the benefits of incorporating multiple techniques to achieve the best results concerning the desired application and design. In addition, this work provides an overview of the advantages and disadvantages of each tool, with a particular emphasis on the possible challenges when implementing them. The methods and techniques discussed herein will help increase the acoustic efficiency of aerial structures, making them a beneficial resource for researchers, engineers, and other professionals working in aviation noise reduction.

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Section: Leading Edge Treatmentsmentioning

confidence: 99%

“…The optimum designs were then achieved by employing the Non-dominated Sorting GA [134] and RSM [200] based on the Kriging Model [126]. [199].…”

Section: Leading Edge Treatmentsmentioning

confidence: 99%

Recent Advances in Airfoil Self-Noise Passive Reduction

Amirsalari,

Rocha

2023

Aerospace

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“…Lu et al [13] optimized leading-edge tubercles geometry. The objective functions were delaying stall and increasing lift coefficient between AoAs 12 o and 16 o .…”

Section: M24mentioning

confidence: 99%

An Investigation of the Dependence of 3D Semi-Span Wing Behaviour on the Leading-edge Tubercles Configuration

Abdelkader

Abdelsamie

Elsayed

2022

Engineering Research Journal

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Inspired by nature, experiments on the aerodynamic behavior of wings and wind turbines with sinusoidal leading-edge continued over the last two decades. The studies showed promising results at post-stall flow regimes as tubercles cause a more gradual lift loss and a higher stall angle of attack. This study aims to investigate numerically the dependence of the wing's aerodynamic coefficients on the tubercle's wavelength and amplitude at the stall angle of attack and 3D flow regime. The results show that increasing the tubercle's average amplitude up to 0.02 of the average chord increases the lift coefficient by 23.61% and decreases the drag coefficient by 4.61%. Similarly, decreasing the wavelength especially up to 1.1096 of the average chord increases the lift coefficient up to 21.55% and decreases the drag coefficient by 9.50%. Flow visualization shows that zones of attaching and separation flow form on the suction surface of the scalloped wings whereas the baseline wing is in a deep stall.

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“…The leading-edge tubercle airfoil is typically constructed by introducing the sinusoidal variations on the local chord length (c) at the leading-edge side of the baseline airfoil. Note that the tubercles can be designed at an isolated location 20,21 or in the form of a continuous pattern 6,22 along the leading-edge of the airfoil. In general, these tubercle airfoils 6 are named with respect to the amplitude (A) and wavelength (k) of the sinusoid profile followed in constructing the tubercle shape, which are generally expressed as percentages of the baseline airfoil's chord length (c), as shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

On the investigation of the aerodynamics performance and associated flow physics of the optimized tubercle airfoil

Pinapatruni,

Duddupudi,

Dash

et al. 2024

Physics of Fluids

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In the present study, the evolutionary multi-objective optimization is employed to design the optimum amplitude and wavelength of sinusoidal leading-edge tubercles for the NACA0012 (National Advisory Committee for Aeronautics) airfoil to improve its aerodynamic performance at Reynolds number of 5.0 × 104 than that of the NACA0012 smooth leading-edge or baseline airfoil. Here, the optimum tubercle is found to have an amplitude of 11.71% and a wavelength of 25% of the baseline airfoil chord, respectively. Through a combination of in-house water tunnel experiments and numerical simulations, it is additionally established that the optimized tubercle airfoil exhibits superior lift and reduced drag characteristics compared to the baseline airfoil, particularly in the post-stall high angle of attack regime. Furthermore, it is noticed that the optimized tubercle design enhances the gap between large separation regions or stall cells along the tubercle airfoil span during the post-stall regime. Consequently, a more pronounced attached flow regime is developed between the consecutive stall cells, contributing to the tubercle airfoil's improved aerodynamic characteristics compared to the baseline airfoil. Our investigations also revealed that the formation and arrangement of the stall cells on the tubercle airfoil span are associated with a biased wake mechanism similar to the one observed in the wake of side-by-side arranged circular cylinders.

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An aerodynamic optimization design study on the bio-inspired airfoil with leading-edge tubercles

Cited by 12 publications

References 53 publications

Recent Advances in Airfoil Self-Noise Passive Reduction

Recent Advances in Airfoil Self-Noise Passive Reduction

An Investigation of the Dependence of 3D Semi-Span Wing Behaviour on the Leading-edge Tubercles Configuration

On the investigation of the aerodynamics performance and associated flow physics of the optimized tubercle airfoil

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