Numerical Simulation of NACA 0012 Airfoil Operating under Hailstorm Conditions

Douvi, Dimitra; Douvi, Eleni; Plessas, Dionysios K.; Margaris, Dionissios P.

doi:10.31871/ijntr.7.2.13

Cited by 6 publications

(12 citation statements)

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“…With the increase in AoA, maximal and minimal values of C p are rising. The stagnation point is moving downstream, which is in accordance with (Douvi et al, 2010). An additional overview of the C p distribution for different AoA is given in Figure 10.…”

Section: Resultssupporting

confidence: 74%

Experimental and LBM analysis of medium-Reynolds number fluid flow around NACA0012 airfoil

Rak

Grbčić

Sikirica

et al. 2023

HFF

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Purpose The purpose of this paper is the examination of fluid flow around NACA0012 airfoil, with the aim of the numerical validation between the experimental results in the wind tunnel and the Lattice Boltzmann method (LBM) analysis, for the medium Reynolds number (Re = 191,000). The LBM–large Eddy simulation (LES) method described in this paper opens up opportunities for faster computational fluid dynamics (CFD) analysis, because of the LBM scalability on high performance computing architectures, more specifically general purpose graphics processing units (GPGPUs), pertaining at the same time the high resolution LES approach. Design/methodology/approach Process starts with data collection in open-circuit wind tunnel experiment. Furthermore, the pressure coefficient, as a comparative variable, has been used with varying angle of attack (2°, 4°, 6° and 8°) for both experiment and LBM analysis. To numerically reproduce the experimental results, the LBM coupled with the LES turbulence model, the generalized wall function (GWF) and the cumulant collision operator with D3Q27 velocity set has been used. Also, a mesh independence study has been provided to ensure result congruence. Findings The proposed LBM methodology is capable of highly accurate predictions when compared with experimental data. Besides, the special significance of this work is the possibility of experimental and CFD comparison for the same domain dimensions. Originality/value Considering the quality of results, root-mean-square error (RMSE) shows good correlations both for airfoil’s upper and lower surface. More precisely, maximal RMSE for the upper surface is 0.105, whereas 0.089 for the lower surface, regarding all angles of attack.

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Section: Resultssupporting

confidence: 74%

Experimental and LBM analysis of medium-Reynolds number fluid flow around NACA0012 airfoil

Rak

Grbčić

Sikirica

et al. 2023

HFF

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“…Table 4 depicts the relationship between the angle of attack and the coefficient of lift (irregular airfoil). 5. In Table 5, the change in the coefficient of drag with the change in the angle of attack is shown (irregular airfoil).…”

Section: Tables and Figuresmentioning

confidence: 99%

“…Their work focused on a constant Reynolds number for analysis, and it shed light on the symmetric properties of the NACA 0012 airfoil. A structured mesh was generated in their study and analysis was conducted at four angles of attack (5,8,11, and 13 degrees).…”

Section: Figures: 1 Introductionmentioning

confidence: 99%

Numerical Analysis of Turbulent Flow around an Irregularly Shaped Airfoil

Ahmed,

Bangalee,

Hossain

et al. 2024

Preprint

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An airfoil is the shape of a wing. Simply put, it is the cross-section of any lift and drag-producing body. For an airplane to take flight, the most important part is played by the wings. The interaction between air and the wings of an aircraft can be tricky as there are several parameters at work. As stated above, an airfoil is a cross-section of a wing and, therefore, two-dimensional. Analyzing a two-dimensional body is both time and resource-efficient. The objective of this thesis is to study the impact and determine the factors that govern the flow around a modified airfoil in turbulence. In extreme situations, such as a tropical storm, the wing of an airfoil might get damaged and result in an accident. This work will further demonstrate the traits of the airfoil in such a situation. The forces acting on an airfoil like lift, drag, and the changes in momentum will all be discussed in the present study.

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“…The wall shear stress is an important quantity in fluid dynamics that plays a leading role in many industrial applications, such as in aviation and the shipping industry (Douvi and margaris, 2015). The wall shear stress can be directly linked to fuel consumption and energy efficiency; hence measurements of the wall shear stress have attracted attention for many decades (Douvi and margaris, 2015;Mayer, 1998;Haff et al, 2018). A thorough review of the early attempts to measure the wall shear stress can be found in (Haritonidis, 1989).…”

Section: Introductionmentioning

confidence: 99%