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Influence of Thickness Ratio on the Aerodynamic Characteristics of a Family of Hybrid Semielliptical Dolphin Airfoils

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Novel Techniques in Maintenance, Repair, and Overhaul (ISATECH 2022)

Part of the book series: Sustainable Aviation ((SA))

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Abstract

The authors of this paper have recently been involved in the development of a novel family of semielliptical hybrid Dolphin airfoils for general aviation applications. The previous work has shown noticeable improvements in aerodynamic characteristics of the modified hybrid Dolphin 2415 airfoil. In this paper, the same method has been applied to the airfoils of different thickness ratios. All numerical calculations were performed using RANS equations with the k−ω SST turbulence model. A comparison between a series of four-digit NACA 24xx, the original Dolphin, and the novel hybrid semielliptical Dolphin airfoils was made. Results have shown that in the range of thickness ratios above 15% and under 12%, the semielliptical hybrid Dolphin airfoils have shown a slight decrease in some aerodynamic characteristics compared to their NACA counterparts. This led to the conclusion that the semielliptical modification approach of the airfoil in its nose domain shows the best results within the 12–15% range of thicknesses, which is an important clue for further research of the hybrid Dolphin airfoils.

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Abbreviations

s(x):

Skeleton line

g(x):

Half-thickness distribution

ze(x):

Suction surface

zi(x):

Pressure surface

α:

Angle of attack

αcr:

Critical angle of attack

v:

Freestream velocity

CL:

Lift coefficient

CD:

Drag coefficient

CL/CD:

Lift-to-drag ratio

CLMAX:

Maximum lift coefficient

CDMIN:

Minimum drag coefficient

xζ:

Position of the maximum camber

xε:

Position of the maximum thickness

ε:

Half-thickness of the airfoil

ε1, ε2:

Half-thickness of the airfoil in points 1 and 2 (Fig. 2)

M:

Mach number

MRe:

Mega-Reynolds number, Re×106

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Author information

Authors and Affiliations

  1. University of Belgrade, Innovation Center, Faculty of Mechanical Engineering, Belgrade, Serbia

    Zorana Z. Dančuo, Ivan A. Kostić, Olivera P. Kostić, Aleksandar Č. Bengin & Goran S. Vorotović

Authors
  1. Zorana Z. Dančuo
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  2. Ivan A. Kostić
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  3. Olivera P. Kostić
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  4. Aleksandar Č. Bengin
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  5. Goran S. Vorotović
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Corresponding author

Correspondence to Zorana Z. Dančuo .

Editor information

Editors and Affiliations

  1. Faculty of Aeronautics and Astronautics, Eskisehir Technical University, Eskisehir, Türkiye

    T. Hikmet Karakoc

  2. Faculty of Mechanical Engineering, University of Belgrade, Belgrade, Serbia

    Ivan A. Kostić

  3. Faculty of Mechanical Engineering, University of Belgrade, Belgrade, Serbia

    Aleksandar Grbović

  4. Faculty of Mechanical Engineering, University of Belgrade, Belgrade, Serbia

    Jelena Svorcan

  5. School of Aviation, Süleyman Demirel University, Keciborlu, Isparta, Türkiye

    Alper Dalkiran

  6. Porsuk Vocational School, Eskisehir Technical University, Eskisehir, Türkiye

    Ali Haydar Ercan

  7. Faculty of Mechanical Engineering, University of Belgrade, Belgrade, Serbia

    Ognjen M. Peković

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Dančuo, Z.Z., Kostić, I.A., Kostić, O.P., Bengin, A.Č., Vorotović, G.S. (2024). Influence of Thickness Ratio on the Aerodynamic Characteristics of a Family of Hybrid Semielliptical Dolphin Airfoils. In: Karakoc, T.H., et al. Novel Techniques in Maintenance, Repair, and Overhaul. ISATECH 2022. Sustainable Aviation. Springer, Cham. https://doi.org/10.1007/978-3-031-42041-2_1

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  • DOI: https://doi.org/10.1007/978-3-031-42041-2_1

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-031-42040-5

  • Online ISBN: 978-3-031-42041-2

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