Effect of Step Depth and Angle in Kline-Fogleman (KFm-2) Airfoil

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Fadi Mishriky
Fadi Mishriky
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Paul Walsh
Paul Walsh
α Toronto Metropolitan University Toronto Metropolitan University

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Effect of Step Depth and Angle in Kline-Fogleman (KFm-2) Airfoil

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Abstract

Recent years have witnessed extensive research efforts that aim at improving the aerodynamic performance of aircraft. while most of the efforts are drawn towards high-lift systems, simple and innovative designs like Gurney flaps, trapped vortex cavities and backwardfacing steps can have a significant effect on enhancing the aerodynamic properties of airfoils. One of those simple ideas is the Kline-Fogleman modified airfoil (KFm-2), which is basically an airfoil with a backward-facing step on the upper surface located at midway the chord length. it is claimed that the step creates a low pressure recirculation region on the suction side of the airfoil that may enhance the lifting force. This study will numerically examine the ability of the KFm-2 design to enhance the lift and drag properties of a NACA 2412 at a high Reynolds number of 5.9 × 10 6 . The effect of the step depth and the step angle will be thoroughly examined.

References

10 Cites in Article
  1. R Wlezien,G Homer,A Mcgowan,S Padula,M Scott,R Silcox,J Simpson (1998). The Aircraft Morphing Program.
  2. R Kline,F (1972). Unknown Title.
  3. R Kline,F Fogleman (1977). U.S. Patent and Trademark Office-Patent Information.
  4. D Fertis,L Smith (1986). Unknown Title.
  5. Demeter Fertis (1994). New Airfoil‐Design Concept with Improved Aerodynamic Characteristics.
  6. Fathi Finaish,Stephen Witherspoon (1998). Aerodynamic Performance of an Airfoil with Step-Induced Vortex for Lift Augmentation.
  7. M Cox,V Avakian,B Huynh (2014). Performance of a Stepped Airfoil at Low Reynolds Numbers.
  8. R Langtry,F Menter (2009). Correlationbased transition modeling for unstructured parallelized computational fluid dynamics codes.
  9. F Menter,R Langtry,S Völker (2006). Transition modelling for general purpose CFD codes.
  10. W Shyy,M Garbey,A Appukuttan,J Wu (2002). EVALUATION OF RICHARDSON EXTRAPOLATION IN COMPUTATIONAL FLUID DYNAMICS.

Funding

No external funding was declared for this work.

Conflict of Interest

The authors declare no conflict of interest.

Ethical Approval

No ethics committee approval was required for this article type.

Data Availability

Not applicable for this article.

How to Cite This Article

Fadi Mishriky. 2016. \u201cEffect of Step Depth and Angle in Kline-Fogleman (KFm-2) Airfoil\u201d. Global Journal of Research in Engineering - J: General Engineering GJRE-J Volume 16 (GJRE Volume 16 Issue J4): .

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Journal Specifications

Crossref Journal DOI 10.17406/gjre

Print ISSN 0975-5861

e-ISSN 2249-4596

Keywords
Classification
GJRE-J Classification: FOR Code: 090199
Version of record

v1.2

Issue date

November 6, 2016

Language
en
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Published Article

Recent years have witnessed extensive research efforts that aim at improving the aerodynamic performance of aircraft. while most of the efforts are drawn towards high-lift systems, simple and innovative designs like Gurney flaps, trapped vortex cavities and backwardfacing steps can have a significant effect on enhancing the aerodynamic properties of airfoils. One of those simple ideas is the Kline-Fogleman modified airfoil (KFm-2), which is basically an airfoil with a backward-facing step on the upper surface located at midway the chord length. it is claimed that the step creates a low pressure recirculation region on the suction side of the airfoil that may enhance the lifting force. This study will numerically examine the ability of the KFm-2 design to enhance the lift and drag properties of a NACA 2412 at a high Reynolds number of 5.9 × 10 6 . The effect of the step depth and the step angle will be thoroughly examined.

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Effect of Step Depth and Angle in Kline-Fogleman (KFm-2) Airfoil

Fadi Mishriky
Fadi Mishriky Toronto Metropolitan University
Paul Walsh
Paul Walsh

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