Journal of the Korean Society for Aeronautical & Space Sciences (한국항공우주학회지)

The Korean Society for Aeronautical and Space Sciences (한국항공우주학회)
권호 표지
DOI QR코드

DOI QR Code

Numerical Investigation on Aerodynamic Characteristics of Kline-Fogleman Airfoil at Low Reynolds Numbers

Kline-Fogleman Airfoil의 저 레이놀즈수 공력특성 연구

  • Roh, Nahyeon (Department of Aerospace Engineering, Pusan National University) ;
  • Son, Chankyu (Department of Aerospace Engineering, Pusan National University) ;
  • Yee, Kwanjung (Department of Aerospace Engineering, Pusan National University)
  • Received : 2013.08.23
  • Accepted : 2014.01.31
  • Published : 2014.02.01
Download PDF
⟨ Previous Next ⟩

Abstract

In this study, aerodynamic characteristics of Kline-Fogleman airfoils are numerically investigatied which has been widely used in remote control aircraft operating at low Reynolds numbers. The comparison of aerodynamic characteristics was conducted between NACA4415 and Kline-Fogleman airfoil based on NACA4415. ANSYS Fluent was employed with the incompressible assumption and $k-{\omega}$ SST turbulence model. It was found that lift coefficient was significantly enhanced in the range of Reynolds number from $3{\times}10^3$ to $3{\times}10^6$. Especially in the region of Reynolds number below $2.4{\times}10^5$, the lift-to-drag-ratio was improved by 26% using the Kline-Folgeman airfoil compared with NACA4415 airfoil.

본 연구에서는 원격 조종 소형 비행기에서 주로 사용되고 있는 Kline-Fogleman 익형의 저 레이놀즈수 공력 특성을 분석하는 연구를 수행하였다. NACA4415와 이를 기반으로 한 Kline-Fogleman 익형의 공력특성을 비교하였다. 본 연구는 ANSYS Fluent를 활용하였으며, 유동은 비압축성으로 가정하고, 난류모델 $k-{\omega}$ SST를 사용하였다. 이를 통하여 Kline-Fogleman 익형의 공기역학적 원리를 규명하였으며 계산된 레이놀즈수 $3{\times}10^3{\sim}3{\times}10^6$ 범위에서 Kline-Fogleman 익형이 NACA4415에 비해 양력계수가 향상됨을 확인하였다. 특히 레이놀즈수 $2.4{\times}10^5$이하의 영역에서는 Kline-Fogleman 익형의 양항비가 NACA4415에 비해 26%까지 향상되었다.

Keywords

References

  1. Ahn, J., "Status and Prospect of MAVs," J. of the Korean Society for Aeronautical & Space Sciences, Vol. 28, No. 7, 2000, pp. 145-159.
  2. Eastman N. J., and Albert S., "Airfoil Section Characteristics as Affected by Variations of the Reynolds Number," National Advisory Committee for Aeronautics, No. 586, pp. 227-267.
  3. Kim, J. H., and Ahn, J., "A Computational Study on the Design of Airfoils for a Fixed Wing MAV(Micro Aerial Vehicle) and the Aerodynamic Characteristic of the Vehicle," J. of the Korean Society for Aeronautical & Space Sciences, Vol. 39, No. 4, 2000, pp. 107-112.
  4. Thomas J. M., "Fixed and Flapping Wing Aerodynamics For Micro Air Vehicle Application," AIAA, 2001
  5. Fathi F., and stephen W., "Aerodynamic Performance of an Airfoil with Step-Induced Vortex for Lift Augmentation," J. of Aerospace Engineering, Vol. 11, No. 1, 1998, pp. 9-16. https://doi.org/10.1061/(ASCE)0893-1321(1998)11:1(9)
  6. Ranganadhan V., "Enhancing the Aerodynamic Performance of Stepped Airfoils," MS thesis, Missouri University of Science and Technology, 2012, pp. 1-78.
  7. Kim, T. W., "The Development a GUI Environment Automatic Program for Rotor Blade Airfoil Performance Analysis", MS thesis, Pusan National University, 2009
  8. Menter, F. R., "Two-Equation Eddy-Viscosity Turbulence Models for Engineering Applications," AIAA , Vol. 32, No. 8, 1994, pp. 1598-1605. https://doi.org/10.2514/3.12149
  9. Ira, H. A., and Albert C. Von D., "Theory of Wing Sections," Dover, NewYork, 1958, pp. 490-491.
  10. http://www.pointwise.com/gridgen/
  11. Choi, Y. D., and Lee, Y. H., "A Study on Flow Characteristics of Two-Dimensional Backward-Facing Step by CFD," Conference of Korean Society for Computational Fluids Engineering, Nov, 1998, pp. 127-132.
  12. So, R. M. C., and Lai, Y. G., "Low Reynolds Number Modelling of Flows over a Backward Facing Step," J. of Applied Mathmatics and Physics, Vol. 39, No. 1, 1998, pp. 13-27.
  13. Wang, J. J., Li, Y. C., and Choi, K., "Gurney Flap—Lift Enhancement, Mechanisms and Applications," Progress in Aerospace Sciences, Vol. 44, No. 1, 2008, pp. 22-47. https://doi.org/10.1016/j.paerosci.2007.10.001