Transactions of the KSME C: Technology and Education (대한기계학회논문집 C: 기술과 교육)

The Korean Society of Mechanical Engineers (대한기계학회)
권호 표지
DOI QR코드

DOI QR Code

Numerical Analysis of Aerodynamics Characteristics of Two Dimensional Airfoil Section with Elastic Flap

탄성 플랩을 갖는 2차원 날개 단면 공력 특성 전산해석

  • Won, Chang-Hee (School of Civil Engineering, Chungbuk Nat'l Univ.) ;
  • Lee, Joo-Yong (Graduate School of Civil System Engineering, Chungbuk Nat'l Univ.) ;
  • Lee, Sungsu (School of Civil Engineering, Chungbuk Nat'l Univ.)
  • 원창희 (충북대학교 토목공학과) ;
  • 이주용 (충북대학교 토목시스템 공학 대학원) ;
  • 이승수 (충북대학교 토목공학과)
  • Received : 2014.02.07
  • Accepted : 2014.03.26
  • Published : 2014.03.01
Download PDF
⟨ Previous Next ⟩

Abstract

This study presents computational analysis of aerodynamic characteristics of two-dimensional airfoil sections with elastic flap attached at the trailing edge. EDISON_CFD was utilized to simulate the incompressible turbulent flow around the foil and MIDAS_IT was employed to estimate the deflection of the flap under the pressure loading. Using iterative procedure, the terminal deflection was estimated and the resulting lift-drag ratio indicates that the favorable effect of the flap is expected within certain amount of angle of attack.

이 연구에서는 탄성 플랩이 뒷전에 장착된 2차원 날개 단면의 공력 특성을 전산 해석하였다. EDISON_CFD는 날개 주위의 비압축성 난류 유동을 시뮬레이션 하기 위해 이용되었으며, MIDAS_IT는 전산 해석 결과로 얻어진 압력 하중 하에서 탄성 플랩의 변위를 구조해석 하기 위해 사용되었다. EDISON_CFD와 MIDAS_IT의 반복 계산 절차를 이용하여, 플랩의 변위가 수렴되면 해석을 종료하여, 날개 단면에 작용하는 공력을 분석하였다. 양항비의 추정 결과 일정 받음각 이내에서 플랩의 유리한 효과가 나타날 것으로 예상된다.

Keywords

References

  1. Hong, C. H. and Seo, S. Ho., 2011, "Numerical Analysis on Performance Improvement for Wind Blade by the Groove," Journal of the Korean Society of Marine Engineering, Vol. 35, No. 4, pp. 475-482. https://doi.org/10.5916/jkosme.2011.35.4.475
  2. Lee, K, B., Lee, S, U., Lee, C, H., Choi, J, I., Lee, D, H. and Kim, C, A., 2011, "EDISON_CFD : Development of e-Science-Based Simulation Software and Contents for Education and Research in Fluid Engineering," Trans. Korean Soc. Mech. Eng. 2011. 11, pp. 2024-2028.
  3. Cho, K, W., Kim C. and A., Kim, B, S,, 2012, "계산과학공학 기술을 이용한 열.유체 교육 서비스 (EDISON)," Journal of The Korean Society for Aeronautical & Space Sciences, Vol. 6, No 2, pp. 49-58.
  4. Cho, J, W., Nam, D, U., Jin, D, S., Ahn, B, Y., Park, S, R., Lee, J, S. and Kim, C, A., 2012, "Development and Implementation of Simulation based Higher Education. Research Environment," Trans. Korean Soc. Mech. Eng. 2012. 11, pp. 1382-1387.
  5. Sheldahl, R. E. and klimas, P. C, 1998, "Aerodynamic Characteristics of Seven Symmetrical Airfoil Sections Through 180-Degree Angle of Attack for Use in Aerodynamic Analysis of Verical Axis Wind Turbines," SAND80-2114, pp.3-112.
  6. Cho, W. S., Kim, H. S. and Choi, Y. D., 2013, "Shape Design and Flow Analysis on a 200W-Class Gyromill Type Vertical Axis Wind Turbine Rotor Blade," Journal of the Korean Society of Marine Engineering, Vol. 37, No. 2, pp. 170-177. https://doi.org/10.5916/jkosme.2013.37.2.170
  7. Sun, M. Y., Kim, D. Y. and Lim, J. K., 2012, "Study on Optimal Design of Wind Turbine Blade Airfoiland Its Application," Trans. Korean Soc. Mech. Eng.(B), Vol. 36, No. 5, pp. 465-475. https://doi.org/10.3795/KSME-B.2012.36.5.465
  8. Sicot, C., Devinant, P., Loyer, S. and Hureau, J., 2008, "Rotational and Turbulence Effects on a Wind Turbine Blade. Investigation of the Stall Mechanisms," Journal of Wind Engineering and Industrial Aerodynamics, Vol. 96, Issues 8-9, pp. 1320-1331. https://doi.org/10.1016/j.jweia.2008.01.013
  9. Ji, S. W., Park, S. K. and Kim, T. S., 2010, "A Numerical Study on the Effect of Mountainous Terrain and Turbine Arrangement on the Performance of Wind Power Generation," Trans. Korean Soc. Mech. Eng.(B), Vol. 34 No. 10, pp. 907-916. https://doi.org/10.3795/KSME-B.2010.34.10.907
  10. Jang, Y, J., Lee, J, H. and Kang, K, W., 2012, "Structural Integrity of Small Wind Turbine Composite Blade Using Structural Test and Finite Element Analysis," Trans. Korean Soc. Mech. Eng.(A), Vol. 36, No. 9, pp. 1087-1094. https://doi.org/10.3795/KSME-A.2012.36.9.1087
  11. Lee, S, J., Jeong, E, C. and Lim, H, C., 2012, "Numerical Study on Aerodynamic Characteristics of NACA0015," Journal of the Wind Engineering Institute of Korea, Vol. 16, No.4, PP. 143-148.
  12. Yoo, N, S. and Lee, J, H., 2000, "Effect of Airfoil Thickness on the Optimum Gurney Flap Height," Trans. Korean Soc. Mech. Eng 2000, Vol. 2, No. 2, pp. 568-572.
  13. So, K, S., Choi, C, W., Lee, D, C. and Kang, k, W., 2013, "Structural Optimization for Hybrid Vertical-Axis Wind Turbine Blade Using Response Surface Method," Trans. Korean Soc. Mech. Eng.(A), Vol. 37, No. 11, pp. 1331-1337. https://doi.org/10.3795/KSME-A.2013.37.11.1331
  14. Kim, J, H., Kim, J, B. and Oh, Y, L., 2013, "Performance Prediction of Wind Power Turbine by CFD Analysis," Trans. Korean Soc. Mech. Eng.(B), Vol. 37, No. 4, pp. 423-429. https://doi.org/10.3795/KSME-B.2013.37.4.423