Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

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

DOI QR Code

Evaluation of Aerodynamic Characteristics of NREL Phase VI Rotor System Using 2-Way Fluid-Structure Coupled Analysis Based on Equivalent Stiffness Model

등가강성모델 기반의 양방향 유체구조 연성해석을 적용한 NREL Phase VI 풍력 로터 시스템의 공력특성 평가

  • Cha, Jin-Hyun (Dept. of Aerospace Engineering, Pusan Nat'l Univ.) ;
  • Song, Woo-Jin (Industrial Liaison Innovation Center, Pusan Nat'l Univ.) ;
  • Kang, Beom-Soo (Dept. of Aerospace Engineering, Pusan Nat'l Univ.) ;
  • Kim, Jeong (Dept. of Aerospace Engineering, Pusan Nat'l Univ.)
  • 차진현 (부산대학교 항공우주공학과) ;
  • 송우진 (부산대학교 부품소재산학협력연구소) ;
  • 강범수 (부산대학교 항공우주공학과) ;
  • 김정 (부산대학교 항공우주공학과)
  • Received : 2011.12.01
  • Accepted : 2012.04.23
  • Published : 2012.07.01
Download PDF
⟨ Previous Next ⟩

Abstract

In this study, the evaluation of the aerodynamic characteristics of the NREL Phase VI Rotor System has been performed, for the 7 m/s upwind case using commercial FEA and CFD tools which are ANSYS Mechanical 12.1 and CFX 12.1. The initial operating conditions of the rotor blade include a $3^{\circ}$ tip pitch angle. A numerical simulation was carried out on only the rotor parts, excluding the tower structure based on the equivalent stiffness model, to consider the aeroelastic effect for the numerical simulation using the loosely coupled 2-way fluid-structure interaction method. The blade root bending moment was monitored in real time to obtain reasonable results. To verify the analysis results, the numerical simulation results were compared with the measurements in the form of the root bending moment and the pressure distributions of the NREL/NASA Ames wind tunnel test.

본 논문은 상용 유한요소코드인 ANSYS Workbench 12.1과 CFX 12.1을 이용하여 NREL Phase VI Rotor에 대한 공력특성을 입구풍속 7m/s 경우에 대해 연구하였다. 공탄성 효과를 고려하기 위해 약결합 양방향 유체구조 연성기법을 사용하여 타워구조를 제외한 로터파트에 대해서 해석이 수행되었다. 블레이드 끝단의 초기 피치각은 $3^{\circ}$로 설정하였고, 구조해석모델은 등가강성기법을 적용하였다. 신뢰성 있는 수렴판정 결과의 확보를 위해 블레이드 루터부의 굽힘모멘트를 실시간으로 모니터링 하였다. 해석의 신뢰성을 검증하기 위하여 해석결과를 NREL/NASA Ames 풍동 실험결과와 비교 분석하였다.

Keywords

References

  1. Kim, B. S., Lee, K. S. and Kim, M. E., 2009, "Design of a 2MW Blade for Wind Turbine and Uni-Directional Fluid Structure Interaction Simulation," Trans of the KSME(B), Vol. 33, No. 12, pp. 1007-1013.
  2. Kim, B. S., Kim, M. E. and Lee, Y. H., 2008, "Predicting the Aerodynamic Characteristics of 2D Airfoil and the Performance of 3D Wind Turbine using a CFD Code," Trans of the KSME(B), Vol. 32, No. 7, pp. 549-557.
  3. Mo, J. H. and Lee, Y. H., 2009, "A Numerical Study on the Aerodynamic Characteristics for a HAWT of NREL Phase VI," Trans. of the KOSME, Vol. 33, No. 6, pp. 886-895. https://doi.org/10.1111/j.1537-2995.1993.tb05135.x
  4. Hand, M. M., Simms, L. J., Jager, D. W., Cotrell, J. R., Schreck, S. and Larwood, S.M., 2001, "Unsteady Aerodynamics Experiment Phase VI: Wind Tunnel Test Configurations and Available Data Campaigns," NREL/TP-500-29955.
  5. Simms, D., Schreck, S., Hand, M. and Fingersh, L. J., 2001, "NREL Unsteady Aerodynamics Experiment in the NASA-Ames Wind Tunnel: A Comparison of Prediction to Measurements," NREL/TP-500-29494.
  6. Jaiman, R. K., Jiao, X., Geubelle, P. H. and Loth, E., 2005, "Assessment of Conservative Load Transfer Fluid-Solid Interface with Non-Matching Meshes," Int. Jour. Numer. Meth. Engng, Vol. 64, pp. 2014-2038. https://doi.org/10.1002/nme.1434
  7. Kim, D. H., Park, H. G. and Kim, D. M., 2008, "Improved Equivalent Beam Element Modeling Technique for Large Scale Wind-Turbine Composite Blade," Jour. of the KFMA, Vol. 11, No. 4, pp. 32-37. https://doi.org/10.5293/KFMA.2008.11.4.032
  8. Kim, B. S., Eum, H. J., Won, J. B., Kim, M. E. and Lee, Y. H., 2008, "Performance Analysis of the NREL Phase IV Wind Turbine by CFD," Trans. of the KSAS, Vol. 36, No. 4, pp. 315-320.
  9. Sorensen, N. N. and Michelsen, J. A., 2002, "Navier-Stokes Predictions of the NREL Phase VI Rotor in the NASA Ames $80\;ft{\times}120\;ft$ Wind" Wind Energ., Vol. 5, pp. 151-169. https://doi.org/10.1002/we.64

Cited by

  1. Study on Application of Equivalent Stiffness Modeling Method for Static Aeroelastic Analysis of Large Scale Wind Turbine Rotor System vol.29, pp.11, 2012, https://doi.org/10.7736/KSPE.2012.29.11.1236