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Fluid-Oscillation Coupled Analysis for HAWT Rotor Blade (One Degree of Freedom Weak Coupling Analysis with Hinge-Spring Model)

Imamura, Hiroshi    (Wind Energy Institute Co., Ltd   ); Hasegawa, Yutaka    (EcoTopia Science Institute, Nagoya University   ); Murata, Junsuke    (Department of Mechanical Science and Engineering, Nagoya University   ); Chihara, Sho    (Nissan Motor Co., Ltd.   ); Takezaki, Daisuke    (Nissan Motor Co., Ltd.   ); Kamiya, Naotsugu    (Department of Mechanical Science and Engineering, Nagoya University  );
  • 초록

    Since large-scale commercial wind turbine generator systems such as MW-class wind turbines are becoming widely operated, the vibration and distortion of the blade are becoming larger and larger. Therefore the soft structure design instead of the solid-design is one of the important concepts to reduce the structural load and the cost of the wind turbine rotors. The objectives of the study are development of the fluid-structure coupled analysis code and evaluation of soft rotor-blade design to reduce the unsteady structural blade load. In this paper, fluid-structure coupled analysis for the HAWT rotor blade is performed by free wake panel method coupled with hinge-spring blade model for the flapwise blade motion. In the model, the continuous deflection of the rotor blade is represented by flapping angle of the hinge with one degree of freedom. The calculation results are evaluated by comparison with the database of the NREL unsteady aerodynamic experiment. In the analysis the unsteady flapwise moments in yawed inflow conditions are compared for the blades with different flapwise eigen frequencies.


  • 주제어

    Wind Turbine .   Free Wake Panel Method .   Weak Coupling Analysis .   Hinge-Spring Model .   Yawed Inflow.  

  • 참고문헌 (16)

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    3. Guinta, A. A., 1997, “Aircraft Multidisciplinary Design Optimization Using Design of Experimental Theory and Response Surface Modeling Methods,” Ph. D. Thesis, Department of Aerospace Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA. 
    4. Bossanyi, E.A., Bladed for Windows - Theory Manual, Garrad Hassan & Patners Limited, Bristol, England, Document No. 282/BR/009. Issue No. 3, 1997, p. 54. 
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    8. Bierbooms, W. A. A.M., A Comparison between Unsteady Aerodynamic Model, Proc. European Wind Energy Conference, Amsterdam, 1991, pp. 13-17. 
    9. Imamura, H., Takezaki, D., Hasegawa, Y., et al, Study on Unsteady Flow around a HAWT Rotor by Panel Method (Calculation of Yawed Inflow Effects and Evaluation of Angle of Attack in the Three-Dimensional Flow Field), JSME, 71-701(B), 2005, pp. 154-161. 
    10. Leishman, J.G., Challenge in Modeling the Unsteady Aerodynamics of Wind Turbines, AIAA2002-0037, 2002. 
    11. Matsumiya, H., Kawamura, S. and Tanaka, H., Design and Behaviour Analysis of a Mechanical Governor for a Variable-Speed Wind Turbine Generator, JSME, 56-529(C), 1990, pp. 2373-2377. 
    12. Shimizu, Y., Kamada, Y. and Tobinaga, I., Studies on Horizontal Axis Wind Turbine with Passive Teetered Brake and Damper Mechanism : (Relationship between Braking Effect of Rotor Blade and Flow Patterns around Rotor), JSME, 65-633(B), 1999, pp. 1696-1702. 
    13. Hand, M.M., Simms, D.A., et al., Unsteady Aerodynamics Experiment Phase VI: Wind Tunnel Test Configurations and Available Data Campaigns, NREL/TP-500-29955, 2001. 
    14. Simms, D.A., Hand, M.M., Fingersh, L.J. and Jager, D.W., Unsteady Aerodynamics Experiment Phases II-IV. Test. Configurations. and Available Data. Campaigns, NREL/TP-500-25950, 1999. 
    15. Burton, T., Sharpe, D., et al., Wind Energy Handbook, John Wiley & Sons Ltd., 2001, pp. 262-264 
    16. G.A.M. van Kuik, R.P.J.O.M van Rooij and Hiroshi Imamura, Analysis of the UAE Phase VI Wind Tunnel Results in the Non-Yawed Flow, 2004 European Wind Energy Conference and Exhibition, Nov. 22-26, 2004, London, pp. 1-11. 

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