プロペラ型風力タービンの理論的な研究 : NACA翼型ブレードに対しエネルギ翼素複合理論を適用した場合

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  • Theoretical Study on Aerodynamic Characteristics of Horizontal Axis Wind Turbine : Application of Energy・Momentum-Blade Element Combined Theory to NACA 44xx Aerofoil Blade

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The Aerodynamic performance characteristics of a horizontal axis wind turbine (HAWT) using by NACA44xx aerofoil series as known the detail date of C_L C_D were investigated theoretically by an analysis involving a combination of momentum, energy, and blade element theory by means of the strip element method. In this study, two approaches involving combination analysis are made use of, namely, the thrust-torque and thrust-energy methods. Although both approaches yield identical results, the latter is superior for evaluating the relationship of the kinetic energy of the flows on blades. The theoretical characteristics of the HAWT using the different types of the blades such as, blade dia., coard length, twist pitch angle, are discussed by reference to the power torque and thrust coefficient, C_p, C_q, C_T, C_<th>, and the tip speed ratio λ from the point of view of the optimum design and controlling.

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