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, and experimentally by the use of a subscale model. 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 characteristics of the NACA44xx aerofoil blade's HAWT for the different types of the blades such as, blade dia. D, coard length 1, twist pitch angle θ, are discussed by reference to the power, torque and thrust coefficient, C_p, C_q, C_T, and the tip speed ratio λ from the point of view of the optimum design and controlling.

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周囲の構造物に比べて高い位置に露出して建設される小型風力発電システムが, 配電系統に柱上変圧器を介して連系される場合がある。本論文では, 小型風力発電システム雷撃時に柱上変圧器の低圧側から進入する雷サージが, その周囲に発生する過電圧にどのような影響を与えるのかを実験的に検証したので報告する。

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近年風車はますます大型化の傾向にあり (図1), これに伴う風車の重量増加, 信頼性向上のためには積極的な荷重の低減が必要となる. 今回は風車構成要素のうち, ナセル支持構造物であるタワーに着目し, これに作用する疲労荷重 (変動荷重) を低減するためアクティブ制振 (ActiveVibration Control) 技術を開発した. 疲労荷重の低減効果を検証するため, 数値実験のみでなく実証試験も行った. 実証試験ではAVCの信頼性検証も行った. 本紙ではAVCの概念とその効果について述べる.

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This research is aiming to create new method to design new wind farms. To estimate wind flow over Tokyo bay area, MM5 model was used to simulate wind flow around Tokyo bay area up to resolution of 1km. Landscape visual simulation was done. The result from wind simulation was taken into the simulation. The simulation applied Mixed Reality to visualize the wind farm. Also, for more convenient visualization of wind farm, 3D CG rendering software was used. The visual simulation has made understanding the landscape easier.

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