風洞実験による水平軸風車翼周りの流れに関する研究 : 第2報,翼面圧力分布による流れ状態の検討(流体工学,流体機械)

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This paper describes the results of the surface pressure measurements on a wind turbine rotor and the velocity measurements around the rotating blade. The experiments are carried out in a wind tunnel with a 2.4m diameter three-bladed wind turbine. The pressure taps are set at 31 positions in each of four test sections. Four radial sections at r/R=0.3, 0.5, 0.7 and 0.85 are selected for the measurements. The pressure distributions are measured for both rotating and non-rotating situation. These pressure distributions are compared and used for detecting the angle of attack for the rotating blade. The pressure distribution at r/R>0.7 shows the good agreements between rotating and non-rotating situation. The pressure distribution for the inner part of r/R<0.5 shows the stall delay. Also, by using the angle of attack estimated from the pressure distribution and the velocity distribution, the representative point for the relative velocity to the blade section is discussed. The angle of attack is compared with the designed value by the blade elements momentum theory.
一般社団法人日本機械学会の論文
2005-05-25