负压式风力机气动特性试验研究OA

To address the issue of low wind energy utilization in small wind turbines,a negative pres-sure wind turbine model was designed based on the principles of energy concentration and negative pressure power enhancement.Wind tunnel experiments were conducted to investigate the aerodynamic characteristics and power output properties of the negative pressure wind turbine.The experimental re-sults show that the power output growth rate of the negative pressure wind turbine is 133.51%at a wind speed of 7.5 m／s,and decreases to 20.39%at a wind speed of 12.5 m／s,demonstrating an overall trend of decreasing growth rate with increasing wind speed.At a constant wind speed,the closer the negative pressure hole is to the wall surface,the lower the power output.The average output power of the closed upper part of the negative pressure holes is 92.67%of that of the closed lower part.Moreo-ver,the larger the area of the negative pressure holes,the greater the power output of the wind turbine.The average power output when the negative pressure hole opening is 1／3 of the full opening is 30.27%of the full-open condition,and the average output power when the negative pressure hole opening is 1／2 of the full opening is 57.09%of the full-open condition.These conclusions can provide a valuable reference for research on improving wind turbine performance using the principle of negative pressure power enhancement.