【摘要】 采用多参考系模型方法对有无小翼水平轴风力机的三维流场进行数值研究。通过速度分析、压力分析及叶尖涡分析,得到:小翼消弱了叶尖涡的强度,推迟了叶尖涡产生的时间,使叶尖流动损失降低;有小翼叶片的下表面平均压力值比无小翼压力值(108Pa)增大了3.5%,且范围变宽;有小翼叶片的上表面平均压力值比无小翼压力值(-173Pa)降低了2.1%,因此有小翼叶片上下表面平均压力差比无小翼平均压力差(281Pa)增大了2.6%,扭矩增大,风力机输出功率增加。更多还原

【Abstract】 A numerical simulation was carried out by MRF on the three-dimensional flow field of the horizontal axis wind turbine(HAWT) with and without tip vane.This paper studied the velocity,pressure and tip vortices.The tip vane weakened the strength of tip vortices,postponed the time of producing tip vortices and reduced the loss of the tip.As the role of the tip vane,the average pressure of below surface is lager 3.5%than 108Pa that is the number without the tip vane.Besides,the scope is broader.The average pressure of upper surface is smaller 2.1%than-173Pa with tip vane.The difference of the pressure is lager 2.6% than 281Pa with tip vane.So the torque and the power of wind turbine increased.更多还原