水平轴风力机的推力型工作原理

STUDY OF A PROPULSION OPERATING PRINCIPLE IN HORIZONTAL-AXIS WIND TURBINES

在水平轴风力机升力型工作原理的基础上提出一种新的推力型工作原理,提供一项显著提高风力机风能利用系数的桨尖喷气技术,即充分利用传统升力型风力机风轮旋转离心力在除去整流罩的空心轮毂内产生的低压,将轮毂前方的气体吸入,并通过中空的桨叶,再从桨尖处预先设置的切向孔中与旋转方向反向喷出,从而产生推动风轮旋转的“辅助”转矩,并使发电量和风能利用系数大大提高。大量的风洞对比实验证明,桨尖喷气技术可以提高风力机输出功率30%以上。

A propulsion operating principle was put forward based on the lift operating principle, which introduces a blade-tip jet technique that can enhance the power coefficient of wind turbines significantly, i.e. a jet technique employed at the tip of the blade, on which the air in front of the hub of the wind turbine is inhaled into the holed blades by the low pressure produced by its centrifugal force, then the jets in the blade-tips are formed and exhausted at a high velocity in an opposite direction to the rotating direction, thus produce an auxiliary aerodynamic moment, which speeds up the wind turbine and increases the output power of the wind turbine remarkably. A number of comparative experiments for a prototype and a counterpart of the wind turbines showed that the rate of increase in the power or power coefficient is up to 30% due to the blade-tip jets.