摘要
对风力机叶片的NACA4424翼型附加了被动喷气襟翼,研究其提高风力机功率系数Cp的可能性。在翼型(NACA4424)压力面95%弦长处开缝,使得气体以与弦线成45°的角度向后喷出,模拟Gurney襟翼的作用。通过对有、无喷气襟翼的风力机模型进行风洞对比实验,表明被动喷气襟翼显著提高了风力机的性能。这说明对于实际有扭曲叶片的风力机,在尖、中、根部采用被动喷气襟翼提高其性能是一项有很好应用前景的新技术。
Passive air jet flaps （PAJFs） are applied to NACA4424 airfoil of wind turbine blade in this paper to investigate their capabilities of enhancing the power coefficient Cp of wind turbines. Slots have been not- ched at 95% of blade chord length on the pressure surface of NACA4424 airfoil so that jets from the slots exhaust rearward at an angle of 45 ° to the blade chord to simulate Gurney flap effect. Comparative experi- mental results of models with and without PAJFs in the wind tunnel show that PAJFs significantly increase wind turbine performance. Furthermore, it shows that, for actual wind turbines with twisted blades, this is a promising novel method to apply PAJFs to the mean and/or hub of wind turbine blades to enhance their performances.
出处
《沈阳航空航天大学学报》
2012年第5期6-9,共4页
Journal of Shenyang Aerospace University
基金
辽宁省自然科学基金(项目编号:20102177)
