风力机叶片前缘表面附着物对气动性能的影响研究  

EFFECT OF ATTACHMENT OF BLADE SURFACE ON WIND TURBINE

作　　者：李长仁[1] 李国文[1] 陈薇[1] 

机构地区：[1]沈阳航空航天大学,沈阳110136

出　　处：《太阳能学报》2012年第4期540-544,共5页Acta Energiae Solaris Sinica

摘　　要：主要研究了风力机叶片表面附着物对其气动性能的影响。实验采用粘土作为附着物模拟叶片表面前缘结冰及结垢,模拟有附着物后叶片周围流场的变化、叶片升力及阻力系数的变化,并与原叶片的气动性能进行对比。比较分析了不同攻角下叶片外部压力分布的变化规律,计算分析了外部压力分布对表面附着物力学特性影响规律。该文实验攻角为-4°～24°,温度为250.37K。分别对比了叶片附着物的厚度和长度对叶片性能的影响,通过对比升力及阻力特性,发现与原叶片相比,附着物叶片的升力系数普遍减少,并随附着物长度和厚度的增加,升力系数降低得更剧烈。附着物是造成叶片气动性能恶化的主要原因。The influence of the attachment of blade surface on aerodynamics performance of wind turbine was studied. The condition of icing and dirty on the leading edge of blade surface was simulated by clay, and performance of aerofoil was measured by wind tunnel tests to compare the correspondent aerodynamic performance variation be- fore and after icing. Under different attack angle conditions, the variation of pressure distribution along icing on airfoil was analyzed. The effect of pressure distribution on characteristic mechanics of icing on airfoil was investigated. The parameters used herein is： AOA = -4° -24°, T = 250.37K, The ice profile was round ice which was adopted in the wind tunnel tests. The results indicate that the ice accretion leads to loss of lift coefficient. The attachment is the main reason for all these aerodynamic performances worsen.

关 键 词：叶片 附着物 风洞实验 升力系数 压力分布 

分 类 号：TM614[电气工程—电力系统及自动化]