叶尖小翼的离心力和气动力对风轮动频特性的影响研究  

INVESTIGATION OF THE INFLUENCE ON THE DYNAMIC FREQUENCY CHARACTERISTIC OF WIND TURBINE BY CENTRIFUGAL FORCE AND AERODYNAMIC FORCE OF TIP VANE

作　　者：汪建文[1] 赵志渊[1] 刘博[1,2] 

机构地区：[1]内蒙古工业大学能动学院,呼和浩特010051 [2]中国农业机械化科学研究院呼和浩特分院,呼和浩特010010

出　　处：《太阳能学报》2009年第9期1301-1306,共6页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(NO.50566001);内蒙古自治区2007年人才开发基金项目

摘　　要：通过对风力机叶尖处安装不同尺寸不同质量小翼的风轮和安装具有与小翼质量相同但不同纯质量块的风轮分别进行风轮的动频特性实验,结果表明:小翼的气动特性不仅仅调整了风轮动频曲线的走势,而且小翼设计的好可以使得风轮推迟或避开共振区;当风轮转速较高时,安装合适的小翼后,风轮一阶反对称的动态固有频率均能提高,而且气动特性的影响要大于质量的影响;当风轮转速较低时,安装小翼后的风轮,一阶反对称的动态固有频率不会提高还有可能下降,叶尖质量增加表现为使动态固有频率下降,气动力表现为使动态固有频率提高,而且小翼的质量成分的影响要大于或等于小翼的气动特性的影响;安装小翼后的风轮,在低转速时,会使动频下降,而且它对高阶振型的影响比对低阶振型的影响大。The dynamic frequency of wind turbine was tested under two conditions. The result indicated that aerodynamic force characteristic of tip vane adjusts the walking up of dynamic frequency eurvilinear of the wind turbine; furthermore, the resonate of wind turbine will be delayed or avoided if a tip vane is well designed. In the higher rotate speed, it increases the first order unsympathetic dynamic natural frequency of wind turbine, and the influence of aerodynamic force characteristic is greater than that of mass. In the lower rotate speed, it doesn＇t increase and even decreases the first order unsympathetic dynamic frequency of wind turbine after adding tip vane to blade of HAWT. The influence of mass of tip vane is greater than or equal to that of aerodynamic force of tip vane. In the low rotate speed, it decreases dynamic fiequency to add tip vane to blade of wind turbine, and the influence of high-level mode is larger than that of low-level mode for adding the tip vance.

关 键 词：风力机 叶尖小翼 动频特性 离心力 气动力 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]