摘要
圆柱在转动时会形成非对称的流场,导致圆柱气动力发生改变,旋转圆柱的气动力在风力发电或航海领域有很广的应用前景,气动力特性的研究对这些应用有重要的意义。通过刚性模型测力风洞试验,对不同转速下旋转圆柱的气动力特性及其变化规律进行研究,总结得到转速比和升阻力系数的关系。结果表明:随着转速的提高,旋转圆柱的平均升力系数增加,平均阻力系数减小;在不同的转速比区间内平均升阻力系数的变化规律有所差异,转速提高时升力系数增加幅度有所变化,而阻力系数受到影响很小。
The aerodynamic force on circular cylinders changes because of the formation of asymmetric flow when the cylinder rotates.The effect of the rotation on aerodynamic force has wide application in wind power generation or navigation,and the characteristics of the aerodynamic force on a rotating circular cylinder significantly influence the development of these applications.In this study,the features of the aerodynamic force on a circular cylinder are illustrated to reveal the effect of the rotation ratio.The results show that an average lift coefficient increases with the increase of the rotation ratio.Meanwhile,the mean drag coefficient decreases when the rotation ratio increases.The variation of the lift coefficient with the rotation ratio differs from the drag coefficient.The lift coefficient changes more considerably than the drag coefficient.
作者
刘剑寒
马文勇
LIU Jian-han;MA Wen-yong(School of Civil Engineering,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;Innovation Center for Wind Engineering and Wind Energy Technology of Hebei Province,Shijiazhuang 050043,China;State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures,Shijiazhuang Tiedao University,Shijiazhuang 050043,China)
出处
《工程力学》
EI
CSCD
北大核心
2021年第S01期89-92,132,共5页
Engineering Mechanics
基金
河北省教育厅重点项目(ZD2018063)。
关键词
旋转圆柱
风洞试验
气动力特性
转速比
升阻力系数
rotating cylinder
wind tunnel test
aerodynamic characteristics
rotation ratio
lift and drag coefficient
