覆冰导线气动力特性风洞试验研究  

A wind tunnel study on aerodynamic characteristics of iced conductor

作　　者：王昕[1] 楼文娟[1] 沈国辉[1] 许福友[2] 

机构地区：[1]浙江大学结构工程研究所,浙江杭州310058 [2]大连理工大学建设工程学部,山东大连116024

出　　处：《空气动力学学报》2011年第5期573-579,共7页Acta Aerodynamica Sinica

基　　金：国家自然科学基金(51178424)

摘　　要：针对新月形和D形两种典型断面的特(超)高压大截面厚覆冰导线进行了气动力系数风洞测试,获取了0°～180°以5°攻角为间隔各攻角下的气动三分力系数,用均匀流和均匀湍流两种风场研究湍流对覆冰导线气动力特性的影响,根据Den Hartog理论分别计算了两种断面覆冰导线可能发生舞动的风攻角范围。结合以往试验结果,归纳了两类覆冰冰型气动力特征。试验结果表明:新月形覆冰导线可能发生Den Hartog舞动的攻角范围为15°～30°和175°～180°,D形覆冰导线则为65°～85°及135°～150°,湍流对导线舞动气动稳定性存在影响。与以往试验结果比较表明:本试验结果能够反映大覆冰新月形和D形覆冰导线气动力特征,小覆冰新月形导线气动力特性则与本试验存在较大差异。The aerodynamic coefficients of large size ultra high voltage transmission conductor with thick ice coating which has two typical section forms of crescent section and D section were obtained from 0°~ 180° by every 5° in the wind tunnel,uniformflow and homogeneous turbulence flow were both used in the test to investigate the influences of turbulence on the aerodynamic coefficients of iced conductor,the range of attack angle which galloping can occur was derived based on Den Hartog theory.The aerodynamic characteristic of the two typical iced section was summarized combined with earlier tests.The wind tunnel test shows： the crescent section iced conductor may gallop in the Den Hartog pattern when the attack angle lies in 15°~30° and 175°~180°,the corresponding range of D section iced conductor is 65°~85° and 135°~150°,and the turbulence in flow influence the stability of galloping obviously.Comparison of earlier tests indicates that： the aerodynamic characteristic of other tested thick crescent section iced conductor and D section iced conductor are similar with this test,but the aerodynamic characteristic of thin crescent section iced conductor has significant differences.

关 键 词：舞动 覆冰导线 风洞试验 气动力特性 

分 类 号：TU312.1[建筑科学—结构工程]