空气动力学学报2011，Vol.29Issue(5)：573-579,7.
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
摘要
Abstract
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Key words
galloping/iced conductor/wind tunnel test/aerodynamic characteristic分类
建筑与水利引用本文复制引用
王昕,楼文娟,沈国辉,许福友..覆冰导线气动力特性风洞试验研究[J].空气动力学学报,2011,29(5):573-579,7.基金项目
国家自然科学基金(51178424) （51178424）
