典型覆冰导线气动绕流计算及动态特性分析  

Simulation and analysis on aerodynamic characteristics of iced-conductors in typical shapes

作　　者：肖良成[1] 李新民[2] 江俊[1] 卢军[1] 

机构地区：[1]西安交通大学机械结构强度与振动国家重点实验室,西安710049 [2]中国电力科学研究院,北京102401

出　　处：《中国科学：物理学、力学、天文学》2013年第4期500-510,共11页Scientia Sinica Physica,Mechanica & Astronomica

基　　金：国家自然科学基金资助项目(批准号:50908218)

摘　　要：本文首先运用ADINA有限元软件的流固耦合模块针对新月形、翼形、扇形和D形四种典型覆冰导线冰形的气动力特性进行了模拟计算.得到了四种典型冰形在不同冰厚,来流风速下的扭转、升力以及阻力系数曲线.然后,在与相应的风洞实验结果进行比较且论证了计算结果正确性的基础上,对相同冰厚、不同冰形,以及相同冰形、不同冰厚的气动系数特性进行了对比分析.最后,依据流场压力分布特性对气动系数随攻角变化出现尖峰突跳现象的机理进行了分析.In this paper, ADINA is used to calculate the aerodynamic characteristics of iced-conductors in typical shapes, namely, crescent-shaped, alary-shaped, fan-shaped and D-shaped, under different wind speeds and with different ice thicknesses. The obtained aerodynamic torsion coefficient, lift coefficient and drag coefficient are compared with the experimental results in wind tunnel tests and the validity of the numerical results is proved. Then, the effects of ice shapes and ice thickness on the aerodynamic characteristics are discussed. Finally, the mechanism for the appearance of sudden peak in the aerodynamic coefficient curves vs. attack angle is investigated.

关 键 词：覆冰导线 气动力系数 风洞实验 绕流气动计算 舞动 

分 类 号：TU312.1[建筑科学—结构工程]