摘要
采用有限体积法和SIMPLEC算法,求解雷诺数在亚临界区内的均匀黏性不可压缩流体的N-S方程,对风吹过平行布置的覆冰三分裂导线的气动力特性进行计算流体动力学(CFD)数值模拟.为克服数值模拟在高雷诺数下的数值不稳定性,在求解N-S方程时采用QUICK迎风格式,其对流项为三阶精度,其余项如扩散项等为二阶精度.针对新月形和扇形2种典型覆冰三分裂导线,分析平行布置的三分裂导线各子导线尾流间的相互作用及其对气动力特性的影响.计算结果表明,新月形覆冰导线比扇形覆冰导线舞动的风攻角范围大,但前者的舞动振幅小于后者;分裂导线中处于尾流区的子导线的气动力系数均小于迎风面子导线的气动力系数,且扇形覆冰导线比新月形覆冰导线更为显著.
The aerodynamic characteristics of wind blowing over three parallel bundled iced transmission lines were simulated by computation fluid dynamics （CFD） technology.The finite volume method and the SIMPLEC algorithm were used to solve the Navier-Stokes equations for the uniform viscous and incompressible flow when Reynolds number was in sub-critical area.In order to overcome the numerical instability for high Reynolds number flows,quadratic up wind scheme （QUICK） was incorporated for the Navier-Stokes equations,which is of third-order accuracy for the advection and remains only second-order accuracy for other terms such as diffusion.The effect of the wake interaction on the aerodynamic characteristics was analyzed for crescent and fan-shaped iced three bundled transmission lines.The results show that the scope of negative Deng Hartog coefficient for the crescent iced transmission lines is wider than that for the fan-shaped iced transmission lines,but the fan-shaped iced transmission lines gallop more violent than the crescent iced transmission lines.The aerodynamic coefficient of the leeward line is smaller than that of the upward line,and this is more evident for fan-shaped iced lines than for crescent iced lines.
出处
《浙江大学学报（工学版）》
EI
CAS
CSCD
北大核心
2010年第1期174-179,共6页
Journal of Zhejiang University：Engineering Science
基金
国家自然科学基金重点资助项目(50638010)
关键词
驰振
分裂导线
气动力特性
数值模拟
galloping
bundled transmission lines
aerodynamic characteristics
numerical simulation
