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	输电导线的覆冰时变仿真模型
	梁曦东 ; 李雨佳 ; 张轶博 ; 刘瑛岩 ; LIANG Xidong ; LI Yujia ; ZHANG Yibo ; LIU Yingyan
	2016-03-30 ; 2016-03-30
关键词	输电线 不规则覆冰 边界元法 仿真模型 覆冰密度 时变 transmission line irregular icing boundary element method simulation model icing density time-dependent TM752.5
其他题名	Time-dependent Simulation Model of Ice Accretion on Transmission Line
中文摘要	为了揭示输电线路导线覆冰形成过程,从空气动力学和热力学角度出发,建立了包含捕获过冷却水滴和冰面热传递等过程的覆冰预测模型。采用边界元法求解了2维不规则物体绕流的空气流场;在假定的气液两相分离的条件下得到了水滴运动控制方程;并采用二阶差分方程求得过冷水滴的运动轨迹,得到了输电线表面各单元的瞬时局部碰撞率。建立并求解输电线表面覆冰的热平衡方程,从而得到各表面单元的覆冰情况,并结合覆冰时间对覆冰过程进行模拟。所得到的覆冰形貌和覆冰质量与已有实验结果基本相符;且该模型的环境参数和导线状态等输入条件在计算过程中可以随时改变而不影响模型的连续计算。此外,采用该模型可以得到时变的覆冰形貌和覆冰质量,能较好地适应实际情况中的复杂时变气象条件。; In order to reveal the forming process of ice accretion on transmission lines, on the basis of fluid dynamics and thermodynamics, we established an ice accretion prediction model, including the process of lines capturing super-cooled water droplet and heat transfer on ice surface. In the model, we obtained the 2-D air flow field of irregular objects using the boundary element method. Then under the condition of gas-liquid two-phase separation, we acquired the motion control equation of water droplet, which was combined with the movement trajectory of super-cooled water droplet, and used the second-order differential equation to calculate the instantaneous local collision efficiency of each surface unit of transmission line. Consequently, after building and solving heat balance equations, we obtained icing situation of surface units, and then taking the icing time into account, we simulated the process of ice accretion. The obtained icing morphology and weight accord with the existing experimental results. Moreover, the model can run continuously regardless of inputting time-varying environmental parameters and conductor status during calculation. The time-varying icing morphology and weight on conductors can be calculated using the proposed model, while the calculation adapts to practical, complex, and time-varying weather conditions.
语种	中文 ; 中文
内容类型	期刊论文
源URL	[http://ir.lib.tsinghua.edu.cn/ir/item.do?handle=123456789/142460]
专题	清华大学
推荐引用方式 GB/T 7714	梁曦东,李雨佳,张轶博,等. 输电导线的覆冰时变仿真模型[J],2016, 2016.
APA	梁曦东.,李雨佳.,张轶博.,刘瑛岩.,LIANG Xidong.,...&LIU Yingyan.(2016).输电导线的覆冰时变仿真模型..
MLA	梁曦东,et al."输电导线的覆冰时变仿真模型".(2016).

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