输电线路覆冰时导线表面形状对碰撞系数的影响

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Abstract Icing on the transmission lines is a physical process in which super-cooled water droplets collide with the conductors and then are trapped.Instead of the real model, the simple one which has a circular section is usually used in the calculation of the collision coefficient, which reduces the accuracy of the calculation.Based on the fluid mechanics, the collision processes between the water droplets and both the real model and the simple model are simulated by the computational fluid dynamics software Fluent and the influences of the conductor surface shape on the velocities of air and droplets, the droplets trajectory, and the collision coefficient are analyzed.The results show firstly that, compared with the simple model, the air velocity of the real model is smaller.Secondly, the real model has a smaller droplets velocity, a more obvious streaming, and a more outward droplets trajectory.Finally, the collision coefficient of the real model is always smaller than that of the simple model.Therefore, the real model should be used in order to ensure the accuracy of the icing model.

Key words： Transmission lines icing collision coefficient surface shape

Received: 14 May 2015 Published: 15 July 2016

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TM726

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	Zhang Jian
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Cite this article:

Zhang Jian,He Qing. Influence of Conductor Surface Shape on Collision Coefficient During Transmission Line Icing[J]. Transactions of China Electrotechnical Society, 2016, 31(13): 209-217.

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https://dgjsxb.ces-transaction.com/EN/ OR https://dgjsxb.ces-transaction.com/EN/Y2016/V31/I13/209

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