Numerical analysis of glaze ice accretion on cables by considering the effects of typical in-plane vibrations

IF 3.4 2区工程技术 Q1 ENGINEERING, MECHANICAL

Journal of Fluids and Structures Pub Date : 2024-11-20 DOI:10.1016/j.jfluidstructs.2024.104229

Chao Zhou , Jiaqi Yin

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引用次数: 0

Abstract

During the glaze icing process, cables experience vibrations due to the presence of aerodynamic forces, gravity, and other external forces. In most existing glaze icing models, the cables are assumed to be fixed, and water film is just run-down streams that do not reflect the complexity of the ice accretion process. To reveal the effects of in-plane motions of cable on the glaze icing process, two typical in-plane motions of aeolian vibration and galloping are taken into consideration and a mathematical water film-ice layer model is proposed for the first time. Based on the water film-ice layer model, ice accretion and water flow on the vibrating cables are studied, and key parameters of Collision Efficiency (CE), aerodynamic coefficients, and water film are evaluated by comparison with fixed cables. Moreover, by iterating the discretized mass and energy conservation equations with the computed aerodynamic coefficients, the effects of in-plane motions of the cable on water film and ice shapes are computed. The model then is verified with published experimental and numerical data. The results show that in-plane motions of the cables enlarge the windward face in dynamic forms which have certain effects on water film and ice shapes, and the model could provide accurate predictions of ice accretion.

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通过考虑典型面内振动的影响对电缆上的釉冰沉积进行数值分析

在釉面结冰过程中，由于空气动力、重力和其他外力的存在，电缆会发生振动。在现有的大多数釉面结冰模型中，电缆被假定为固定的，水膜也只是流下的水流，不能反映复杂的结冰过程。为揭示缆索平面内运动对釉面结冰过程的影响，考虑了风化振动和奔腾两种典型的平面内运动，首次提出了水膜-冰层数学模型。基于水膜-冰层模型，研究了振动缆索上的积冰和水流，并通过与固定缆索的对比，评估了碰撞效率（CE）、空气动力系数和水膜等关键参数。此外，通过利用计算出的空气动力系数迭代离散质量和能量守恒方程，计算了缆索平面内运动对水膜和冰形状的影响。然后用已公布的实验和数值数据对模型进行了验证。结果表明，缆索的平面内运动以动态形式扩大了迎风面，对水膜和冰的形状产生了一定的影响，该模型可以准确预测冰的增加。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Fluids and Structures 工程技术-工程：机械

CiteScore

6.90

自引率

8.30%

发文量

173

审稿时长

65 days

期刊介绍： The Journal of Fluids and Structures serves as a focal point and a forum for the exchange of ideas, for the many kinds of specialists and practitioners concerned with fluid–structure interactions and the dynamics of systems related thereto, in any field. One of its aims is to foster the cross–fertilization of ideas, methods and techniques in the various disciplines involved. The journal publishes papers that present original and significant contributions on all aspects of the mechanical interactions between fluids and solids, regardless of scale.