An Experimental Study on Mitigating Dynamic Ice Accretion Process on Bridge Cables with a Superhydrophobic Coating
An Experimental Study on Mitigating Dynamic Ice Accretion Process on Bridge Cables with a Superhydrophobic Coating
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DOI：
10.1016/j.expthermflusci.2021.110573
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发表时间：
2021-12
影响因子：
3.2
通讯作者：
Yihua Peng;R. Veerakumar;Zichen Zhang;Haiyang Hu;Yang Liu;Xuhui He;Hui Hu
中科院分区：
文献类型：
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作者：
Yihua Peng;R. Veerakumar;Zichen Zhang;Haiyang Hu;Yang Liu;Xuhui He;Hui Hu
通过试验研究，评估了利用超疏水表面（SHS）涂层减缓桥梁缆索积冰的有效性，并分析了不同覆冰条件下作用于桥梁缆索的气动力特性。两种桥式电缆型号（即，具有未处理的亲水性表面的模型和具有SHS涂覆的表面的模型）用于比较研究。结果表明，SHS涂层对拉索表面进行处理后，拉索的动态积冰过程和作用在桥梁模型上的气动力发生了显著变化。结果表明，与未处理的电缆模型相比，SHS涂层电缆模型的覆冰范围更窄，积冰量更少，气动阻力更小。虽然SHS涂层被认为是不太有效的缓解结冰条件下的雾凇结冰，更粗糙的雾凇冰粒内的水滴直接碰撞区的SHS涂层的电缆表面的积累造成了更大的减少作用在电缆模型上的气动阻力在雾凇结冰过程的初始阶段。所获得的积冰图像与气动力测量相关，以便更好地了解桥梁电缆结冰缓解背景下的基本物理。
An experimental study is conducted to evaluate the effectiveness of utilizing a superhydrophobic surface (SHS) coating to mitigate ice accretion on bridge cables and to characterize the resultant aerodynamic forces acting on bridge cables under different icing conditions. Two bridge cable models (i.e., a model with untreated hydrophilic surface and a model with SHS coated surface) were used for a comparative study. The dynamic ice accretion process and the resultant aerodynamic forces acting on the bridge models were found to change significantly after applying the SHS coating to treat the cable surface. Under glaze icing condition, the SHS coated cable model was found to have much narrower ice coverage, less amount of accreted ice mass, and smaller aerodynamic drag forces, in comparison to that with untreated cable surface. While the SHS coating was found to be less effective for icing mitigation under rime icing condition, the much rougher rime ice grains accumulated within the droplet direct impinging zone on the SHS coated cable surface caused a greater reduction of the aerodynamic drag forces acting on the cable model at the initial stage of the rime icing process. The acquired ice accretion images were correlated with aerodynamic force measurements for a better understanding of the underlying physics in the context of bridge cable icing mitigation.