【摘要】 墩柱周围水流涡漩区为航行的不安全区域,该区域宽度的确定对通航河流桥梁附近航道及桥梁设计具有重要意义.采用粒子图像测速技术,对直槽和弯槽中圆柱周围近区表层的速度分布进行了测量.依据所测得数据,可知墩柱周围涡漩区的宽度与墩前行近水流条件、河槽弯曲情况等因素有关;并得到了圆形墩柱两侧水流表层涡漩区宽度与弗汝德数的相关关系.更多还原

【Abstract】 The superficial eddy area around a pier is dangerous to navigation.The determination of its width is important for design of waterway near bridge and of bridge itself. By applying particle image velocimetry (PIV) technique, velocity fields around the bridge pier are measured carefully in frank and bend trough. The results show that the width of eddy area around a pier is dependent on the approaching flow condition and meander conditions of trough. The correlation between the width of eddy area around a pier and Froude number is obtained.更多还原