环抱式防波堤口门航道横流三维特性研究

环抱式防波堤口门易出现较大横流,且三维特性明显。针对连云港主港区深水航道,建立三维潮流数学模型,并用现场航槽实测资料进行验证,在此基础上计算分析了不同潮差条件下口门段进港航道横流的三维特性。研究结果表明:最大横流约出现在高潮位前1.5 h,自表层至底层相继出现,且表、底层出现时刻仅相差0.5 h;因航道边坡较小,最大横流时未见水流分离现象,航槽底部没有反向流;各层最大横流值均与涨潮潮差有关,且相关程度高;航道内最大横流垂向分布梯度随潮差增加略有增大。

Research on three-dimensional characteristics of cross-flow in approach channel at entrance of encircle breakwater

Higher cross-flow with obvious three-dimensional characteristics will appears at the entrance of encircle breakwater. For the deep-water channel of Lianyungang, a three-dimensional tidal current numerical model was established and verified by the measured data of waterway. Based on the above works, the three-dimensional characteristics of cross-flows in the approach channel of the harbor under different tidal ranges were calculated and analyzed. The results show that: the maximum cross-flow appears at about 1.5 h before high tide level, and emerges successively from the water surface to the bottom lasting only 0.5 h; Due to the small channel slope, there exist no flow separation and no reverse flow at the waterway bottom when the maximum cross-flow comes out; The maximum cross-flow in different layers is high related to the tidal range of flood tide; The gradient distribution increases slightly with the tidal range growing.