黄骅港风生流及紊动的三维特性

发布时间：2018-11-10 12:31

【摘要】：通过近15年的建设,黄骅港典型的半封闭式港区于2012年基本建成,3条长导堤对流场和紊动能的分布特征影响显著.基于Delft3DFLOW软件建立黄骅港三维潮流数学模型和紊流模型,将已验证的模型与ENE向6、8级风耦合,研究2012年工况下黄骅港风生流及紊动的三维时空分布特征.通过定量分析可得,ENE向风作用下的黄骅港风生流由东南向西北方向运动,对潮流场的影响显著;与无风相比,6级风作用时流速与紊动能的量值、水平分布以及垂向结构的变化较小,但8级风作用时流速与紊动能的水平分布与垂向结构变化显著,紊动能增加近2倍;垂向平均紊动能与垂向平均流速的分布规律基本一致,紊动能在涨潮期间较落潮期间强;在8级风作用时,风应力在水体表层产生的紊动能明显强于底部边界层作用产生的紊动能,可达2.5倍;长导堤环抱港池内的水体流速和紊动能与港池外相比大幅减弱.
[Abstract]:After nearly 15 years of construction, the typical semi-closed port area of Huanghua Port was basically built in 2012, and the distribution characteristics of the flow field and turbulent energy of the three long guide levees were significantly affected. Based on the Delft3DFLOW software, the 3D tidal current mathematical model and turbulence model of Huanghua Port are established. The verified model is coupled with the ENE to the wind of 6 ~ 8, and the three-dimensional spatial and temporal distribution characteristics of wind-induced flow and turbulence in Huanghua Port in 2012 are studied. Through quantitative analysis, it can be concluded that the wind-induced current in Huanghua Port moves from southeast to northwest under the action of ENE wind, which has a significant effect on the tidal current field. Compared with no wind, the magnitude of velocity and turbulent energy, horizontal distribution and vertical structure change less, but the horizontal distribution of velocity and turbulence energy and vertical structure change obviously, and the turbulent energy increases nearly 2 times. The distribution of vertical mean turbulent energy is basically consistent with that of vertical mean velocity, and the turbulent energy is stronger in the period of high tide than in the period of falling tide. The turbulence energy generated by wind stress on the surface of the water body is obviously stronger than that generated by the bottom boundary layer, which can reach 2.5 times, and the velocity and turbulent energy of the water body around the harbor pool of the long guide embankment are greatly weakened compared with those outside the port pool.
【作者单位】：同济大学土木工程学院;上海海洋大学海洋科学学院;天津地质调查中心;
【基金】：中国地质调查局资助项目(1212011120087)
【分类号】：TV148

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