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浙江大学学报(工学版)
JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE)
Civil Engineering, Transportation Engineering     
Three-dimensional characteristics of wind-induced current and turbulence at Huanghua Harbor
KUANG Cui ping, SONG Hong lin, GU Jie, MA Zhen
1. College of Civil Engineering, Tongji University, Shanghai 200092, China;
2. College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China;
3. Tianjin Institute of Geology and Mineral Resources, Tianjin 300170, China
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Abstract  

Huanghua Harbor with a typical semi-closed form was basically completed in 2012 through nearly 15 years of development. The harbor has three long breakwaters which have great influence on the distribution of current field and turbulence energy. A three-dimensional hydrodynamic and turbulence numerical model was established based on Delft3D-FLOW. The validated model coupled with ENE force 6 and 8 wind was applied to analyze the three-dimensional temporal and spatial characteristics of wind-induced current and turbulence under the scenario of 2012. The quantitative analysis revealed that the wind-induced current around Huanghua Harbor moved from SE to NW under ENE wind scenarios and it had a great influence on tidal current field. Compared with no wind scenario, the magnitude, horizontal distribution and vertical structure of velocity and turbulence energy showed small variation under the force 6 wind, but had a significant change under the force 8 wind, such as the turbulence energy increased about two times. The distribution of depth-averaged turbulence energy and depthaveraged velocity had a similar pattern, and the turbulence energy during flood was stronger than that during ebb. The turbulence induced by windshear stress in the surface was far stronger than that induced by bottom boundary layer under the force 8 wind, such as the former can reach 2.5 times of the latter. The current velocity and turbulence energy in harbor basin can be significantly reduced due to the semi-closed form by long breakwaters compared with outer harbor basin.

Published: 01 January 2017
CLC:  TV 148  
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KUANG Cui ping, SONG Hong lin, GU Jie, MA Zhen. Three-dimensional characteristics of wind-induced current and turbulence at Huanghua Harbor. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 2017, 51(1): 38-45.


黄骅港风生流及紊动的三维特性

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Delft3D FLOW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.

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