| 波流环境中垂向圆管射流三维运动和稀释过程模拟 |
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| 引用本文： | 徐振山,陈永平,张长宽.波流环境中垂向圆管射流三维运动和稀释过程模拟[J].水科学进展,2017,28(2):265-275. |
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| 作者姓名： | 徐振山 陈永平 张长宽 |
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| 作者单位： | 1.河海大学港口海岸与近海工程学院, 江苏 南京 210098; |
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| 基金项目： | 国家自然科学基金资助项目（51379072）；中央高校基本科研业务费资助项目（2016B13214） |
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| 摘 要： | 采用大涡数值模拟方法建立了波流环境中垂向圆管射流三维物质输运数学模型，在此基础上分析了波流共同作用下射流运动和稀释过程，并探讨了波浪对射流三维时均浓度特征的影响。数模结果与实测数据的对比表明，该模型能够正确复演波流环境中射流速度和浓度沿水深分布的规律。引入了射流的三维浓度特征指标，即断面最小稀释度及其垂向位置和断面可视范围面积，发现随着波高或波周期的增大，波流环境中射流的断面可视范围面积逐渐增加，这说明波浪对射流的稀释起到一定的促进作用。
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| 关 键 词： | 波流 射流 大涡数值模拟 稀释 |
| 收稿时间： | 2016-07-21 |
Study on three-dimensional movement and dilution of a vertical round jet under the wave-current effect |
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| XU Zhenshan,CHEN Yongping,ZHANG Changkuan.Study on three-dimensional movement and dilution of a vertical round jet under the wave-current effect[J].Advances in Water Science,2017,28(2):265-275. |
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| Authors: | XU Zhenshan CHEN Yongping ZHANG Changkuan |
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| Affiliation: | 1.College of Harbor, Coastal and Offshore Engineering, Hohai University, Nanjing 210098, China;2.State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, China |
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| Abstract: | The flow and dilution of a vertical round jet under the combined effect of wave and current are investigated by using the three dimensional large eddy simulation model, and the wave effect on the 3-D concentration characteristics of the jet is discussed. The comparison between the numerical results and the experimental data shows that, the numerical model is capable of reproducing the distribution of the jet velocity and concentration along the water depth in the wave-current environment. The 3-D concentration characteristic indexes of jet, including the minimum dilution and its vertical position as well as the visual area of the section, are adopted in this study. It is found that, the jet in a wave-current environment shows a larger visual area on the sections as the increasing of the wave height or period, which indicates that the wave has a positive role on the acceleration of jet dilution in the wave-current environment. |
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| Keywords: | wave-current jet large eddy simulation dilution |
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