| 考虑动水压力梯度的自由水面计算 |
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| 引用本文： | 陈雄波,唐洪武,杨丽丰.考虑动水压力梯度的自由水面计算[J].水动力学研究与进展(A辑),2005,20(6):802-808. |
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| 作者姓名： | 陈雄波 唐洪武 杨丽丰 |
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| 作者单位： | 1. 黄河勘测规划设计公司,河南郑州,450003
2. 河海大学水利水电工程学院,江苏南京,210098 |
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| 摘 要： | 本文首先指出了两种常用计算自由水面方法存在的不足，提出在构造标高函数求解水位方程时，应考虑沿水深平均的动水压力梯度的影响，并说明了具体的计算步骤，推导出一种简便的计算近底平均流速的关系式，最后通过两个计算实例表明：引入动水压力梯度后，数值计算结果与实测值更为接近。
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| 关 键 词： | 三维水流数学模型 自由水面 动水压力梯度 近底平均流速 |
| 文章编号： | 1000-4874（2005）06-0802-07 |
| 收稿时间： | 2004-10-15 |
| 修稿时间： | 2005-08-25 |
Free surface computation considering hydrodynamic pressure gradient |
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| CHEN Xiong-bo,TANG Hong-wu,YANG Li-feng.Free surface computation considering hydrodynamic pressure gradient[J].Journal of Hydrodynamics,2005,20(6):802-808. |
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| Authors: | CHEN Xiong-bo TANG Hong-wu YANG Li-feng |
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| Affiliation: | 1. Yellow River Engineering Consulting Ltd. , Zhengzhou 450003, China ;2. College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China |
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| Abstract: | Firstly,several disadvantages of present free water surface computation method were discussed.It is demonstrated that the gradient of depth-averaged dynamic pressure should be taken into consideration in dealing with the free water surface,because the pressure consists of static pressure and dynamic pressure.A simple and convenient approach to compute the near-bottom average velocity was obtained.Flume meahuring have been used to verify it's validity. |
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| Keywords: | 3-D flow mathematic model free surface hydrodynamic pressure gradient near-bottom average velocity |
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