明渠非恒定流的一维浅水波与三维VOF耦合模拟
发布时间：2018-08-24 07:49
【摘要】：提出了一种一维浅水波与三维VOF模型耦合的明渠非恒定流数值计算方法。此方法通过建立两个计算模型间变量的数学关系,实现由三维区域为一维区域提供流量,一维区域为三维区域提供压强和水体体积分数分布。用耦合方法模拟了矩形断面渠道增、甩负荷两种典型非恒定工况,将结果与一维浅水波模型计算结果对比,表明本方法在定性上正确,在定量上准确度也较高。最后利用这一方法模拟了某水电站带引水渠压力前池的非恒定流现象,获得了最大溢流量、最高和最低水位等重要参数。耦合方法同时结合了一维模型计算较细长明渠渐变流的效率和三维方法模拟局部明渠急变流的准确性,可为分析工程中复杂的明渠流动问题提供更优选择。
[Abstract]:In this paper, a numerical method of unsteady flow in open channel is presented, which is coupled with one dimensional shallow water wave and three dimensional VOF model. By establishing the mathematical relationship between the variables of the two models, the method can provide the flow rate from the three-dimensional region to the one-dimensional region, and the one-dimensional region to the three-dimensional region to provide the pressure and the distribution of the volume fraction of the water body. The coupling method is used to simulate two typical unsteady working conditions of rectangular cross-section channel increasing and load rejection. The results are compared with those of one-dimensional shallow water model. The results show that the method is correct qualitatively and has high quantitative accuracy. At last, the unsteady flow in the pressure forebay with diversion channel is simulated by this method, and some important parameters, such as maximum overflow flow, maximum water level and minimum water level, are obtained. The coupling method combines the efficiency of one-dimensional model and the accuracy of 3D method to simulate the local open channel flow, which can provide a better choice for the analysis of complex open channel flow problems in engineering.
【作者单位】： 厦门理工学院环境科学与工程学院;重庆交通大学重庆西南水运工程科学研究所;厦门理工学院土木工程与建筑学院;
【基金】：厦门市科技计划项目(3502Z20150051) 厦门理工学院高层次人才项目(YKJ15042R,YKJ14025R) 福建省中青年教师教育科研项目(JA15384) 重庆市科委自然科学基金计划资助项目(cstc2016jcyj A1935) 重庆市教委自然科学基金计划资助项目(KJ1600514)
【分类号】：TV133
[Abstract]:In this paper, a numerical method of unsteady flow in open channel is presented, which is coupled with one dimensional shallow water wave and three dimensional VOF model. By establishing the mathematical relationship between the variables of the two models, the method can provide the flow rate from the three-dimensional region to the one-dimensional region, and the one-dimensional region to the three-dimensional region to provide the pressure and the distribution of the volume fraction of the water body. The coupling method is used to simulate two typical unsteady working conditions of rectangular cross-section channel increasing and load rejection. The results are compared with those of one-dimensional shallow water model. The results show that the method is correct qualitatively and has high quantitative accuracy. At last, the unsteady flow in the pressure forebay with diversion channel is simulated by this method, and some important parameters, such as maximum overflow flow, maximum water level and minimum water level, are obtained. The coupling method combines the efficiency of one-dimensional model and the accuracy of 3D method to simulate the local open channel flow, which can provide a better choice for the analysis of complex open channel flow problems in engineering.
【作者单位】： 厦门理工学院环境科学与工程学院;重庆交通大学重庆西南水运工程科学研究所;厦门理工学院土木工程与建筑学院;
【基金】：厦门市科技计划项目(3502Z20150051) 厦门理工学院高层次人才项目(YKJ15042R,YKJ14025R) 福建省中青年教师教育科研项目(JA15384) 重庆市科委自然科学基金计划资助项目(cstc2016jcyj A1935) 重庆市教委自然科学基金计划资助项目(KJ1600514)
【分类号】：TV133
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1 王兆印;中德加强合作研究非恒定流输沙[J];泥沙研究;1996年01期
2 白玉川,万艳春,黄本胜,顾元h，
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