摘要
采用CCHE 2D软件中的k-ε闭合紊流模型,对大西沟石门子渠首人工弯道段进行二维水沙数值模拟研究,得到弯道水位横比降、典型断面泥沙冲淤形态、泥沙的横向输移现象以及泥沙冲淤后的河床变形,并将断面泥沙冲淤形态与物理模型试验数据进行对比,二者吻合较好,并且符合弯道凹岸冲刷,凸岸淤积的机理。通过对比分析可知,CCHE2D软件在用于模拟弯道水沙运动时,可充分展现弯道环流作用下的泥沙冲淤效果,但对于横断面环流作用下的流速矢量分布及水沙变化过程还需借助三维软件。
Using the k ~ ε closure turbulence model in CCHE2 D software,This paper simulate the water and sediment movement in artificial bend of the Shimenzi headwork at Daxigou. Furthermore,we get the transverse slope of water surface,the sediment scouring and deposition patterns of typical sections,the sediment of lateral transport phenomena and the riverbed deformation after sediment deposition. Compare the numerical simulation results about the sediment scouring and deposition patterns of sections with the experimental data. The result is good and in line with the mechanism of the concave bank erosion,convex bank deposit. Analysising of the results predicted showed that the CCHE2 D software used to simulate the curve of water and sediment,can fully demonstrate the sediment scouring and deposition patterns under the effect of the circulation flow. But for the cross-sectional velocity vector distribution and the water and sediment change process under the effect of the circulation flow,three-dimensional software is needed.
出处
《水资源与水工程学报》
2014年第6期207-209,214,共4页
Journal of Water Resources and Water Engineering
基金
新疆维吾尔自治区国际科技合作计划资助项目(20136021)
关键词
CCHE
2D软件
弯道水沙
冲淤形态
数值模拟
CCHE 2D software
water and sediment
the scouring and deposition patterns
numerical simulation
