CAJ | 학술논문

采用CCHE 2 D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， CCHE2 D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。
채용CCHE 2 D연건중적k－ε폐합문류모형，대대서구석문자거수인공만도단진행이유수사수치모의연구，득도만도수위횡비강、전형단면니사충어형태、니사적횡향수이현상이급니사충어후적하상변형，병장단면니사충어형태여물리모형시험수거진행대비，이자문합교호，병차부합만도요안충쇄，철안어적적궤리。통과대비분석가지， CCHE2 D연건재용우모의만도수사운동시，가충분전현만도배류작용하적니사충어효과，단대우횡단면배류작용하적류속시량분포급수사변화과정환수차조삼유연건。
Using the k ~ε closure turbulence model in CCHE 2D 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 sedi-ment 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 experi -mental 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 theCCHE 2 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 .