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当前位置: 首页 > 文章 > 丁坝长度对回流长度影响的数值模拟研究 沈阳农业大学学报 2014 (2) 195-199
Position: Home > Articles > Influence of Spur-dike Length on the Recirculation Scale by Numerical Simulation Journal of Shenyang Agricultural University 2014 (2) 195-199

丁坝长度对回流长度影响的数值模拟研究

作  者：
郑艳;魏文礼;刘玉玲
单  位：
西安理工大学水利水电学院
关键词：
丁坝;数值模拟;回流长度
摘  要：
为了改善丁坝后因回流导致的流态恶化、泥沙淤积等问题,进一步研究丁坝长度对回流区长度的影响。运用计算流体力学(CFD)方法,对宽浅河道中非淹没丁坝的流场进行二维数值模拟研究,并与试验值进行对比。结果表明:RNG k-ε模型能够较好地模拟丁坝下游的回流尺度,能够较好地描述丁坝下游实际回流的产生、扩散及消失过程。说明在宽浅河道中,丁坝长度对回流长度显著影响,丁坝越长,回流边线越长越宽;河宽束窄系数随丁坝相对长度增加而增大,两者呈线性关系。
译  名：
Influence of Spur-dike Length on the Recirculation Scale by Numerical Simulation
作  者：
ZHENG Yan;WEI Wen-li;LIU Yu-ling;College of Water Conservancy and Hydropower, Xi'an University of Technology;
关键词：
spur-dike;;numerical simulation;;recirculation scale
摘  要：
In order to solve the deterioration, sediment deposition problems caused by recirculation flows due to spur dikes, the influence of length of a spur dike to the length of recirculation zone was studied. The method of computational fluid dynamics(CFD) was used to numerically study the 2D flow field in wide and shallow region with a non-submerged spur-dike. The comparison of measured data and the simulation results showed that the RNG k-ε model could better simulate the dike and describe the actual characteristics generated spur-dikes, the recirculation diffusion and disappearing process. The flow structures with different lengths of spur-dike under the same conditions were simulated with the model. By the dimensional analysis and the comparative analysis of numerical simulation results, the relation of groin length and recirculation scale was obtained. The longer the spur-dike, the longer and wider the recirculation; the coefficient of river being narrowed increases with the increase of relative length of a spur-dike.

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