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浙江大学学报(工学版)
浙江大学学报(工学版)
土木工程     
正态曲面丁坝三维水流数值模拟
孙志林,於刚节,许丹,马国淇
浙江大学 港口海岸及近海工程研究所,浙江 杭州 310058
Three-dimensional numerical simulation of flow around spur dike with bivariate normal surface
SUN Zhi lin, YU Gang jie, XU Dan, MA Guo qi
Institute of Port, Coastal and Offshore Engineering, Zhejiang University, Hangzhou 310058, China
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摘要：

针对丁坝周围流动呈强三维紊流特征,相应坝头局部床面不可避免地产生冲刷坑,严重时导致丁坝水毁的问题,提出正态曲面形式的新型丁坝结构,可以优化丁坝周围水流结构,减小坝头局部冲刷.基于三维数值模拟研究新型丁坝的水动力特性.结果表明,与梯形丁坝相比,正态曲面丁坝可以起到平顺水流、减少剧烈紊动和增大过流面积的作用,避免流线过度弯曲和集中,减小丁坝周围的涡量强度,在一定程度上减弱坝头水动力.坝头曲面能够削弱坝头下潜流的冲刷作用,降低坝头局部冲刷深度,利于丁坝稳定.
Abstract:

The flow around a spur dike has strong three dimensional turbulent characteristics, which leads to the development of a local scour around the groyne inevitably and may cause damage of the whole works. The damage of spur dike leads some problems. The river bank will be washed by jet flow easily when it’s without the spurs protection, which may influence channel stability. A new spur dike with bivariate normal surface was proposed to optimize the flow structure and reduce the local scour at the groyne head in order to avoid the problems. A series of numerical simulations were conducted in order to study the hydrodynamic characteristics of the new structure. The simulation results show that the bivariate normal surface can smooth the flow, reduce severe turbulence and enlarge the flow area, which make streamline not to gather together suddenly. The intensity of vorticity and flow dynamics around the groyne head were reduced. The curved surface can weaken the downflow, which reduces the local scour and benefits the stability of spur dike．
出版日期: 2016-07-23
:  TV 863  
基金资助:

教育部博士点基金资助项目（20120101110108）；国家自然科学基金资助项目（40776007）.
通讯作者: 许丹，女，助理研究员. ORCID:0000000209990253.     E-mail: darrenxu@zju.edu.cn
作者简介: 孙志林（1956-），男，教授，从事水沙动力学与河口海岸数值模拟研究.ORCID:0000000264463472.E-mail: oceansun@zju.edu.cn
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引用本文:

孙志林,於刚节,许丹,马国淇. 正态曲面丁坝三维水流数值模拟[J]. 浙江大学学报(工学版), 10.3785/j.issn.1008-973X.2016.07.004.

SUN Zhi lin, YU Gang jie, XU Dan, MA Guo qi. Three-dimensional numerical simulation of flow around spur dike with bivariate normal surface. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 10.3785/j.issn.1008-973X.2016.07.004.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2016.07.004    或    http://www.zjujournals.com/eng/CN/Y2016/V50/I7/1247

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