文章摘要
冰盖下典型复式断面河道水深平均流速的横向分布
The lateral distribution of the average water depth of the typical compound cross-section channel under the ice cover
投稿时间:2020-04-05  修订日期:2020-09-19
DOI:
中文关键词: 冰盖  复式断面  流速分布  准二维模型  
英文关键词: Ice cover  complex section  velocity distribution  quasi-two-dimensional model  shear stress
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目)
作者单位E-mail
邹德昊 黑龙江大学 寒区地下水研究所 717512913@qq.com 
戴长雷 黑龙江大学 寒区地下水研究所 daichanglei@126.com 
郭显峰 黑龙江大学 寒区地下水研究所  
路锦枝 流域水循环模拟与调控国家重点实验室中国水利水电科学研究院  
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中文摘要:
      开展冰盖下典型复式断面河道水深平均流速的横向分布规律研究,对于凌汛防治具有重要意义。本文在SKM法的基础上,结合双层假设理论,并将二次流项并入雷诺切应力项,建立了考虑河床摩擦、冰盖阻力、横向剪切湍流和二次流影响的准二维数学模型。与相应的物理模型实验结果对比发现,所提出的准二维数学模型能够合理的预测复式断面河道各断面的水深平均流速横向分布及河道过流量。本文提出的数学模型,无需通过计算机编程联立求解复杂方程组,即可获得水深平均流速的横向分布特征,对研究具有复式断面的覆冰河道的水流特征具有一定的指导意义。
英文摘要:
      The study of the horizontal distribution law of the average bathymetric velocity of cie-coated rivers with typical compound sections is of great significance for flood control and management. Based on the SKM method, current study incoporated the double-layer hypothesis theory and introduced secondary flow term into the Reynolds shear stress to build a quasi-two-dimensional model. This model took the effects of river bed friction, ice sheet resistance, lateral shear turbulence and secondary flow into account. Compared with the experimental results of the corresponding physical model, the proposed quasi-two-dimensional mathematical model can reasonably predict the horizontal distribution of average bathymetric flow rate and river flow rate in each compond section. The current mathematical model was able to capture chracteristics of of horizontal disribution of average bathymetric flow rate without needs to solve complex equations using computer programming. This will provide significant guidance for the study of water flow characteristics of ice-coated river channels with multiple sections.
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