河道滩区风机群对漫滩洪水影响的数值模拟研究  

Numerical Simulation Study on the Influence of Fan Cluster in Riparian Zone on Over-bank Flooding

作　　者：孙东坡[1] 马腾飞[1] 

机构地区：[1]华北水利水电大学水力学及河流研究所,河南郑州450045

出　　处：《华北水利水电大学学报（自然科学版）》2016年第1期35-39,共5页Journal of North China University of Water Resources and Electric Power：Natural Science Edition

基　　金：国家自然科学基金重点项目(51039004);国家自然科学基金面上项目(51579103)

摘　　要：对于河道宽滩区修建的风电场工程,其风机塔筒群的阻水作用可能会对所在河段的洪水演进及河势稳定有所影响,必须予以了解和评估。本文基于MIKE21软件,建立了某风电场所在河段的二维平面水动力数学模型,并对模型进行了验证。在验证洪水条件下,特征断面模拟水位与设计水位的相对误差均小于1%,表明模型阻力参数设置比较可靠。对风电场所在滩区的水流阻力进行了概化处理,然后运用模型开展了风电场工程建设前、后两种条件下设计特征洪水的数值模拟,得到了该河段在设计特征洪水演进过程中的水深、流速等数据。通过对比分析工程壅水及主流线位置变化可知,该滩区风机塔筒群引起的工程壅水较低、流速变化较小、主流线位置变化不大,不会引起该河段河势的明显变化。研究成果对滩区风电场工程规划设计具有一定的参考价值。The construction of wind farm project in wide riparian zone may have an impact on flood routing and stability of river regime because of blocking water of towers of fan cluster. Therefore,it is necessary to study and evaluate the project. In this article,a two-dimensional hydrodynamic model of a wind farm was built based on MIKE21 software,and the model was also verified. Under the conditions of the tested floods,the relative error between the simulating water level of representative section and the designed water level was less than 1%,which indicated that the setting of model＇ s resistance parameter was reliable. The flow resistance of the riparian zone where the wind farm locates was calculated generally. Then,the numerical simulation of the design flood was carried out under two conditions before and after the project＇s construction by using the model,and the water depth,flow velocity and other datum of the design flood routing were obtained. Through the comparative analysis of backwater and mainstream line＇s position,we got the results that the backwater caused by towers of fan cluster was low,the flow velocity＇s change was small,and the change of mainstream line＇s position was not big,which would not cause significant changes of the river regime. The research results have certain reference value for planning and design of wind farm in riparian zone.

关 键 词：MIKE21 滩区 风机群 数值模拟 河势变化 

分 类 号：TV131.2[水利工程—水力学及河流动力学]