模袋混凝土渠道糙率影响因素数值模拟研究  

Numerical Simulation Study on the Factors Affecting the Roughness of Bag Concrete Channel

作　　者：张海玲 霍轶珍 郭彦芬 高意如 王文达 ZHANG Hailing;HUO Yizhen;GUO Yanfen;GAO Yiru;WANG Wenda(Hetao College of Civil Engineering, Bayannao’er 015000, China;Hetao Irrigation and Drainage Engineering Research Center, of Inner Mongolia Autonomous Region, Bayannao’er 015000, China;Hetao Culture Institute of Inner Mongolia,Bayannao’er 015000, China)

机构地区：[1]河套学院土木工程系,内蒙古巴彦淖尔015000 [2]内蒙古自治区河套灌区灌溉排水工程技术研究中心,内蒙古巴彦淖尔015000 [3]内蒙古河套文化研究所,内蒙古巴彦淖尔015000

出　　处：《人民黄河》2019年第2期157-160,共4页Yellow River

基　　金：内蒙古自治区高等学校科学研究项目(NJZY16334);内蒙古自治区高等学校创新团队发展计划项目(NMGIRT-B1611)

摘　　要：以模袋混凝土衬砌渠道为研究对象,使用FLUENT数值模拟软件对测流渠道建立二维模型,加载速度、压力和壁面粗糙度等边界条件,模拟渠道的流场,得出同一流量时不同水深的断面流速分布图。研究流量、流速与糙率的关系,以期在实际工作中为正确选择糙率系数提供依据。结果表明:对于模袋混凝土衬砌渠道,流速和流量是糙率的影响因素,通过数据相关性分析,糙率与流速、流量成负相关关系;沿渠底向水面的方向,流速逐渐增大,但是最大流速发生在水面以下,并且横向水流从渠道边壁向中央流动,导致较大流速集中在中间区域。In this paper , the FLUENT numerical simulation software was used to establish two-dimensional model , loading velocity , pressure and wall roughness. The flow field of the channel was calculated by using FLUENT numerical simulation software to calculate the flow field of the same flow rate and section velocity profile. The relationship between flow rate , flow velocity and roughness was studied in order to provide the basis for choosing the roughness coefficient correctly in practice. The results show that for the concrete bag lining channel , flow velocity and discharge are the factors of roughness. Through data correlation analysis , roughness is negatively correlated with velocity and discharge;the velocity gradually increases along the direction of the channel ' s bottom , but the maximum velocity occurs below the water surface and the lateral flow from the channel wall to the central flow , resulting in a larger velocity concentrated in the middle area.

关 键 词：渠道 模袋混凝土 流量 流速 糙率 

分 类 号：TV135.3[水利工程—水力学及河流动力学]