挟沙水流幂律湍流模式研究  

Power law turbulence model of sediment laden flow

作　　者：白洋[1] 李绍武[1] 张金良[1,2] BAI Yang;LI Shao-wu;ZHANG Jin-liang(State Key Laboratory for Hydraulic Engineering Simulation and Safety,Tianjin University,Tianjin 300350,China;Yellow River Engineering Consulting Co.,Ltd,Zhengzhou 450003,China)

机构地区：[1]天津大学水利工程仿真与安全国家重点实验室,天津300350 [2]黄河勘测规划设计研究院有限公司,河南郑州450003

出　　处：《泥沙研究》2021年第5期15-19,共5页Journal of Sediment Research

基　　金：国家自然科学基金项目(51979185,51879182);国家重点研发计划项目(2018YFC0407505)。

摘　　要：围绕如何描述挟沙水流湍流特性和确定湍流模式这一工程设计所关心的问题,建立了一种合理实用的挟沙水流湍流特性表达式。通过湍流理论分析和挟沙水流湍流特性试验,构建了与浑水含沙浓度相关的一种非牛顿切应力型湍流模式——幂律湍流模式,进而求解雷诺方程得到挟沙水流的流速分布,回归分析挟沙水流湍流特性试验数据,率定流速分布表达式参数,从而确定挟沙水流幂律湍流模式参数。A expression of the turbulence characteristics of the sediment laden water flow was carried out.As for the specific method,the first step is to construct a non-Newtonian shear stress turbulence model related to the sediment concentration of muddy water through turbulence theory analysis and sediment laden flow turbulence characteristics experiment.Then,it is to solve the Reynolds equation to obtain the velocity distribution of the sediment laden water flow,regress analyze the experimental data of the sediment laden water flow turbulence characteristics,and calibrate the velocity distribution expression parameters,as well as determine the power law turbulence model parameters of the sediment laden water flow.

关 键 词：挟沙水流 非牛顿流体 湍流 幂律湍流模式 浑水 

分 类 号：TV143.1[水利工程—水力学及河流动力学]