明渠流通用数学模型的建立与研究  

Establishment and research of general mathematical model for open channel flow

作　　者：李宁 向德华 孟涛[2] LI Ning;XIANG Dehua;MENG Tao(Hunan Institute of Metrology and Test,Changsha 410014,China;National Institute of Metrology,Beijing 100029,China)

机构地区：[1]湖南省计量检测研究院,湖南长沙410014 [2]中国计量科学研究院,北京100029

出　　处：《中国测试》2020年第S01期6-10,共5页China Measurement & Test

基　　金：国家公益性行业科研专项(201510003-5);湖南省科技创新计划资助项目(2018XK2008)

摘　　要：建立表征明渠断面流速分布的通用数学模型,针对巴歇尔槽和无喉道槽两种典型明渠,分别使用CFD模拟、LDV(激光多普勒测速仪)实验对模型进行验证,比较通用数学模型计算值、CFD模拟值和LDV实测值,其中通用数学模型计算值和LDV实测值差异在±3%以内,分析产生差异的原因,验证通用数学模型的可靠性。A general mathematical model for characterizing the velocity distribution of the open channel section was established.The CFD simulation and LDV(laser Doppler velocimeter)experiments were used to verify the model and compare the typical open channels of the Parshall flume and the throatless groove.The general mathematical model calculated value,CFD analog value and LDV measured value,wherein the difference between the calculated value of the general mathematical model and the measured value of LDV is within±3%,the reason for the difference is analyzed,and the reliability of the general mathematical model is verified.

关 键 词：计量 明渠 流量 数学模型 LDV 

分 类 号：TV133[水利工程—水力学及河流动力学]