基于堰流的矩形明渠跌水量水研究  

Study on Flow Measurement Based on the Theory of Weir Flow in Rectangular Channel with Free Overfall

作　　者：陈小攀[1,2] 李乃稳[1,2] 李龙国[1,2] 刘超[1,2] 

机构地区：[1]四川大学水力学与山区河流开发保护国家重点实验室,成都610065 [2]四川大学水利水电学院,成都610065

出　　处：《灌溉排水学报》2015年第7期78-82,共5页Journal of Irrigation and Drainage

基　　金：国家自然科学基金青年基金项目(51009102;51179133)

摘　　要：基于堰流的测流原理,推求出矩形渠道自由跌水的流量理论计算公式,其中综合流量系数(m)可由明渠底坡(S)和糙率(n)共同确定,并针对6种明渠底坡(S)、2种糙率(n)进行了一系列模型试验。结果表明,矩形明渠量水堰过流顺畅,测流精确,综合流量系数m与S(1/2)/n存在线性关系,流量试验值与理论计算值吻合良好。Based on the analysis on principle of weir flow, the theoretical formula for the flow measurement in rectangular channel with free overfall was proposed. The coefficient of discharge correction was deter- mined by channel slope and channel roughness. A serial of experiments about flume were carried out with 9 kinds of channel roughness and 2 kinds of channel slope. The results showed that the flow through the weir was smooth, the discharge formula was concise and practical, and the relationship between flow coef- ficient m and was linear, the computational results correspond closely with the experimental results.

关 键 词：矩形明渠 流量测量 堰流 跌水 

分 类 号：TV133[水利工程—水力学及河流动力学]