摘要
在总结国内外长喉道量水槽研究成果和近几年在江苏省南通市实际应用经验的基础上,全面系统地介绍了长喉道量水槽的结构、量水原理、设计计算方法,在灌区量水现场对设计计算方法作了一系列的验证试验。试验结果表明:按该设计方法设计的长喉道量水槽具有很高的测流精度,流量相对误差小于5%。
The structure, flow measurement principle and design method of long-throated flumes are described. Applying the continuity equation and the energy equation of flow ,the fundamental principle of hydraulic calculation for long-throated flumes is discussed. The head loss of fluid which flows through the long-throated flume is analyzed by using the boundary layer theory. A method for calculating the relationship between water level and discharge of long-throated flume is obtained. Long-throated flumes can be calibrated using computer programs, thus eliminating the need for laboratory calibration. The field testing showed that the calculating method can predict the measured flow rate with less than 5% error.
出处
《排灌机械》
2003年第6期23-26,共4页
Drainage and Irrigation Machinery
