Abstract：In order to know whether the flow measurement accuracy of the integrated monitoring and control slab gate in the channel with high sediment concentration meets the specification requirements.18 representative branch canals with good flow measurement conditions in Nanshantai pumping irrigation area of Ningxia are selected. By comparing the flow measurement results of the flume without throats, the flow measurement data of the integrated plate gate with measurement and control in diffe-rent irrigation periods are sorted out and analyzed. ANSYS Fluent is used to establish a physical model to simulate and study the variation law of hydraulic performance of the integrated monitoring and control slab gate with sediment concentration. Combined with Rubicon measurement and control integrated plate gate current measurement principle, the causes of sediment concentration affecting the flow mea-surement accuracy of the integrated plate gate are analyzed. The results show that the deviation of flow gauging between the integrated gates and the cut-throat flume is enlarge when the sediment content of channel water gradually increases. All the elements of the velocity distribution, turbulent kinetic energy, sediment concentration and particle size have effect on the accuracy of ultrasonic flow meter in the measuring box. With the increase of sediment concentration, the turbulent kinetic energy decreases but the velocity distribution have no obvious change in the metering box. Therefore, the sediment concentration has a certain impact on the flow measurement accuracy of the integrated plate gate. Further, it is mainly caused by the attenuation of ultrasonic wave and the turbulent kinetic energy decreases of sediment laden water, and the relative to the velocity distribution has little influence on it.
麦文慧,王红雨,马利军,李星,柴鹏翔. 高含沙水渠道测控一体化板闸测流试验及其数值模拟[J]. 排灌机械工程学报, 2022, 40(7): 680-686.
MAI Wenhui,WANG Hongyu*,MA Lijun,LI Xing,CHAI Pengxiang. Flow gaugingtest and numerical simulation of integrated gate for measurement and control of high sediment content water channel. Journal of Drainage and Irrigation Machinery Engin, 2022, 40(7): 680-686.
