Author(s): Yi Zhou; Xuechun Zhang; Yuhui Yang; Yu Han
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Keywords: No keywords
Abstract: In order to study the flow-measuring device with high precision and simple structure, spindle-shaped flowmeasuring columns with different proportions were designed based on cylinder flow-measuring columns. The water metering performance of a spindle-shaped water metering column in a U-shaped channel was studied using numerical simulation and experimental study. Based on numerical simulation, three spindle-shaped water columns with different proportions are designed and simulated under different working conditions. Observe the three-dimensional flow pattern of water flow in a U-shaped channel, and analyze the head loss of spindle-shaped water column with different proportions. Based on the hydraulic characteristics of the spindle-shaped water column, the flow measuring mechanism is deduced, and finally, it is determined that the spindle-shaped water column with an aspect ratio of 2.5 has better water measuring performance. Furthermore, experimental studies were conducted in a U-shaped channel to determine the water depth extraction point during spindle water metering and to verify the hydraulic characteristics and water metering performance of spindle water metering. To explore whether the device also works well in other channels, verification tests were also carried out in the rectangular open channel. The results show that it is suitable for different cross-section types of open channels, which provides a reference basis for meeting the metering requirements of different open channels in actual projects.
Year: 2022