长流道式直线型沉沙池结构优化与数值模拟

doi:10.11988/ckyyb.20200376

院报 ›› 2021, Vol. 38 ›› Issue (6): 67-71.DOI: 10.11988/ckyyb.20200376

长流道式直线型沉沙池结构优化与数值模拟

胡松可^1,2, 李文昊^1,2, 杨广^1,2, 刘宁宁^1,2, 金瑾^1,2

1.石河子大学水利建筑工程学院,新疆石河子 832000;
2.石河子大学现代节水灌溉兵团重点实验室,新疆石河子 832000

收稿日期:2020-04-29 修回日期:2020-07-20 出版日期:2021-06-01 发布日期:2021-06-10
通讯作者: 李文昊(1988-),男,满族,内蒙古赤峰人,实验师,博士研究生,研究方向为节水灌溉理论与技术。E-mail:lwh8510012@163.com
作者简介:胡松可(1993-),男,河南商水人,硕士研究生,研究方向为水力学。E-mail:304239525@qq.com
基金资助:
国家重点研发计划课题(2017YFC0403205)

Structural Optimization and Numerical Simulation of Long-channel Linear Sedimentation Basin

HU Song-ke^1,2, LI Wen-hao^1,2, YANG Guang^1,2, LIU Ning-ning^1,2, JIN Jin^1,2

1. College of Water Conservancy and Engineering,Shihezi University, Shihezi 832000, China;
2. Key Laboratory of Modern Water Saving Irrigation Corps,Shihezi University, Shihezi 832000, China

Received:2020-04-29 Revised:2020-07-20 Online:2021-06-01 Published:2021-06-10

摘要/Abstract

摘要： 沉沙池是保障滴灌系统正常运行的重要设施之一,但灌溉期池内水沙“固液”耦合过程比较复杂,且难以通过单一物理模型进行结构优化。为进一步提高滴灌系统沉沙效率,设计了长流道直线型沉沙池;采用物理试验与数值模拟相结合的方式,研究有无调流板和不同调流板角度对池内水沙运动规律的影响。结果表明:Fluent软件可准确模拟池内“固液”耦合过程;后池设计的调流板起到了消能、降速和提高沉沙率的作用;相较于无调流板,有调流板时后池流速可降低70%以上,沉沙率提高12%以上;且60°倾角调流板池内流速最低,沉沙率最高,出口含沙量最低为1.12 g/L,沉沙率平均可达到71.26%。研究可为优化水工结构、提高沉沙池工作效率提供一定的技术支撑。

关键词: 沉沙池, 泥沙特性, 数值模拟, 调流板, 沉沙率

Abstract: Desilting basin is one of the important facilities to ensure the normal operation of drip irrigation system. However, the solid-liquid coupling process of water and sediment in the basin during irrigation is complex, and it is difficult to optimize the structure by a single physical model. In order to boost the deposit efficiency of drip irrigation system, we designed a long channel straight-line desilting basin. Through physical experiment and numerical simulation, we examined the influences of flow-adjusting board and the angle of the flow-adjusting board on flow and sediment movement. Results manifest that the solid-liquid coupling process in the basin can be simulated accurately by Fluent software; the flow-adjusting board designed in the back basin plays the role of energy dissipation, speed reduction and improvement of sediment settling rate by reducing the flow velocity by above 70% and enhancing the sediment setting rate by over 12% compared with that in the absence of flow-adjusting board. In addition, when the inclined angle of flow-adjusting board is 60°, the flow velocity in the basin drooped to the lowest, while sedimentation rate hit the highest; the minimum sediment concentration at the outlet was 1.12 g/L, and the sedimentation rate averaged at 71.26%. The research findings offer technical support for optimizing hydraulic structure and improving the efficiency of desilting basin.

Key words: sedimentation basin, sediment characteristics, numerical simulation, adjusting-flow board, sediment settling rate

中图分类号:

TV15

胡松可, 李文昊, 杨广, 刘宁宁, 金瑾. 长流道式直线型沉沙池结构优化与数值模拟[J]. 院报, 2021, 38(6): 67-71.

HU Song-ke, LI Wen-hao, YANG Guang, LIU Ning-ning, JIN Jin. Structural Optimization and Numerical Simulation of Long-channel Linear Sedimentation Basin[J]. Journal of Yangtze River Scientific Research Institute, 2021, 38(6): 67-71.

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长流道式直线型沉沙池结构优化与数值模拟

Structural Optimization and Numerical Simulation of Long-channel Linear Sedimentation Basin

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