梯形喉口无喉道量水槽水力性能分析

冉聃颉; 王文娥; 胡笑涛; 史利洁

doi:10.14042/j.cnki.32.1309.2018.02.011

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梯形喉口无喉道量水槽水力性能分析

冉聃颉, 王文娥, 胡笑涛, 史利洁

文章导航 > 水科学进展 > 2018 > 29(2): 236-244

冉聃颉, 王文娥, 胡笑涛, 史利洁. 梯形喉口无喉道量水槽水力性能分析[J]. 水科学进展, 2018, 29(2): 236-244. doi: 10.14042/j.cnki.32.1309.2018.02.011

引用本文:

冉聃颉, 王文娥, 胡笑涛, 史利洁. 梯形喉口无喉道量水槽水力性能分析[J]. 水科学进展, 2018, 29(2): 236-244. doi: 10.14042/j.cnki.32.1309.2018.02.011

RAN Danjie, WANG Wene, HU Xiaotao, SHI Lijie. Analyzing hydraulic performance of trapezoidal cutthroat flumes[J]. Advances in Water Science, 2018, 29(2): 236-244. doi: 10.14042/j.cnki.32.1309.2018.02.011

Citation:

RAN Danjie, WANG Wene, HU Xiaotao, SHI Lijie. Analyzing hydraulic performance of trapezoidal cutthroat flumes[J]. Advances in Water Science, 2018, 29(2): 236-244. doi: 10.14042/j.cnki.32.1309.2018.02.011

梯形喉口无喉道量水槽水力性能分析

doi: 10.14042/j.cnki.32.1309.2018.02.011

1.
西北农林科技大学旱区农业水土工程教育部重点实验室, 陕西杨凌 712100;
2.
School of Life Sciences, Faculty of Science, University of Technology Sydney, NSW 2007, Australia

基金项目: 国家重点研发计划资助项目（2016YFC0400203）；公益性行业（农业）科研专项经费资助项目（201503125）

详细信息

作者简介:
冉聃颉(1993-),女,重庆人,博士研究生,主要从事水力学及河流动力学方面研究。E-mail:r18629429253@gmail.com

通讯作者:
王文娥,E-mail:wangwene@nwsuaf.edu.cn

中图分类号: S274.4

Analyzing hydraulic performance of trapezoidal cutthroat flumes

1.
Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A & F University, Yangling 712100, China;
2.
School of Life Sciences, Faculty of Science, University of Technology Sydney, NSW 2007, Australia

摘要: 以解决灌区普遍存在的通过增大水头损失来提高测流精度的问题为目标，探究梯形喉口无喉道量水槽在末级梯形渠道中量水的适用性。基于Flow-3D软件，采用RNG k-ε紊流模型和Tru-VOF方法对梯形喉口无喉道量水槽和矩形喉口无喉道量水槽水力性能进行了数值模拟，并通过物理原型试验验证了模拟结果的合理性。研究结果表明：梯形喉口无喉道量水槽测流过程中弗劳德数沿程呈单峰分布，在喉口下游附近出现临界流且喉口上游弗劳德数均小于0.5，满足灌区量水要求；测流过程中，最大流速位置随着量水槽边界变化而变化；对喉口收缩比相同的矩形喉口和梯形喉口无喉道量水槽测流精度、水头损失比较得出，梯形喉口有效改善了小流量时测流误差和大流量时的水头损失。
- 梯形喉口 /
- 无喉道量水槽 /
- 流速分布 /
- 测流精度 /
- 能量损失 /
- Flow-3D
Abstract: Increasing water head lose to improve the accuracy of flow measurement is a ubiquitous problem in irrigation districts. This research aims to solve the problem. In this context, this research probed into the applicability of the new-type trapezoidal cutthroat flumes in measuring discharge of last trapezoidal channels. Based on Flow-3D, RNG k-ε turbulent model and Tru-VOF technique, numerical simulation was carried out to analyze hydraulic performance of trapezoidal cutthroat flume and rectangular cutthroat flume. Meanwhile, rationality of simulation results was verified by physical prototype test. Results indicated that the distribution of Froude number of trapezoidal cutthroat flume was unimodal; the critical flow appeared near the throat section and the Froude number was less than 0.5 around the upper throat, which could meet the water measurement requirement in irrigation districts; the position of maximum flow rate varied with the change of the flume's boundary. Compared with the rectangular cutthroat flume, both the head loss of trapezoidal cutthroat flume when the flow was large and the measurement accuracy when the flow was small was significantly improved.
- trapezoidal throat /
- cutthroat flumes /
- velocity distribution /
- flow measurement accuracy /
- head loss /
- Flow-3D

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梯形喉口无喉道量水槽水力性能分析

doi: 10.14042/j.cnki.32.1309.2018.02.011

1. 西北农林科技大学旱区农业水土工程教育部重点实验室, 陕西杨凌 712100;

2. School of Life Sciences, Faculty of Science, University of Technology Sydney, NSW 2007, Australia

基金项目: 国家重点研发计划资助项目（2016YFC0400203）；公益性行业（农业）科研专项经费资助项目（201503125）

作者简介:
冉聃颉(1993-),女,重庆人,博士研究生,主要从事水力学及河流动力学方面研究。E-mail:r18629429253@gmail.com

通讯作者: 王文娥,E-mail:wangwene@nwsuaf.edu.cn

收稿日期: 2017-07-06
刊出日期: 2018-03-25

中图分类号: S274.4

关键词:

摘要: 以解决灌区普遍存在的通过增大水头损失来提高测流精度的问题为目标，探究梯形喉口无喉道量水槽在末级梯形渠道中量水的适用性。基于Flow-3D软件，采用RNG k-ε紊流模型和Tru-VOF方法对梯形喉口无喉道量水槽和矩形喉口无喉道量水槽水力性能进行了数值模拟，并通过物理原型试验验证了模拟结果的合理性。研究结果表明：梯形喉口无喉道量水槽测流过程中弗劳德数沿程呈单峰分布，在喉口下游附近出现临界流且喉口上游弗劳德数均小于0.5，满足灌区量水要求；测流过程中，最大流速位置随着量水槽边界变化而变化；对喉口收缩比相同的矩形喉口和梯形喉口无喉道量水槽测流精度、水头损失比较得出，梯形喉口有效改善了小流量时测流误差和大流量时的水头损失。

English Abstract

Analyzing hydraulic performance of trapezoidal cutthroat flumes

1. Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A & F University, Yangling 712100, China;

2. School of Life Sciences, Faculty of Science, University of Technology Sydney, NSW 2007, Australia

Received Date: 2017-07-06
Publish Date: 2018-03-25

Keywords:

Abstract: Increasing water head lose to improve the accuracy of flow measurement is a ubiquitous problem in irrigation districts. This research aims to solve the problem. In this context, this research probed into the applicability of the new-type trapezoidal cutthroat flumes in measuring discharge of last trapezoidal channels. Based on Flow-3D, RNG k-ε turbulent model and Tru-VOF technique, numerical simulation was carried out to analyze hydraulic performance of trapezoidal cutthroat flume and rectangular cutthroat flume. Meanwhile, rationality of simulation results was verified by physical prototype test. Results indicated that the distribution of Froude number of trapezoidal cutthroat flume was unimodal; the critical flow appeared near the throat section and the Froude number was less than 0.5 around the upper throat, which could meet the water measurement requirement in irrigation districts; the position of maximum flow rate varied with the change of the flume's boundary. Compared with the rectangular cutthroat flume, both the head loss of trapezoidal cutthroat flume when the flow was large and the measurement accuracy when the flow was small was significantly improved.

冉聃颉, 王文娥, 胡笑涛, 史利洁. 梯形喉口无喉道量水槽水力性能分析[J]. 水科学进展, 2018, 29(2): 236-244. doi: 10.14042/j.cnki.32.1309.2018.02.011

引用本文:

冉聃颉, 王文娥, 胡笑涛, 史利洁. 梯形喉口无喉道量水槽水力性能分析[J]. 水科学进展, 2018, 29(2): 236-244. doi: 10.14042/j.cnki.32.1309.2018.02.011

Citation:

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梯形喉口无喉道量水槽水力性能分析

doi: 10.14042/j.cnki.32.1309.2018.02.011

作者简介: 冉聃颉(1993-),女,重庆人,博士研究生,主要从事水力学及河流动力学方面研究。E-mail:r18629429253@gmail.com

通讯作者: 王文娥,E-mail:wangwene@nwsuaf.edu.cn

Analyzing hydraulic performance of trapezoidal cutthroat flumes

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出版历程

梯形喉口无喉道量水槽水力性能分析

doi: 10.14042/j.cnki.32.1309.2018.02.011

1. 西北农林科技大学旱区农业水土工程教育部重点实验室, 陕西杨凌 712100; 2. School of Life Sciences, Faculty of Science, University of Technology Sydney, NSW 2007, Australia

作者简介: 冉聃颉(1993-),女,重庆人,博士研究生,主要从事水力学及河流动力学方面研究。E-mail:r18629429253@gmail.com

通讯作者: 王文娥,E-mail:wangwene@nwsuaf.edu.cn

English Abstract

Analyzing hydraulic performance of trapezoidal cutthroat flumes

1. Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A & F University, Yangling 712100, China; 2. School of Life Sciences, Faculty of Science, University of Technology Sydney, NSW 2007, Australia

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作者简介:
冉聃颉(1993-),女,重庆人,博士研究生,主要从事水力学及河流动力学方面研究。E-mail:r18629429253@gmail.com

通讯作者:
王文娥,E-mail:wangwene@nwsuaf.edu.cn

1. 西北农林科技大学旱区农业水土工程教育部重点实验室, 陕西杨凌 712100;

2. School of Life Sciences, Faculty of Science, University of Technology Sydney, NSW 2007, Australia

作者简介:
冉聃颉(1993-),女,重庆人,博士研究生,主要从事水力学及河流动力学方面研究。E-mail:r18629429253@gmail.com

1. Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A & F University, Yangling 712100, China;

2. School of Life Sciences, Faculty of Science, University of Technology Sydney, NSW 2007, Australia