| Cite this article: | 广彗冰,王健,李泽森,等.淤积工况下薄壁三角堰流量特征研究[J].灌溉排水学报,2022,(10):-. |
| guang hui bing,wang jian,li ze sen,et al.淤积工况下薄壁三角堰流量特征研究[J].灌溉排水学报,2022,(10):-. |
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| Flow Characteristics of Triangular Sharp-Crested Weir in Deposition |
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guang hui bing1,2, wang jian3,4,4,2, li ze sen1,2, cao bo zhao1,2, liu chao1,2, wangkanghong5
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1.Institute of Soil and Water Conservation, Northwest A&2.F University;3.School of Natural Resources and Environment, Northwest A&4.amp;5.Soil and water conservation station in Hancheng
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| Abstract: |
| 【Objective】The objective was exploring the influence of deposition to measure flow rate in triangular sharp-crested weir.【Method】This study simulated the flow field under 9 different conditions from no deposition to full deposition with mature computational fluid dynamics FLUENT 19.0 and lab experiments to analyze flow rate, water level and velocity variation.【Result】(1). It drew the conclusion that simulation results were reliable as simulated flow was consistent with theoretical flow and measured flow, and velocity distribution in channel conformed to the general law of velocity distribution (2) When theoretical flow was 0.2210 L/s, simulated and measured flow fluctuated disorderly with thickening of deposition, and fluctuation range was -0.45% to 8.60% of theoretical flow. (3) When theoretical flow was 0.2210 L/s, comparing free-surface profiles in the conditions of deposition and no deposition, the simulated and measured profiles occurred different degree of water level accumulation near weir plate, and the height rose in volatility with the increase of deposition. 【conclusion】Based on simulation results are accurate and reliable, research shows that the water level in front of weir rises because of deposition, and the flow capacity of triangular sharp-crested weir increases. However, as the flow formula lacks the correction parameters to adapt to this change, theoretical flow in production will be small. |
| Key words: triangular sharp-crested weir; deposition; computational fluid dynamics; flow rate; velocity; |
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