| 引用本文: | 蔡守华,盛媛茜,沈亚龙.偏心文丘里流量计的试验与数值模拟研究 [J].灌溉排水学报,0,():-. |
| CAI Shouhua,SHENG Yuanqian,SHEN Yalong.偏心文丘里流量计的试验与数值模拟研究 [J].灌溉排水学报,0,():-. |
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| 摘要: |
| 【目的】传统的文丘里流量计用于低压管道输水灌溉系统测流时,上游侧容易产生淤积,因而影响测流精度。为克服这一缺陷,本文提出一种新型偏心文丘里测流装置。【方法】以直管段管径DN100、缩径比为0.35的偏心文丘里管为例,分别进行了实际测流试验及基于FLOW-3D的数值模拟研究,并进行了对比分析。【结果】结果表明：数值模拟的流出系数与试验流出系数基本一致,利用FLOW-3D进行偏心文丘里流量计模拟分析是可行的；偏心文丘里流量计流出系数的相对误差度小于5%,能满足低压管道输水灌溉量水要求。【结论】偏心文丘里流量计在低压管道输水灌溉量水领域有较好的应用前景。 |
| 关键词: 管道量水;偏心文丘里管;数值模拟;流出系数 |
| DOI： |
| 分类号:S274.4 |
| 基金项目:江苏省水利科技术项目 |
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| Experimental Study and Numerical Simulation on Eccentric Venturi flowmeter |
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CAI Shouhua, SHENG Yuanqian, SHEN Yalong
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College of Hydraulic Science and Engineering,Yangzhou University
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| Abstract: |
| 【Objectives】When the traditional Venturi flow meter is used for water measurement in low-pressure pipeline irrigation system, the upstream side is prone to silting, which affects the accuracy of flow measurement. To overcome this defect, a new type of eccentric Venturi current measuring device is proposed. 【Method】A flow-3D numerical simulation model was established for eccentric venturi pipes with straight section diameter DN100 and diameter reduction ratio 0.35,and a comparative analysis was conducted with the real FLOW test. 【Result】The results show that the discharge coefficient of the numerical model is basically consistent with the discharge coefficient of the real FLOW test, which proves that it is feasible to use flow-3D to simulate an eccentric Venturi.The relative error degree of eccentric Venturi flowmeter is less than 5%, which can meet the requirement of irrigation pipe flow measurement.【Conclusion】The eccentric Venturi flowmeter has a good application prospect in the field of low-pressure pipeline irrigation system. |
| Key words: pipe flow measurement; eccentric Venturi tube; Numerical simulation; discharge coefficient |
