作者：邵欣¹, 王涛¹, 高芦宝², 李玉川³, 韩思奇¹

作者单位：1. 天津中德应用技术大学智能制造学院，天津 300350;
2. 天津现代职业技术学院，天津 300350;
3. 天津理工大学电气电子工程学院，天津 300384

关键词：超声波气体流量计;过渡区;整流器;计算流体力学

摘要：

随着煤改气政策的推动，我国民用天然气的使用量增长迅速，而如何提高流量计的测量精度对于降低运输成本有着重要的意义。采用计算流体力学（CFD）进行仿真，建立单弯管上游阻流件模型。分析管网中转捩过渡区域流场的流动机理，并对现有的商用整流器进行优化改进。考察雷诺数、超声波气体流量计安装位置以及孔径深度对于测量精度的影响。结果表明，安装的整流器可以改善管道内流场的速度分布，优化整流器能够缩短流量计的安装位置，整流器的最佳厚度为0.25D。研究结果为工业中提高超声波气体流量计的测量精度提供重要的理论意义和应用价值。

Study on flow field detection and optimization in transition zone of ultrasonic gas flowmeter based on CFD
SHAO Xin¹, WANG Tao¹, GAO Lubao², LI Yuchuan³, HAN Siqi¹
1. Intelligent Manufacturing College, Tianjin Sino-German University of Applied Sciences, Tianjin 300350, China;
2. Tianjin Modern Vocational Technology College, Tianjin 300350, China;
3. School of Electrical and Electronic Engineering, Tianjin University of Technology, Tianjin 300384, China
Abstract: With the promotion of coal-to-gas policy, the consumption of civil natural gas in China is increasing rapidly, and how to improve the measurement accuracy of flowmeter is of great significance to reduce the transportation cost. Computational fluid dynamics (CFD) was used for simulation, the upstream choke model of single elbow pipe was established. The flow mechanism of transition region flow field in pipeline network was analyzed, and the existing commercial rectifier was optimized. The effects of Reynolds number, installation location of ultrasonic gas flowmeter and aperture depth on measurement accuracy were investigated. The results show that the installation of the flow Conditioner can improve the velocity distribution of the flow field in the pipeline, optimize the flow Conditioner can shorten the installation position of the flowmeter, the optimum thickness of the flow Conditioner is 0.25D. The research results provide important theoretical significance and application value for improving the measurement accuracy of ultrasonic gas flowmeter in industry.
Keywords: ultrasonic gas flowmeter;transition area;flow conditioner;CFD
2021, 47(10):114-122  收稿日期: 2021-01-23;收到修改稿日期: 2021-02-19
基金项目: 国家自然科学基金（62073240）；国家级大学生创新创业训练计划项目（202112105003）；天津市教委科研计划项目（2020KJ087）；天津市企业科技特派员项目（20YDTPJC00620）；天津中德应用技术大学自制设备项目（ZDZY2020-01C）；天津中德应用技术大学校级课题（zdkt2020-005）
作者简介: 邵欣（1980-），男，天津市人，副教授，博士，研究方向为智能控制技术
参考文献
[1] 郭秋麟, 武娜, 闫伟, 等. 深层天然气资源评价方法[J]. 石油学报, 2019, 40(4): 383-394
[2] 李泽红, 李静楠, 杨洋, 等. 中俄天然气贸易安全格局与态势[J]. 资源科学, 2018, 40(11): 2143-2152
[3] 翟义然, 赵勇, 刘义, 等. 工业超声波燃气表内部结构设计的气体流动仿真研究[J]. 中国测试, 2020, 46(2): 87-90
[4] 樊洁云, 张亮, 方立德, 等. 烟气超声流量计时间测量准确度校准方法研究[J]. 中国测试, 2020, 46(2): 28-33
[5] 孙彦招, 张涛, 郑丹丹, 等. 气体超声流量计换能器附近回流影响声束研究[J]. 仪器仪表学报, 2018, 39(4): 53-60
[6] QIN L, HU L, MAO K, et al. Flow profile identification with multipath transducers[J]. Flow Measurement and Instrumentation, 2016, 52: 148-156
[7] ZHAO H, PENG L, TAKAHASHI T, et al. CFD-Aided investigation of sound path position and orientation for a dual-path ultrasonic flowmeter with square pipe[J]. IEEE Sensors Journal, 2015, 15(1): 128-137
[8] LIU E, TAN H, PENG S. A CFD simulation for the ultrasonic flow meter with a header[J]. Tehnicki Vjesnik-Technical Gazette, 2017, 24(6): 1797-1801
[9] 陈利琼, 谢虹雅, 孙靖云, 等. 基于CFD的气体超声流量计计量准确性研究[J]. 中国测试, 2019, 45(7): 87-91
[10] 刘桂雄, 陈国宇, 谭文胜. 流量测量流动调整器结构与发展趋势分析[J]. 中国测试, 2020, 46(3): 12-16
[11] 万勇, 陈国宇, 冯良锋, 等. CFD流动调整器性能评价方法研究[J]. 中国测试, 2016, 42(6): 33-36
[12] 李存标. 关于转捩边界层中流向涡的产生[J]. 物理学报, 2001(01): 182-184
[13] 陈林, 唐登斌, 刘超群. 转捩边界层中次生流向涡演化的数值研究[J]. 应用数学和力学, 2011, 32(4): 428-436
[14] TANG X. A fault-tolerant flow measuring method based on PSO-SVM with transit-time multipath ultrasonic gas flowmeters[J]. IEEE Transactions on Instrumentation and Measurement, 2018, 67(5): 992-1005
[15] 韩思奇, 邵欣, 檀盼龙, 等. 基于FLUENT下双声道超声波流量计最优声道研究[J]. 中国测试, 2018, 44(8): 140-146