| 李坤鹏,徐 雅,谢代梁,徐志鹏,曹松晓,胡鹤鸣.大口径超声波流量计内部流-声耦合特性仿真分析[J].电子测量与仪器学报,2020,34(7):8-14 |
| 大口径超声波流量计内部流-声耦合特性仿真分析 |
| Simulation analysis of flow-acoustic coupling characteristics of large diameter ultrasonic flowmeter |
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| DOI： |
| 中文关键词: 大口径管道 超声波流量计 流声耦合 模拟 |
| 英文关键词:large diameter pipe ultrasonic flowmeter flow-acoustic coupling mechanism simulation |
| 基金项目:国家重点研发计划(2018YFF0216001)资助项目 |
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| 中文摘要: |
| 为了探索工业用大口径水流量管道中超声波流量计的使用及其关键的流场-声场耦合机理,针对一 DN500 大口径超声
波流量计进行了流-声耦合数值模拟研究。 系统分析了大口径管道中的流场分布特性,揭示了传感器安装结构对于流场和声场
带来的综合影响,给出了声波在管道流体中的传播动力学过程,通过换能器的声压接受信号结果计算得到了大口径管道内超声
流量计模型的预估流速及计算偏差,其复杂的流-声耦合机理研究对超声波流量测量性能的提升具有重要意义。 |
| 英文摘要: |
| The study of flow-acoustic coupling mechanism is crucial to the development of large diameter ultrasonic flowmeters applied in
industrial piping systems. An ultrasonic flowmeter with an inner diameter of 500 mm is simulated, mainly focusing on the coupling
mechanism between the flow field and acoustic field. The distribution characteristics of flow field in the ultrasonic flowmeter are
analyzed. The effects on the flow field and acoustic field caused by the installing structure of transducers are revealed. The acoustic
characteristic and the acoustic pressure distribution on the transducer receiver end face are shown. The flow velocity and the system
deviation of the ultrasonic flowmeter are calculated by the difference in travel times between the downstream and the upstream
propagations. The in-depth study of complex flow-acoustic coupling mechanism has significant meanings for the improvement of
measurement performance of the ultrasonic flowmeter. |
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