基于CFD的双声路超声水表研究

基于时差法的超声水表在中、大口径的水流量测量中,存在超声波信号易受外界干扰以及小流量的测量重复性较差等问题.针对以上问题,本文设计了具有缩径结构的管路模型.其次,通过CFD数值仿真研究了缩径管路模型在低流速下的流场分布情况.最后对本文设计的双声路超声水表样机进行了相关试验.试验结果表明,本文设计的管路模型有效提高了超声...

Study on Ultrasonic Water Flow Meter with Double-channel Based on CFD

Ultrasonic water meter is vulnerable to external disturbance and has the poor repeatability at low flowrate measurement in the large and medium pipeline.In order to solve the above problems,the research on the double-channel ultrasonic water flow meter based on time difference method is studied.Firstly,this paper designs reducing pipes.Secondly,the flow field of the reducing pipes at low flowrate is studied by CFD numerical simulation.Finally,The experiments on the prototype of the double-channel ultrasonic water flowmeter are studied.The results show that the pipe model can improve the measurement repeatability and reliability in small flow experiments.The performance of the prototype meets the requirements.