Large eddy simulation study on flow characteristics of ultrasonic heat meter at low Reynolds number

2nd International Conference on Mechanical Engineering and Applied Composite Materials

机械制造;材料工程

Liu, Yonghui^1 ; Yi, Fengyan^1 ; Zhou, Changfeng^1 ; Tao, Lili^1

Shandong Jiaotong University, Jinan, China^1

关键词: Calculation results;    Cylindrical reflectors;    Flow charac-teristics;    Heat meters;    Low Reynolds number;    Measurement accuracy;    Velocity gradients;    Velocity variations;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/544/1/012060/pdf
DOI  :  10.1088/1757-899X/544/1/012060

来源: IOP

【 摘 要 】

Ultrasonic heat meter is widely used in heat metering, and its measurement accuracy depends on the flow characteristics of the reflected channel. In this paper, LES (Large Eddy Simulation) method is used to calculate the flow field of the ultrasonic heat meter at low Reynolds number. Through the analysis of the flow field, it is shown that the velocity gradient near the cylindrical reflector is larger, especially at the tail of the first cylindrical reflector; the eddy formed by the flow can scour the reflecting surface and prevent scaling; the average linear velocity over time of the reflecting channel is obtained by the calculation results. The range of velocity variation is 0.609%.