Study on the influence of reflecting channel position on flow velocity characteristics of ultrasonic heat meter

[摘要] In this paper, LES (Large eddy simulation) method is used to study the influence of different channel positions on the flow velocity of the ultrasonic heat meter, and the variation of the average linear velocity of different channel with time is researched. Through the calculation results, the velocity characteristics of 11 channels of the U-shaped reflecting device ultrasonic heat meter are analysed. The results show that the vortex behind the reflecting cylinder affects the velocity distribution in the channel. Statistical analysis shows that the linear average velocity in different positions of the channel fluctuates with time, but the fluctuation amplitude is basically the same. The average linear velocity asymmetry of reflecting channel far from the vortex zone is smaller, and the deviation of the average velocity is less than that of the average velocity, therefore, the distribution of the velocity is more reasonable.

[发布机构] Shandong Jiaotong University, Jinan, China^1

[效力级别] 材料工程

[关键词] Average velocity;Calculation results;Channel position;Fluctuation amplitudes;Heat meters;Linear averages;Linear velocity;Reflecting channel