作者：翟义然^1,2, 赵勇², 胡小川¹, 刘勋², 刘义², 张彬¹

作者单位：1. 四川大学电子信息学院, 四川 成都 610065;
2. 成都千嘉科技有限公司, 四川 成都 610211

关键词：超声波;气体流速;CFX仿真;燃气表

摘要：

针对超声波燃气表的原参考设计流道和新改进设计流道的气体流动特性,利用流体动力学仿真软件ANSYS中的CFX软件进行仿真计算和分析。获得在9个不同的流量点上两种超声波燃气表的流道内气体流动仿真数据,包括两种流道的整体流道内及超声波测量流道部分斜截面的气体流动速度分布。对仿真结果分析显示,两种流道在性能上基本一致,但新改进流道在大流量和中流量上气体流动速度分布性能比原参考设计流道性能更好;另外,与整体流道内气体流动速度分布相比,气体流动速度在超声波测量斜截面分布相对更均匀和稳定。对采用新改进流道设计制造的超声波燃气表样机进行测试,准确度达到设计要求,且样机的测量误差稳定。

Simulation study of gas flowing channel of ultrasonic gas meter based on CFX software

ZHAI Yiran^1,2, ZHAO Yong², HU Xiaochuan¹, LIU Xun², LIU Yi², ZHANG Bin¹

1. College of Electronics and Information Engineering, Sichuan University, Chengdu 610065, China;
2. Chengdu Qianjia Technology Co., Ltd., Chengdu 610211, China

Abstract: The gas fluid dynamics of an originally suggested flowing channel and an improved flowing channel were simulated by the CFX software of ANSYS. Gas flowing velocities at 9 typical flow points were calculated and analyzed, including the gas velocity distribution of both the whole flowing channel and the oblique section of ultrasonic measurement. The simulation results indicate that the two channels are almost the same in performance. But the improved channel is better in gas velocity distribution at maximal and middle flowing points. Moreover, the simulation results show that, compared with the gas velocity distribution inside the whole channel, the oblique section where ultrasonic wave passes through is more uniform and stable. The test accuracy of an ultrasonic gas meter, a prototype with the improved flowing channel meets the design requirements and the measuring error is stable.

Keywords: ultrasonic;gas velocity;CFX simulation;gas meter

2016, 42(5): 135-139  收稿日期: 2015-11-17;收到修改稿日期: 2015-12-12

基金项目: 

作者简介: 翟义然(1973-),男,河北承德市人,高级工程师,博士,主要从事信息与信号处理方面的研究。

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