应用于方管的超声波流量计数值积分方法分析
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摘要
针对应用于方形管道的多声道超声波流量计流量积分方法研究较少的问题,提出3种适用于多声道超声波流量计计算方形管道流量时的数值积分方法,并推算了各自的声道高度和权重系数.应用计算流体力学仿真软件FLUENT分别对3种积分方法的准确性进行仿真验证,得到高斯-勒让德积分法的积分准确性明显优于其他2种积分方法,并且随着声道数量的增加,测量误差逐渐减小,实际应用中多声道超声波流量计应选择4~8个声道数量对流体的流速进行测量.
In view of the problem of few researches on the flow integral method of Multi-path ultrasonic flow meter applied to the square pipe, three numerical integration methods for the calculation of square pipe flow rate using Multi-path ultrasonic flowmeter are proposed, and the pairing sensor positions and weight coefficients are calculated. Computational fluid dynamics simulation software FLUENT is used to verify the accuracy of the three integral methods. The integral accuracy of Gauss-Legendre integral method is obviously superior to the other two methods, and as the number of channels increases, the measurement error decreases gradually. In practical application, 4-8 channels shall be selected to measure the flow velocity of the fluid.
In view of the problem of few researches on the flow integral method of Multi-path ultrasonic flow meter applied to the square pipe, three numerical integration methods for the calculation of square pipe flow rate using Multi-path ultrasonic flowmeter are proposed, and the pairing sensor positions and weight coefficients are calculated. Computational fluid dynamics simulation software FLUENT is used to verify the accuracy of the three integral methods. The integral accuracy of Gauss-Legendre integral method is obviously superior to the other two methods, and as the number of channels increases, the measurement error decreases gradually. In practical application, 4-8 channels shall be selected to measure the flow velocity of the fluid.
引文
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[2]贺胜,彭黎辉,仲里敏.基于CFD的超声波流量计最优声道位置研究[J].仪器仪表学报,2009,30(4):853-856.
[3]孟丹丹.多声道管段式超声波流量计[J].仪器仪表用户,2016,23(8):24-16.
[4]张皎丹,郑丹丹,张涛,等.多声道超声流量计数值积分方法优化[J].化工自动化及仪表,2014,42(2):144-147.
[5]胡鹤鸣,王池,孟涛.多声路超声流量计积分方法及其准确度分析[J].仪器仪表学报,2010,31(6):1218-1223.
[6]李庆扬,王能超,易大义.数值分析[M].北京:清华大学出版社,2008.
[7]王尊正.数值分析基本教程[M].哈尔滨:哈尔滨工业大学出版社,1993.
[8]王瑞金,张凯,王刚.Fluent技术基础与应用实例[M].北京:清华大学出版社,2007.
[9]李鹏飞,徐敏义,王飞飞.精通CFD工程仿真与案例实战[M].北京:人民邮电出版社,2011.
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