作者：张嘉祥

作者单位：陕西省计量科学研究院, 陕西 西安 710048

关键词：层流流量计; 数学模型; 流量系数; 非线性误差; 粘度; 密度

摘要：

为解决气体层流流量计在不同性质气体使用和标定中存在的换算问题,以及流量与差压的非线性关系,建立了适用于各种气体的层流流量计流量计算数学模型,提出层流流量计的流量计算不仅与气体的粘度有关,同时与气体的密度有关,引入双流量系数及标定方法。通过试验和比对验证,表明流量计的非线性误差减小,同一台流量计对不同气体有显著的通用性。

Research on flow calculation mathematic model and calibration of laminar flow meter

ZHANG Jia-xiang

Shaanxi Institute of Metrology and Science, Xi'an 710048, China

Abstract: In order to solve the conversion problems, which exist in the different nature gases in the use and calibration by laminar gas flow meter, and the non-linear relationship between flow and pressure, the mathematical model of laminar gas flow meter was established for a variety of gas.Then the flow of laminar flow meter not only related with the viscosity of gases, but also the density of the gas.At last, dual-flow coefficient and calibration method were introduced.After testing and verification, the results show that the non-linear error of the flow meter reduces, and the same flow meter has the same function for different gases.

Keywords: Laminar flow meter; Mathematical model; Coefficient of flow; Non-linear error; Viscosity; Density

2009, 35(5): 14-17  收稿日期: 2009-4-11;收到修改稿日期: 2009-6-19

基金项目: 

作者简介: 张嘉祥(1957-),男,陕西西安市人,高级工程师,主要从事流量计量、测试研究工作。

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