差压式流量计测量脉动流量方法研究  

Research on Method of Measuring Pulsating Flowrate with Differential Pressure Flowmeter

作　　者：张永胜[1] 张毅治 刘彦军[1] ZHANG Yong-sheng;ZHANG Yi-zhi;LIU Yan-jun(Changcheng Institute of Metrology&Measurement,Beijing 100095,China)

机构地区：[1]北京长城计量测试技术研究所,北京100095

出　　处：《计量学报》2020年第4期430-433,共4页Acta Metrologica Sinica

摘　　要：利用脉动流动工况下差压式流量计理论模型,给出了通过双路差压计算瞬时脉动流量的算法,并利用FLUENT软件对文丘里管内流场进行仿真计算,对脉动流量计算方法进行验证。仿真结果表明,单路压差计算脉动流量,由于遗漏流量导数项可产生很大测量误差,最大误差甚至可达100%;而通过双路差压计算脉动流量,可有效消除流量导数项影响,算例中最大误差降低至5%左右。Based on the theoretical model of differential pressure flowmeter under the condition of pulsating flow,the algorithm of calculating instantaneous pulsating flow by double-channel differential pressure is given.The flow field in Venturi tube is simulated by FLUENT software,and then the calculation method of pulsating flow is verified.The simulation results show that the maximum error can be up to 100%when calculating the fluctuating flow by single-channel pressure,and the maximum error can be reduced to about 5%when calculating the fluctuating flow by double-channel differential pressure.

关 键 词：计量学 脉动流量 流体仿真 双路差压流量计 

分 类 号：TB937[一般工业技术—计量学]