摘要
为了研究涡轮流量计在脉动流量下动态特性,利用FLUENT软件对涡轮流量计内脉动流场进行仿真计算。研究中获得了流量计在不同脉动幅值和频率下的瞬时输出流量,通过正弦函数拟合获得各工况输出流量的平均值、脉动幅值和初始相位,进而对涡轮流量计幅频特性和相频特性进行了分析,幅频特性随脉动频率成线性降低的趋势,而相频特性随频率增加而增大而后趋于稳定。
In order to study the dynamic characteristics of turbine flowmeter under pulsating flow,the pulsating flow field in turbine flowmeter is simulated by FLUENT software. In the study,the instantaneous output flow of turbine flowmeter under different pulsation amplitude and frequency is obtained,and the average value,pulsation amplitude and initial phase of the output flow under different conditions are obtained by sine function fitting. Then the amplitude-frequency and phase-frequency characteristics of turbine flowmeter are analyzed. The amplitude-frequency characteristics decrease linearly with the pulsation frequency,while the phase-frequency characteristics increase with frequency and then tend to be stable.
作者
张永胜
于小丽
刘彦军
ZHANG Yongsheng;Yu Xiaoli;LIU Yanjun(Changcheng Institute of Metrology&Measurement,Beijing 100095,China)
出处
《计测技术》
2020年第4期27-30,共4页
Metrology & Measurement Technology
关键词
涡轮流量计
流体仿真
脉动流量
turbine flowmeter
flow simulation
pulsating flow
