基于CFD的传感器体积对旋进旋涡流量计的影响  

Influence of sensor volume on vortex precession flowmeter based on CFD

作　　者：沈春根[1] 金昆 朱云明[1] 胡尊豪 郭二廓[1] SHEN Chungen;JIN Kun;ZHU Yunming;HU Zunhao;GUO Erkuo(School of Mechanical Engineering,Jiangsu University,Zhenjiang,Jiangsu 212013,China)

机构地区：[1]江苏大学机械工程学院,江苏镇江212013

出　　处：《排灌机械工程学报》2024年第9期895-899,共5页Journal of Drainage and Irrigation Machinery Engineering

基　　金：江苏省自然科学基金面上资助项目(BK20221234)。

摘　　要：针对旋进旋涡流量计的精确测量,使用CFD数值模拟软件,以DN20口径的旋进旋涡流量计作为研究对象,得到了类似于钝体涡街旋涡脱落的现象,并对仿真的可行性进行了深入分析,验证了仿真工作的可靠性.分析比较低流量下不同取压点的压差,得到内流场压差变化规律,确定了DN20流体域的最佳取压点.将压电传感器置于最佳取压点后,使用音速喷嘴装置进行试验.将试验数据与仿真数据进行对比,发现两者之间存在一定的误差.分析其中原因,以小口径壳体内压电传感器自身体积较大为切入点,去除流体域内压电传感器体积,将去除压电传感器体积前后的流体域进行仿真,对结果比较分析,发现去除压电传感器体积后的流体域仿真得到的K值系数与试验值误差较小,说明压电传感器体积对内流场有一定影响,并且压电传感器的探针放置于流量计中会一定程度地增加旋进旋涡流量计的压力损失.For precise measurement of the swirling vortex flowmeter,CFD numerical simulation with a DN20 caliber was utilized as the focus.Simulation revealed a phenomenon similar to the detachment of a blunt body vortex street,confirming the reliability of simulation work.Analyzing pressure differences at various tapping points under low-flow conditions,the optimal tapping point within the DN20 fluid domain was identified.Placing a piezoelectric sensor at this optimal point,experiments were conducted using a sonic nozzle device.Comparison of experimental and simulation data showed a discrepancy.To understand this,the piezoelectric sensor large volume within the small-caliber shell was focused on.Simulating the fluid domain before and after removing the sensor′s volume,the K-value coefficient with smaller error after removal was found,indicating the sensor volume affecting the internal flow field.Additionally,placing the sensor probe within the flowmeter increased its pressure loss.

关 键 词：旋进旋涡流量计 数值模拟 压电传感器 压力损失 取压点 

分 类 号：S277.9[农业科学—农业水土工程]