单孔堵塞对均速管流量计测量精度的影响  

Effect of Annubar Flowmeter's Measure Precision on a Blocked Hole

作　　者：张东飞[1] 苏中地[1] 何馨雨[1] 

机构地区：[1]中国计量学院计量测试工程学院,杭州310018

出　　处：《浙江科技学院学报》2007年第4期265-268,284,共5页Journal of Zhejiang University of Science and Technology

摘　　要：对均速管流量计单孔堵塞后的内部流动进行数值模拟,得到压差,然后算出流量系数并与正常结果相比较,最后分析孔堵塞时对测量精度的影响。计算中引用k-ε湍流模型,应用有限体积法对控制方程离散和求解,在前处理软件GAMBIT中将计算区域划分为236多万个计算单元。Flow inside blocked Annubar flowmeter is numerically simulated to get pressure differential. Then the flow coefficient can be calculated out and compared with the normal data. At last the analysis process of the measure errors is given. A k-e based model of turbulence is applied to solve the turbulent problem. Variational form of the numerical system is discretized with the finite volume method. The flow fields is divided to more than 2.36 millon computing elements by GAMBIT.

关 键 词：均速管流量计 压差 流量系数 测量误差 

分 类 号：TH814[机械工程—仪器科学与技术] O357.5[机械工程—精密仪器及机械]