水平安装文丘里管低压湿气测量模型  

Wet Gas Measurement Model for Low Pressure Applications in Horizontal Orientated Venturi Tube

作　　者：罗翼[1] 张涛[1] 方立德[1] 

机构地区：[1]天津大学电气与自动化工程学院,天津300072

出　　处：《机械工程学报》2008年第1期7-12,共6页Journal of Mechanical Engineering

基　　金：国家高技术研究发展计划资助项目(863计划;2006AA042167)。

摘　　要：在低压高流速工况下,对文丘里管的湿气测量虚高数学模型进行理论和试验研究。由动量方程出发,推导文丘里管用于湿气测量的理论计算式。在天津大学低压油、气、水三相流试验装置上,对管径比为0.4048、0.55、0.7的文丘里管进行大量湿气试验,分析压力、滑差及液相含率对文丘里湿气测量虚高的影响,提出一个新的文丘里管低压湿气测量半经验模型公式,达到较高的测量精度。通过对不同管径比的试验数据的分析比较,得出管径比为0.55的文丘里管信号具有较小分散性的结论。In the background of low pressure condition, over reading mathematics models of Venturi tube on wet gas measurement is studied, both in theory and in experiment. Firstly, a theoretical model is deduced from the momentum equation; then, lots of experiment is done on three Venturi tubes which are different in size, the meters, with fl values of 0.404 8, 0.55 and 0.70 have been tested in Tianjin University＇s Low Pressure Wet Gas Test Facilities. The effect of pressure, slip ratio and liquid ratio to over reading of venture wet gas metering is analyzed, and a new half-experiential model of Venturi tube on wet gas measurement is put forward and proved in good precision; Finally, experiment analyzing shows that signal of the Venturi tube whose diameter ratio is 0.55 scatters least.

关 键 词：文丘里管 湿气测量 两相流 分相模型 虚高 

分 类 号：TH814[机械工程—仪器科学与技术]