Cenwei Sun, Ying Xu, Chao yuan, Tao Li, Huimin Ma, Yumeng Zhang, Xili Ba
With the development of the gas-liquid two phase flow dynamics theory and the continuous improvement of two phase flowrate measurement requirements, the importance of slug flow research has become increasingly prominent. The wire mesh sensor (WMS), which consists of the perpendicular "cross-point" between the transmitting wires and receiving wires, forms a particular "hard field" measurement mode. This paper aims toinvestigate the measurement characteristics and accuracy of a 16×16-electrode conductivity WMS with a spatial resolution of 3.125 mm for gas-liquid two phase slug flow by means of...
FLOMEKO 2022
· TC9
· 2022
· 10.21014/tc9-2022.047
· Download
Weijie Chen, Haohao Xu, Chengxu Tu, Xianfeng Li, Wenkun Gao, Jianli Zhang, Xiang Li, Fubing Bao
Currently, electromagnetic flowmeters must typically be inserted into a straight pipe, which usually requires a larger installation space. To improve installation adaptability, a novel 90° bent electromagnetic flowmeter is proposed. As the measurement signal of the electromagnetic flowmeter is closely related to the flow state of its internal fluid, a large-eddy simulation (LES) was used to study the influence of the shape of the electrode and the contraction section of the flowmeter on the flow characteristics inside the flowmeter to reveal the relationship between them along with the...
FLOMEKO 2022
· TC9
· 2022
· 10.21014/tc9-2022.046
· Download
S. Knotek, J. Geršl
This contribution describes a research of measurement uncertainty of industrial emissions flowing through vertical stacks and its dependence on different geometrical configurations and physical conditions. Since the legislative requirements for emission limits from industrial processes are decreasing, the higher measurement accuracy is becoming more important and new uncertainty standards needs to be implemented. Thiscontribution is a part of the research project 18NRM04 Heroes under European Metrology Program for Innovation and Research (EMPIR). CFD modelling is used to analyse particle...
FLOMEKO 2022
· TC9
· 2022
· 10.21014/tc9-2022.045
· Download
Zhao Zhiyue, Wang Longlong, Li Xiaoting, Wang Jing, Guo Liqiang
Gas-liquid two-phase flow is an unavoidable energy flow phenomenon in industries, and void fraction measurement is a crucial challenge in the two-phase flow. In the study, the coaxial line phase sensor is designed base on electromagnetic wave transmission principle, by which void fraction of the slug and stratified flow was acquired. The void fraction measured by new coaxial has a well time-domain and Probability Density Functions (PDF) distribution characteristics, four typical models with different physical backgrounds were selected to evaluate the measured values of the sensors. The mean...
FLOMEKO 2022
· TC9
· 2022
· 10.21014/tc9-2022.044
· Download
Ning Zhao, Tian Zhang, Xianle Zang, Long Xu, Jing Wang
The measurement of liquid film parameters is of great significance in the momentum transfer and heat transfer characteristics of gas-liquid two phase in annular flow. The liquid film at the bottom of the horizontal annular flow is the thickest and produces the greatest influence on the nature of the annular flow. In large diameter horizontal pipes, the effect of pressure on liquid film behavior lacks systematic discussion. Therefore, a dynamic measurement system for annular flow liquid film was designed based on near-infrared(NIR) sensing technology to complete the measurement of annular...
FLOMEKO 2022
· TC9
· 2022
· 10.21014/tc9-2022.043
· Download
Yumin ZHAO, Xu WANG, Liang PENG, Tianyu WANG
Standard water flow facility (hereinafter referred to as the standard facility) is used for the calibration of cold and hot water flow meters. According to JJF1001-2011 “General Metrology Terms and Definitions” the standard facility needs to be verified that the quantity value stays in the original status in order to ensure the quantity value can meet the requirements during operation. And the verification will help to identify the inaccuracy, to shorten the traceability time after that, and to minimize the test costs and quality risk as far as possible.This project studies a technical...
FLOMEKO 2022
· TC9
· 2022
· 10.21014/tc9-2022.042
· Download
WANG Kexu, CHEN Xiyu
Ultrasonic flowmeter is a velocity flowmeter, and its measurement accuracy is greatly affected by the flowfield in the pipeline. In the actual use process, due to the installation conditions are not ideal, the formation ofvortex flow, pulsating flow, asymmetric flow and other non-ideal flow field in the pipe, which in turn affects the accuracy of ultrasonic flowmeter. This study is based on CFD numerical simulation technology, 90° elbow, reducer, upstream and downstream flange diameter difference of one level and other typical disturbanceelements on the impact of the flow field in the pipe,...
FLOMEKO 2022
· TC9
· 2022
· 10.21014/tc9-2022.041
· Download
PEI Quanbin, Xu Ming, QING Qing, YAN Haiming, WANG Kexu
As an important measuring instrument and basis for the handover of natural gas measurement trade, it is necessary to formulate requirements and test standards for evaluating its structure, performance, safety and consistency. The computer evaluation and detection software of natural gas flow is developed, which realizes the functions of data acquisition and evaluation, flow calculation and verification, physical parameter evaluation and environmental impact factor evaluation. The design, software and hardware configuration of natural gas flow computer evaluation and detection system are...
FLOMEKO 2022
· TC9
· 2022
· 10.21014/tc9-2022.040
· Download
HOU Yang, CHEN Zhengwen
With the ultrasonic flowmeter (Ultrasonic Flowmeter) in the natural gas metering is widely used, ultrasonic flowmeter accuracy is increasingly concerned. however, by the limitations of the calibration operation conditions, there aredifferences between the calibration operation conditions and actual operation conditions , and operation conditions on theimpact of ultrasonic flowmeter metering lack of systematic research, Wuhan branch station established a mobile natural gas metering standard device can be carried out in different pressure conditions of the gas transmission station calibration...
FLOMEKO 2022
· TC9
· 2022
· 10.21014/tc9-2022.039
· Download
Haiming Yan, Yongtao Pei
The mathematical model and the measurement uncertainty of the outflow coefficient for calibrating the sonicnozzle with the High Pressure Piston Prover (HPPP) primary standard device were studied. The design and modification of the existing HPPP primary flow standard device were carried out. , replace the upstream transmission turbine flowmeter with an ultrasonic flowmeter, and replace the downstream transmission turbineflowmeter with a set of inspected sonic nozzle pipe sections, optimize the uncertainty of the measurement results, and realize the function of calibrating the sonic nozzle...
FLOMEKO 2022
· TC9
· 2022
· 10.21014/tc9-2022.038
· Download