Single and two-phase flow measurements using optical fiber Bragg gratings

2014 ◽  
Author(s):  
Virgínia Helena V. Baroncini ◽  
Cicero Martelli ◽  
Marco José da Silva ◽  
Rigoberto E.M. Morales
Keyword(s):  
Optical Fiber ◽  
Two Phase Flow ◽  
Fiber Bragg Gratings ◽  
Bragg Gratings ◽  
Phase Flow ◽  
Two Phase ◽  
Flow Measurements

scholarly journals Single- and Two-Phase Flow Characterization Using Optical Fiber Bragg Gratings

Sensors ◽  
2015 ◽  
Vol 15 (3) ◽  
pp. 6549-6559 ◽  
Author(s):  
Virgínia Baroncini ◽  
Cicero Martelli ◽  
Marco da Silva ◽  
Rigoberto Morales
Keyword(s):  
Optical Fiber ◽  
Two Phase Flow ◽  
Fiber Bragg Gratings ◽  
Bragg Gratings ◽  
Phase Flow ◽  
Two Phase ◽  
Flow Characterization

scholarly journals Influence of Bubble Deformation on the Signal Characteristics Generated Using an Optical Fiber Gas–Liquid Two-Phase Flow Sensor

Sensors ◽  
2021 ◽  
Vol 21 (21) ◽  
pp. 7338
Author(s):  
Yu Ma ◽  
Yangrui Zhang ◽  
Song Li ◽  
Weimin Sun ◽  
Elfed Lewis
Keyword(s):  
Optical Fiber ◽  
Chemical Engineering ◽  
Two Phase Flow ◽  
Three Dimensional ◽  
Phase Flow ◽  
Two Phase ◽  
Flow Measurements ◽  
Fiber Probe ◽  
Bubble Deformation ◽  
Wide Range

The use of optical fiber probe in two-phase flow measurements is very frequently encountered, especially in the applications of chemical engineering and petroleum industries. In this work, the influence of bubble piercing signals caused by bubble deformation is studied experimentally using a laboratory-prepared wedge-shaped fiber probe in a lab-scale gas–liquid flow generator. A three-dimensional simulation model is established to study the influence of bubble deformation on the piercing signals. A theoretical analysis of the characteristics of the pre-signal influenced by the bubble deformations is undertaken for a wide range of different modeled bubble shapes. Combining the experimental and simulation results, a promising analytical method to estimate the bubble shapes by analyzing the characteristics of pre-signals is proposed. The results of this investigation demonstrate that it is possible to estimate the bubble shapes before the fiber probe contacts the bubble surface. The method developed in this investigation is therefore highly promising for reducing errors caused by deformation during the probe piercing process.

Bias errors induced by cross-talk in two-phase flow measurements

2010 ◽  
Vol 48 (2) ◽  
pp. 250-254 ◽  
Author(s):  
Danxun Li ◽  
Xingkui Wang ◽  
Qiang Zhong
Keyword(s):  
Cross Talk ◽  
Two Phase Flow ◽  
Phase Flow ◽  
Two Phase ◽  
Flow Measurements

Axial Development of Vertical Upward Bubbly Flow in a Minipipe

2005 ◽  
Author(s):  
Tatsuya Hazuku ◽  
Naohisa Tamura ◽  
Norihiro Fukamachi ◽  
Tomoji Takamasa ◽  
Takashi Hibiki ◽  
...  
Keyword(s):  
Void Fraction ◽  
Two Phase Flow ◽  
Constitutive Relations ◽  
Interfacial Area ◽  
Phase Flow ◽  
Two Phase ◽  
Flow Measurements ◽  
Local Flow ◽  
Interfacial Area Concentration ◽  
Drift Flux Model

Accurate prediction of the interfacial area concentration is essential to successful development of the interfacial transfer terms in the two-fluid model. Mechanistic modeling of the interfacial area concentration entirely relies on accurate local flow measurements over extensive flow conditions and channel geometries. From this point of view, accurate measurements of flow parameters such as void fraction, interfacial area concentration, gas velocity, bubble Sauter mean diameter, and bubble number density were performed by the image processing method at five axial locations in vertical upward bubbly flows using a 1.02 mm-diameter pipe. The frictional pressure loss was also measured by a differential pressure cell. In the experiment, the superficial liquid velocity and the void fraction ranged from 1.02 m/s to 4.89 m/s and from 0.980% to 24.6%, respectively. The obtained data give near complete information on the time-averaged local hydrodynamic parameters of two-phase flow. These data can be used for the development of reliable constitutive relations which reflect the true transfer mechanisms in two-phase flow. As the first step to understand the flow characteristics in mini-channels, the applicability of the existing drift-flux model, interfacial area correlation, and frictional pressure correlation was examined by the data obtained in the mini-channel.

Sign in / Sign up

Export Citation Format

Share Document