Application of C4D Technique to Void Fraction Measurement of Gas-Liquid Two-Phase Flow: Stratified Flow

2011 ◽  
Vol 130-134 ◽  
pp. 3632-3635
Author(s):  
Kum Chol Ri ◽  
Lei Wang ◽  
San Fu Fu ◽  
Zhi Yao Huang ◽  
Bao Liang Wang ◽  
...  
Keyword(s):  
Void Fraction ◽  
Two Phase Flow ◽  
Stratified Flow ◽  
Absolute Error ◽  
Empirical Correlation ◽  
Phase Flow ◽  
Maximum Absolute Error ◽  
Two Phase ◽  
Measurement Results ◽  
Fraction Measurement

The feasibility of applying C4D technique to void fraction measurement of gas-liquid two-phase flow is investigated in this paper. As a preliminary research, void fraction measurement under stratified flow is studied. Conductance of two-phase fluid are obtained by a new C4D sensor, and then used to measure the void fraction in 15mm i.d. pipe. An empirical correlation between void fraction and normalized conductance is developed. Thus, the void fraction can be determined by this empirical correlation with the obtained conductance. The experiment results show that applying C4D technique to the void fraction measurement of gas-liquid two-phase flow is feasible. The measurement results of void fraction are satisfactory, and the maximum absolute error of void fraction is less than 0.03.

Void fraction measurement of the air-water two-phase flow in the sub-channel of a rod bundle geometry based on an impedance meter

2018 ◽  
Vol 115 ◽  
pp. 480-486 ◽  
Author(s):  
Bin Yu ◽  
Wenxiong Zhou ◽  
Liangming Pan ◽  
Hang Liu ◽  
Quanyao Ren ◽  
...  
Keyword(s):  
Void Fraction ◽  
Two Phase Flow ◽  
Phase Flow ◽  
Two Phase ◽  
Rod Bundle ◽  
Fraction Measurement ◽  
Impedance Meter

scholarly journals Overview of Void Fraction Measurement Techniques, Databases and Correlations for Two-Phase Flow in Small Diameter Channels

Fluids ◽  
2020 ◽  
Vol 5 (4) ◽  
pp. 216
Author(s):  
Álvaro Roberto Gardenghi ◽  
Erivelto dos Santos Filho ◽  
Daniel Gregório Chagas ◽  
Guilherme Scagnolatto ◽  
Rodrigo Monteiro Oliveira ◽  
...  
Keyword(s):  
Void Fraction ◽  
Two Phase Flow ◽  
Measurement Techniques ◽  
Small Diameter ◽  
Phase Flow ◽  
Two Phase ◽  
Channel Diameter ◽  
Experimental Database ◽  
Absolute Relative Error ◽  
Fraction Measurement

Void fraction is one of the most important parameters for the modeling and characterization of two-phase flows. This manuscript presents an overview of void fraction measurement techniques, experimental databases and correlations, in the context of microchannel two-phase flow applications. Void fraction measurement techniques were reviewed and the most suitable techniques for microscale measurements were identified along its main characteristics. An updated void fraction experimental database for small channel diameter was obtained including micro and macrochannel two-phase flow data points. These data have channel diameter ranging from 0.5 to 13.84 mm, horizontal and vertical directions, and fluids such as air-water, R410a, R404a, R134a, R290, R12 and R22 for both diabatic and adiabatic conditions. New published void fraction correlations as well high cited ones were evaluated and compared to this small-diameter void fraction database in order to quantify the prediction error of them. Moreover, a new drift flux correlation for microchannels was also developed, showing that further improvement of available correlations is still possible. The new correlation was able to predict the microchannel database with mean absolute relative error of 9.8%, for 6% of relative improvement compared to the second-best ranked correlation for small diameter channels.

Void fraction measurement in modeled two-phase flow inside a vertical pipe by using polyethylene phantoms

2015 ◽  
Vol 40 (44) ◽  
pp. 15206-15212 ◽  
Author(s):  
Reza Faghihi ◽  
Mohammadreza Nematollahi ◽  
Ali Erfaninia ◽  
Mahtab Adineh
Keyword(s):  
Void Fraction ◽  
Two Phase Flow ◽  
Phase Flow ◽  
Vertical Pipe ◽  
Two Phase ◽  
Fraction Measurement

F133 Void fraction measurement in a liquid-metal two-phase flow

2011 ◽  
Vol 2011 (0) ◽  
pp. 147-148
Author(s):  
Yasushi Saito ◽  
Yudai Yamamoto ◽  
Kaichiro MISHIMA
Keyword(s):  
Liquid Metal ◽  
Void Fraction ◽  
Two Phase Flow ◽  
Phase Flow ◽  
Two Phase ◽  
Fraction Measurement

A new contactless impedance sensor for void fraction measurement of gas–liquid two-phase flow

2016 ◽  
Vol 27 (12) ◽  
pp. 124001 ◽  
Author(s):  
Haifeng Ji ◽  
Ya Chang ◽  
Zhiyao Huang ◽  
Baoliang Wang ◽  
Haiqing Li
Keyword(s):  
Void Fraction ◽  
Two Phase Flow ◽  
Phase Flow ◽  
Two Phase ◽  
Impedance Sensor ◽  
Fraction Measurement

Transmission Type Ultrasonic Imaging of Horizontal Two-Phase Flow

2010 ◽  
Author(s):  
Jen-Shih Chang
Keyword(s):  
Void Fraction ◽  
Two Phase Flow ◽  
Ultrasonic Transducer ◽  
Ultrasonic Imaging ◽  
Stratified Flow ◽  
Sound Frequency ◽  
Parameter Determination ◽  
Phase Flow ◽  
Two Phase ◽  
Pulse Echo

Ultrasonic technique was widely applied for the measurement of two-phase flow, however, the majority techniques deal primary with pulse echo technique under higher operating sound frequency in a MHz order since higher accuracy can be obtain for the dynamic gas-liquid interface locations. On the other hand the transmission type ultrasonic methods was also developed for bubbly flow diagnostics for the time and cross sectional averaged void fraction measurement or bubble two-phase flow parameter determination by pulse echo techniques with higher operating sound frequency in a MHz order. In this work, the transmission type ultrasonic imaging of horizontal two-phase flow was experimentally investigated. Ultrasonic transducer used is 150 kHz and time averaged void fraction results for stratified flow was compared with capacitance void measurement and ultrasonic pulsed echo techniques. The results show that the transmission intensity for the stratified flow pattern decreases with increasing void fraction until 55% of void then increases with increasing void fraction till 100%. An application to plug, slug and annular flow regime also investigated in detail.

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