scholarly journals Friction pressure drop model of gas-liquid two-phase flow in an inclined pipe with high gas and liquid velocities

AIP Advances ◽  
2019 ◽  
Vol 9 (8) ◽  
pp. 085025
Author(s):  
Zilong Liu ◽  
Ruiquan Liao ◽  
Wei Luo ◽  
Joseph X. F. Ribeiro ◽  
Yubin Su
Keyword(s):  
Pressure Drop ◽  
Two Phase Flow ◽  
Phase Flow ◽  
Two Phase ◽  
Friction Pressure ◽  
Friction Pressure Drop ◽  
Inclined Pipe

Hydrodynamics of Two-Phase Flow Across Horizontal In-line and Staggered Rod Bundles

1992 ◽  
Vol 114 (3) ◽  
pp. 450-456 ◽  
Author(s):  
R. Dowlati ◽  
A. M. C. Chan ◽  
M. Kawaji
Keyword(s):  
Pressure Drop ◽  
Void Fraction ◽  
Flow Model ◽  
Two Phase Flow ◽  
Phase Flow ◽  
Gas Velocity ◽  
Rod Bundles ◽  
Two Phase ◽  
Friction Pressure Drop ◽  
Velocity Effect

The void fraction and friction pressure drop measurements have been made for vertical two-phase flow of air-water across staggered and in-line rod bundles with different pitch-to-diameter ratios. All void fraction data showed a strong mass velocity effect and were significantly less than the values predicted by a homogeneous flow model, but were well correlated using the dimensionless gas velocity, jg*. The two-phase friction multiplier data could be well correlated with the Martinelli parameter for G > 200 kg/m2s. The correlations developed for void fraction and two-phase friction multiplier were successfully tested in predicting the total pressure drop in boiling R-113 experiments.

Study on the Influence of the Heaving Condition on the Pressure Drop Characteristics of the Two-Phase Flow in the Circular Tube

2018 ◽  
Author(s):  
Tianzhou Xie ◽  
Jianjun Xu ◽  
Bingde Chen ◽  
Wei Bao
Keyword(s):  
Pressure Drop ◽  
Total Pressure ◽  
Two Phase Flow ◽  
Static Condition ◽  
Calculation Model ◽  
Phase Flow ◽  
Transient Pressure ◽  
Two Phase ◽  
Total Pressure Drop ◽  
Friction Pressure Drop

The experimental study on the pressure drop characteristics of the gas-liquid two-phase flow under heaving condition is carried out. The influence of the heaving condition on the transient and time-averaged two-phase pressure drop is obtained. On this basis, the calculation model of two-phase transient pressure drop under heaving condition is constructed, which is in good agreement with the experimental results. According to the experimental data and the results of the model calculation, the influence of heaving condition on the pressure drop components is analyzed. It is found that the transient total pressure drop is fluctuating periodically, while the time-averaged value is nearly the same as that under static condition. Further analysis shows that the friction pressure drop and the gravity pressure drop are basically the same under heaving condition. The fluctuation of additional pressure drop introduced by heaving motion is the reason for the periodic fluctuation of the total pressure drop.

Pressure Drop for Oil-Gas Two-Phase Flow Through Straight Horizontal Pipe

2007 ◽  
Author(s):  
Wenhong Liu ◽  
Liejin Guo ◽  
Ximin Zhang ◽  
Kai Lin ◽  
Long Yang ◽  
...  
Keyword(s):  
Pressure Drop ◽  
Two Phase Flow ◽  
Phase Flow ◽  
Two Phase ◽  
Horizontal Pipe ◽  
Flow Through ◽  
Oil Gas

scholarly journals Experimental Investigation and Prediction on Pressure Drop during Flow Boiling in Horizontal Microchannels

Micromachines ◽  
2021 ◽  
Vol 12 (5) ◽  
pp. 510
Author(s):  
Yan Huang ◽  
Bifen Shu ◽  
Shengnan Zhou ◽  
Qi Shi
Keyword(s):  
Pressure Drop ◽  
Flow Model ◽  
Two Phase Flow ◽  
Flow Boiling ◽  
Separated Flow ◽  
Heat Fluxes ◽  
Phase Flow ◽  
Vapor Quality ◽  
Two Phase ◽  
Gas Flux

In this paper, two-phase pressure drop data were obtained for boiling in horizontal rectangular microchannels with a hydraulic diameter of 0.55 mm for R-134a over mass velocities from 790 to 1122, heat fluxes from 0 to 31.08 kW/m2 and vapor qualities from 0 to 0.25. The experimental results show that the Chisholm parameter in the separated flow model relies heavily on the vapor quality, especially in the low vapor quality region (from 0 to 0.1), where the two-phase flow pattern is mainly bubbly and slug flow. Then, the measured pressure drop data are compared with those from six separated flow models. Based on the comparison result, the superficial gas flux is introduced in this paper to consider the comprehensive influence of mass velocity and vapor quality on two-phase flow pressure drop, and a new equation for the Chisholm parameter in the separated flow model is proposed as a function of the superficial gas flux . The mean absolute error (MAE ) of the new flow correlation is 16.82%, which is significantly lower than the other correlations. Moreover, the applicability of the new expression has been verified by the experimental data in other literatures.

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