"CFD Simulation for Ball Valve Erosion of Natural Gas Pipelines Under Gas-Sand Two-Phase Flow

2021 ◽  
Author(s):  
Donghua Peng ◽  
Dong Shaohua ◽  
Laibin Zhang
Keyword(s):  
Natural Gas ◽  
Cfd Simulation ◽  
Two Phase Flow ◽  
Ball Valve ◽  
Phase Flow ◽  
Gas Pipelines ◽  
Two Phase ◽  
Natural Gas Pipelines

scholarly journals Transient modeling of non-isothermal, dispersed two-phase flow in natural gas pipelines

2010 ◽  
Vol 34 (2) ◽  
pp. 495-507 ◽  
Author(s):  
Mohammad Abbaspour ◽  
Kirby S. Chapman ◽  
Larry A. Glasgow
Keyword(s):  
Natural Gas ◽  
Two Phase Flow ◽  
Phase Flow ◽  
Gas Pipelines ◽  
Two Phase ◽  
Natural Gas Pipelines ◽  
Transient Modeling

scholarly journals Characterization of the Solid Particle Erosion of the Sealing Surface Materials of a Ball Valve

Metals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 263
Author(s):  
Donghua Peng ◽  
Shaohua Dong ◽  
Zhiqiang Wang ◽  
Dongying Wang ◽  
Yinuo Chen ◽  
...  
Keyword(s):  
Erosion Rate ◽  
Cfd Simulation ◽  
Two Phase Flow ◽  
Simulation Analysis ◽  
Impact Angle ◽  
Ball Valve ◽  
Phase Flow ◽  
Two Phase ◽  
Valve Sealing ◽  
The Impact

The ball valve is an essential piece of equipment in an oil and gas pipeline. The sand particles transported through the pipeline can cause erosion and wear to the ball valve, thus causing it to fail, leading to serious safety hazards. In this paper, the self-designed erosion experiment method was combined with computational fluid dynamics (CFD), while the Euler-Lagrange method was also introduced to optimize the Oka erosion model and Ford particle-wall rebound model. The erosion mechanism and characteristics of the ball valve sealing surface in gas-solid two-phase flow were simulated, while the erosion condition of the specimen was analyzed and compared when exposed to different factors, such as different particle velocities, impact angle, particle size, and specimen materials. The experimental data conformed well to the CFD erosion simulation data, verifying the accuracy of the CFD simulation analysis. The results indicated that the worn surface was caused by various wear mechanisms, while a “stagnation zone” was identified at the center of the specimen. The maximum erosion area, which was U-shaped, was also located at the center. The erosion rate increased in conjunction with an increase in the particle velocity and size, both of which failed to affect the erosion pattern. The erosion rate initially increased, after which it decreased with the impact angle, reaching the maximum value at an impact angle of 30°. This paper summarizes the erosion failure mechanism and characteristics in gas–solid two-phase flow and provides both technical support and a theoretical basis for the on-site maintenance of essential vulnerable parts in the pipeline, such as ball valves.

Analysis of Transient Gas-Liquid Two-Phase Flow in Pipelines

1988 ◽  
Vol 110 (2) ◽  
pp. 93-101 ◽  
Author(s):  
K. Kohda ◽  
Y. Suzukawa ◽  
H. Furukawa
Keyword(s):  
Natural Gas ◽  
Flow Rate ◽  
Two Phase Flow ◽  
Air Flow ◽  
Water Flow Rate ◽  
Mass Conservation ◽  
Phase Flow ◽  
Two Phase ◽  
Experimental Conditions ◽  
Natural Gas Pipelines

A new method is developed to analyze transient gas-liquid two-phase flow in natural gas pipelines. This method utilizes the two velocity mixture model to derive the basic equations. Also, a new model, which expresses phase conditions for multicomponent natural gas-condensate system, is presented to derive mass conservation equations for each hypothetical component. Transient air-water two-phase flow experiments were conducted using a test pipeline 105.3 mm in diameter and 1436.5 m long. Experimental conditions include, increasing or decreasing air flow rate with constant water flow rate, and transition from single-phase air flow to air-water two-phase flow. Experimental data were compared with calculated results, and the agreement was very good. Furthermore, calculated results agreed very well with a published field data.

CFD SIMULATION OF TWO PHASE ANNULAR FLOW IN NATURAL GAS PIPELINES

2019 ◽  
Author(s):  
Ekhwaiter Abobaker ◽  
John Shirokoff ◽  
Mohammad Azizur Rahman
Keyword(s):  
Natural Gas ◽  
Annular Flow ◽  
Cfd Simulation ◽  
Gas Pipelines ◽  
Two Phase ◽  
Natural Gas Pipelines

scholarly journals Numerical and experimental studies of gas–liquid flow and pressure drop in multiphase pump valves

2020 ◽  
Vol 103 (3) ◽  
pp. 003685042094088
Author(s):  
Yi Ma ◽  
Minjia Zhang ◽  
Huashuai Luo
Keyword(s):  
Pressure Drop ◽  
Two Phase Flow ◽  
Volume Fraction ◽  
Test System ◽  
Ball Valve ◽  
Phase Flow ◽  
Two Phase ◽  
Pressure Drops ◽  
Disk Valve ◽  
Predicted Values

A numerical and experimental study was carried out to investigate the two-phase flow fields of the typical three valves used in the multiphase pumps. Under the gas volume fraction conditions in the range of 0%–100%, the three-dimensional steady and dynamic two-phase flow characteristics, pressure drops, and their multipliers of the ball valve, cone valve, and disk valve were studied, respectively, using Eulerian–Eulerian approach and dynamic grid technique in ANSYS FLUENT. In addition, a valve test system was built to verify the simulated results by the particle image velocimetry and pressure test. The flow coefficient CQ (about 0.989) of the disk valve is greater than those of the other valves (about 0.864) under the steady flow with a high Reynolds number. The two-phase pressure drops of the three valves fluctuate in different forms with the vibration of the cores during the dynamic opening. The two-phase multipliers of the fully opened ball valve are consistent with the predicted values of the Morris model, while those of the cone valve and disk valve had the smallest differences with the predicted values of the Chisholm model. Through the comprehensive analysis of the flow performance, pressure drop, and dynamic stability of the three pump valves, the disk valve is found to be more suitable for the multiphase pumps due to its smaller axial space, resistance loss, and better flow capacity.

Gas-Liquid Two-Phase Flow Detection Techniques Based on Internal and External Tube Differential Pressure Flowmeter

2014 ◽  
Vol 568-570 ◽  
pp. 363-369
Author(s):  
Li Li Pang ◽  
Han Chuan Dong ◽  
Yun Shi ◽  
Li De Fang
Keyword(s):  
Cfd Simulation ◽  
Two Phase Flow ◽  
Theoretical Models ◽  
Differential Pressure ◽  
Phase Flow ◽  
Two Phase ◽  
Modified Model ◽  
Detection Techniques ◽  
External Tube ◽  
Flow Detection

The gas-liquid two-phase flow exists widely in nature and in our daily life, to realize the phase flow does not separate online measurement has become an important subject in the study. Through CFD simulation experiment, the optimal structure of inner and outer tube differential pressure flowmeter prototype. Through the analysis of the experimental data, comparison of the classical theoretical models found high Chishlom prediction model error is minimum. Moisture the modified model, the relative error of measurement is better than in the range of experiment 5%.

An Evaluation of Existing Two-Phase Flow Correlations for Use With ASME Sharp Edge Metering Orifices

1977 ◽  
Vol 99 (3) ◽  
pp. 343-347 ◽  
Author(s):  
L. T. Smith ◽  
J. W. Murdock ◽  
R. S. Applebaum
Keyword(s):  
Natural Gas ◽  
Data Base ◽  
Root Mean Square ◽  
Two Phase Flow ◽  
Salt Water ◽  
Sharp Edge ◽  
Phase Flow ◽  
Mean Square ◽  
Two Phase ◽  
Liquid Flows

The two-phase flow correlations developed by Murdock, James, Marriott, and Smith and Leang are evaluated for the case of flow through sharp edge measuring orifices which physically meet ASME standards for flow measurement. The evaluation is based on two sets of consistent orifice flow data. The first data base consists of 34 test points for the flow of steam-water mixtures. The second data base consists of 81 data points for the flow of air-water, natural gas-water, natural gas-salt water, and natural gas-distillate mixtures. The root mean square fractional deviation of each correlation is used to determine its predictive reliability. Computed root mean square fraction deviations for steam-water flows are: James, ±0.081; Marriott, ±0.114; Murdock, ±0.141; Smith and Leang, ±0.218. For the case of gas-liquid flows, the values are: Murdock, ±0.074; James, ±0.178; Smith and Leang, ±0.183; Marriott, ±0.458.

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