Numerical Simulation Analysis of Different Flow Directions in natural gas pipeline

2020 ◽  
Author(s):  
Hong-Wei Yan ◽  
Lu Wang ◽  
Peng-Cheng Li ◽  
Yi Liu ◽  
Jian Li ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Natural Gas ◽  
Simulation Analysis ◽  
Gas Pipeline ◽  
Natural Gas Pipeline ◽  
Flow Directions

scholarly journals Experimental and Numerical Simulation Study on the Shock and Vibration Effect of OD1422-X80 Mainline Natural Gas Pipeline Explosion

2019 ◽  
Vol 2019 ◽  
pp. 1-13 ◽  
Author(s):  
Huayuan Ma ◽  
Mingshou Zhong ◽  
Xinghua Li ◽  
Quanmin Xie ◽  
You Zhou ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Natural Gas ◽  
Ground Vibration ◽  
Gas Pipeline ◽  
Experimental Results ◽  
Maximum Speed ◽  
Impact Compression ◽  
Time Frequency ◽  
Vibration Effect ◽  
Natural Gas Pipeline

In this paper, the explosion experiment of the OD1422-X80 natural gas pipeline was carried out. The phenomenon of pipeline explosion was recorded, and a large amount of data on vibration effects were obtained. The data showed that the ground vibration during the explosion was mainly caused by the physical explosion process, and the subsequent gas explosion did not produce strong vibration. Based on the ANSYS/LS-DYNA platform, a numerical calculation model of this experiment was established. The numerical results agreed well with the experimental results. Simulation and experimental results showed that when the gas pressure in the pipe was lower than 7 MPa, the pipeline cracks stop growing. The maximum speed of the pipe wall moving outward reached 50 m/s, which formed a huge impact compression effect on the surrounding soil. This state spread to distant places and gradually decayed into an elastic stress wave, which formed a ground vibration effect. Time-frequency analysis was introduced into the vibration signal processing. The analysis results showed that the main frequency of pipeline explosion vibration was distributed around 10 Hz and had a long duration. The research results provided a reference for subsequent gas pipeline explosion test and numerical simulation research.

Numerical Simulation on Flow Field inside the Drainage Valve of the Natural Gas Pipeline

2013 ◽  
Vol 853 ◽  
pp. 377-383
Author(s):  
Zhian Deng ◽  
Hao Yun Deng ◽  
Mei Xie
Keyword(s):  
Numerical Simulation ◽  
Natural Gas ◽  
Flow Field ◽  
Velocity Vector ◽  
Gas Pipeline ◽  
Natural Gas Pipeline ◽  
The Standard Model ◽  
Vector Distribution ◽  
Flow Field Characteristics ◽  
Valve Opening

In order to ensure safety and reliable operation of the natural gas pipeline drainage valve,the 3D numerical simulation on flow field characteristics inside the drainage valve of the natural gas pipeline under the different conditions of the seasons of winter and summer is carried out by using the standard model. In the tow different season condition, the streamline and velocity vector distribution inside the drainage valve has been studied. Under the two seasons conditions are studied. The results show that as the change of drainage valve opening the turbulence appear in the valve and the maximum value appears in the inlet,which the winter is larger than summer.The velocity vector distribution in the drainage valve is not the same and the larger velocity appears at the drain exit with the valve opening increasing. The differences in temperature, condensate discharge, condensate gas pipeline in different displacement,density and viscosity in the winter seasons and summer seasons results in the different characteristic.of the flow field characteristics inside discharging valve.

scholarly journals Numerical simulation on filling process of drag reduction agent in natural gas pipeline

2021 ◽  
Vol 1985 (1) ◽  
pp. 012059
Author(s):  
Xiaoyun Yin ◽  
Jiaqiang Jing ◽  
Peiyu Jing ◽  
Jie Sun ◽  
Ying Yuan
Keyword(s):  
Numerical Simulation ◽  
Natural Gas ◽  
Drag Reduction ◽  
Gas Pipeline ◽  
Filling Process ◽  
Natural Gas Pipeline

Numerical Simulation of Natural Gas Pipeline Leakage

ICPTT 2011 ◽  
2011 ◽  
Author(s):  
Shanbi Peng ◽  
Changjun Li ◽  
Enbin Liu ◽  
Kexi Liao ◽  
Wuyi Wang ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Natural Gas ◽  
Gas Pipeline ◽  
Natural Gas Pipeline

Method of Displacement Parameters Prediction Based on Neural Network for Natural Gas Pipeline

2011 ◽  
Vol 79 ◽  
pp. 232-236 ◽  
Author(s):  
Shu Lin Liu ◽  
Xian Ming Wang ◽  
Rui Zhang ◽  
You Fu Tang ◽  
Rui Cong
Keyword(s):  
Neural Network ◽  
Numerical Simulation ◽  
Natural Gas ◽  
Working Conditions ◽  
Gas Pipeline ◽  
Isolation Method ◽  
Natural Gas Pipeline ◽  
Nitrogen Injection ◽  
Nature Gas ◽  
The Relationship

Theoretical investigation is not enough for natural gas pipeline displacement technology of nitrogen isolation method without isolator, which makes displacement parameters hard to be controlled accurately. Therefore, the method of natural gas pipeline displacement parameters prediction based on neural network is proposed in this paper. From Fluent numerical simulation, some useful information is acquired, such as displacement parameters under the typical working conditions, the relationship between different working conditions and nitrogen injection capacity. Moreover, the samples gained by simulation are trained by neutral network which has association function. Thus the aim of forecasting process parameter for nitrogen displacement technology without isolator is attained, which provides an important reference for the production of nitrogen displacement of nature gas pipeline without isolator.

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