Evaluation of hazard range for the natural gas jet released from a high-pressure pipeline: A computational parametric study

Dong, Gang; Li, Xue; Yang, Yun; Yang, Juntao

doi:10.1016/j.jlp.2010.04.007

Cited by 24 publications

(4 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…At the same time, due to the violent tensile fracture process, the wall of the crack appeared wavy. In the plastic strain nephogram of the calculated results, it could be seen that obvious stress concentration occurred at the fracture position of the pipe wall [18,19]. Figure 14 shows the calculation result of the cracking process of the pipe wall.…”

Section: Pipe Wall Crack Statementioning

confidence: 95%

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

Zhong

et al. 2019

Shock and Vibration

View full text Add to dashboard Cite

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.

show abstract

Section: Pipe Wall Crack Statementioning

confidence: 95%

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

Zhong

et al. 2019

Shock and Vibration

View full text Add to dashboard Cite

show abstract

“…When CH 4 concentration in the tunnel is higher than CH 4 explosion limit (volume fraction 5.3%-15.1% or mass fraction 2.82%~8.87%) [19], there is no explosion risk. However, 5 Geofluids with the continuous diffusion of CH 4 and when the mass fraction of CH 4 reaches 2.82%~8.87%, the CH 4 explosion gas cloud will be formed in the tunnel and will easily trigger an explosion by fire, which will be very dangerous.…”

Section: Distribution Of Ch 4 Explosion Gas Cloud In the Tunnelmentioning

confidence: 99%

Numerical Simulation and Analysis of Diffusion Process for the Leakages of a Tunnel LNG Pipeline

et al. 2020

View full text Add to dashboard Cite

Taking a practical project as an example, based on the computational fluid dynamics (CFD), standard k-ε model and finite element method, a mathematical model for the diffusion due to liquefied natural gas (LNG) pipeline leakage in a tunnel was established, and the diffusion process was numerically simulated for three LNG leakage cases. From the simulation results, the variation of CH4 concentration field and explosive gas cloud with time within the tunnel, and the influence of leakage location on the diffusion was analyzed for the three cases. It was shown that the variation of CH4 concentration field had a similar trend for the three cases, but the CH4 explosive gas cloud length increased rapidly with the LNG leakage intensity so that dangerous situations would occur for the medium and large leakages, and a leak location closer to air inlet would lead to a more dangerous situation. When the amount of LNG leakage in the tunnel is large, the effect of mechanical ventilation is obviously weakened. Furthermore, a nitrogen seal precaution was proposed for the situations.

show abstract

“…EMD algorithm was very fast, but the filtering effect was not stable. So it was easy to remove the useful information together [23][24][25]. On the other hand, the boundary effect also introduced interference signals.…”

Section: Shock and Vibrationmentioning

confidence: 99%

Study on Vibration Characteristics of Natural Gas Pipeline Explosion Based on Improved MP‐WVD Algorithm

Long

et al. 2018

Shock and Vibration

View full text Add to dashboard Cite

In order to meet the requirement of precise analysis of nature gas pipeline explosion, authors combined MP algorithm and WVD distribution to improve the time-frequency resolution and to solve the problem of cross-terms interference. The HHT algorithm was applied to the data preprocessing of MP algorithm to reduce the computational complexity of the MP algorithm. It improved the computing efficiency and laid the foundation for big data analysis. In this paper, authors carried out a full-size pipeline explosion experiment at the CNPC pipeline fracture control State Key Laboratory. Advantages of the improved MP-WVD algorithm were taken to obtain the time-frequency distribution characteristics of the pipeline explosion vibration. The research provided a new algorithm for the time-frequency distribution of nonstationary random vibration, and the result provided a reference for the safe operation and construction of natural gas pipeline.

show abstract

Evaluation of hazard range for the natural gas jet released from a high-pressure pipeline: A computational parametric study

Cited by 24 publications

References 17 publications

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

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

Numerical Simulation and Analysis of Diffusion Process for the Leakages of a Tunnel LNG Pipeline

Study on Vibration Characteristics of Natural Gas Pipeline Explosion Based on Improved MP‐WVD Algorithm

Contact Info

Product

Resources

About