Numerical Simulation and Analysis of Diffusion Process for the Leakages of a Tunnel LNG Pipeline
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 s...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2020-01-01
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| Series: | Geofluids |
| Online Access: | http://dx.doi.org/10.1155/2020/8894047 |
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| _version_ | 1832566340073816064 |
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| author | Chunyan Kong Derong Zhang Rong Cai Shuangshuang Li Rongjun Zhu |
| author_facet | Chunyan Kong Derong Zhang Rong Cai Shuangshuang Li Rongjun Zhu |
| author_sort | Chunyan Kong |
| collection | DOAJ |
| description | 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. |
| format | Article |
| id | doaj-art-6489bf814a844737b561f667e8354d48 |
| institution | Kabale University |
| issn | 1468-8115 1468-8123 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geofluids |
| spelling | doaj-art-6489bf814a844737b561f667e8354d482025-02-03T01:04:24ZengWileyGeofluids1468-81151468-81232020-01-01202010.1155/2020/88940478894047Numerical Simulation and Analysis of Diffusion Process for the Leakages of a Tunnel LNG PipelineChunyan Kong0Derong Zhang1Rong Cai2Shuangshuang Li3Rongjun Zhu4School of Mechanical Engineering, Xihua University, Chengdu 610039, ChinaCollege of Mechatronic Engineering, Southwest Petroleum University, Chengdu 610500, ChinaCNOOC Shenzhen Gas Co., Ltd., Shenzhen 510800, ChinaSchool of Mechanical Engineering, Xihua University, Chengdu 610039, ChinaSchool of Mechanical Engineering, Xihua University, Chengdu 610039, ChinaTaking 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.http://dx.doi.org/10.1155/2020/8894047 |
| spellingShingle | Chunyan Kong Derong Zhang Rong Cai Shuangshuang Li Rongjun Zhu Numerical Simulation and Analysis of Diffusion Process for the Leakages of a Tunnel LNG Pipeline Geofluids |
| title | Numerical Simulation and Analysis of Diffusion Process for the Leakages of a Tunnel LNG Pipeline |
| title_full | Numerical Simulation and Analysis of Diffusion Process for the Leakages of a Tunnel LNG Pipeline |
| title_fullStr | Numerical Simulation and Analysis of Diffusion Process for the Leakages of a Tunnel LNG Pipeline |
| title_full_unstemmed | Numerical Simulation and Analysis of Diffusion Process for the Leakages of a Tunnel LNG Pipeline |
| title_short | Numerical Simulation and Analysis of Diffusion Process for the Leakages of a Tunnel LNG Pipeline |
| title_sort | numerical simulation and analysis of diffusion process for the leakages of a tunnel lng pipeline |
| url | http://dx.doi.org/10.1155/2020/8894047 |
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