Numerical Simulation Study on Ventilation Optimization Design of Extra-Long Double-Line Mountain Tunnels with Parallel Heading: A Case Study
There are many issues affecting multi-hole parallel tunneling and long tunnel ventilation, such as insufficient fresh air supplied at the tunnel face, pollution by contaminated winds, and uncoordinated work among multiple fans. In view of these issues, this paper uses the numerical simulation softwa...
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MDPI AG
2022-12-01
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| Series: | Applied Sciences |
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| author | Weidong Guo Lei Chen Guoqiang Liu Juntao Wang Shaoshuai Shi Lin Bu |
| author_facet | Weidong Guo Lei Chen Guoqiang Liu Juntao Wang Shaoshuai Shi Lin Bu |
| author_sort | Weidong Guo |
| collection | DOAJ |
| description | There are many issues affecting multi-hole parallel tunneling and long tunnel ventilation, such as insufficient fresh air supplied at the tunnel face, pollution by contaminated winds, and uncoordinated work among multiple fans. In view of these issues, this paper uses the numerical simulation software Fluent combined with the orthogonal analysis test method, and, based on the actual working conditions of Yuelongmen Tunnel on the Chenglan Line, simulates the parameters of the duct, the installation position of the jet fan at the cross channel, and the combined operation status of multiple fans. The main conclusions are as follows: (1) the primary factor affecting the CO discharge from the tunnel face is the distance between the exit of the duct and the tunnel face, and the secondary factor is the diameter of the duct, while the position of the duct is the least influential factor; (2) the jet fan at the intersection of the cross channel should be set close to the pollution source in such a way as to prevent the jet from hitting the windward side of the cross channel and thereby avoid causing the contaminated wind to contaminate the adjacent tunnel; (3) in tunnels in which blasting operations do not occur, the simultaneous use of high-power air supplies and jet fans will reduce the air pressure in the tunnel, generate an air pressure difference with the adjacent tunnel, trap polluted air, and reduce the ventilation effect. |
| first_indexed | 2024-03-09T17:52:04Z |
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| id | doaj.art-2c720bf73a994625aa0e0de6d39aa95e |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-09T17:52:04Z |
| publishDate | 2022-12-01 |
| publisher | MDPI AG |
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| spelling | doaj.art-2c720bf73a994625aa0e0de6d39aa95e2023-11-24T10:36:10ZengMDPI AGApplied Sciences2076-34172022-12-0112231241610.3390/app122312416Numerical Simulation Study on Ventilation Optimization Design of Extra-Long Double-Line Mountain Tunnels with Parallel Heading: A Case StudyWeidong Guo0Lei Chen1Guoqiang Liu2Juntao Wang3Shaoshuai Shi4Lin Bu5School of Qilu Transportation, Shandong University, Jinan 250061, ChinaSchool of Civil Enginerring, Shandong University, Jinan 250061, ChinaChina Railway 19th Bureau Group Sixth Engineering Co., Wuxi 214028, ChinaChina Railway 19th Bureau Group Sixth Engineering Co., Wuxi 214028, ChinaSchool of Qilu Transportation, Shandong University, Jinan 250061, ChinaSchool of Qilu Transportation, Shandong University, Jinan 250061, ChinaThere are many issues affecting multi-hole parallel tunneling and long tunnel ventilation, such as insufficient fresh air supplied at the tunnel face, pollution by contaminated winds, and uncoordinated work among multiple fans. In view of these issues, this paper uses the numerical simulation software Fluent combined with the orthogonal analysis test method, and, based on the actual working conditions of Yuelongmen Tunnel on the Chenglan Line, simulates the parameters of the duct, the installation position of the jet fan at the cross channel, and the combined operation status of multiple fans. The main conclusions are as follows: (1) the primary factor affecting the CO discharge from the tunnel face is the distance between the exit of the duct and the tunnel face, and the secondary factor is the diameter of the duct, while the position of the duct is the least influential factor; (2) the jet fan at the intersection of the cross channel should be set close to the pollution source in such a way as to prevent the jet from hitting the windward side of the cross channel and thereby avoid causing the contaminated wind to contaminate the adjacent tunnel; (3) in tunnels in which blasting operations do not occur, the simultaneous use of high-power air supplies and jet fans will reduce the air pressure in the tunnel, generate an air pressure difference with the adjacent tunnel, trap polluted air, and reduce the ventilation effect.https://www.mdpi.com/2076-3417/12/23/12416extra-long mountain tunnelparallel headingventilation optimization designCFD |
| spellingShingle | Weidong Guo Lei Chen Guoqiang Liu Juntao Wang Shaoshuai Shi Lin Bu Numerical Simulation Study on Ventilation Optimization Design of Extra-Long Double-Line Mountain Tunnels with Parallel Heading: A Case Study Applied Sciences extra-long mountain tunnel parallel heading ventilation optimization design CFD |
| title | Numerical Simulation Study on Ventilation Optimization Design of Extra-Long Double-Line Mountain Tunnels with Parallel Heading: A Case Study |
| title_full | Numerical Simulation Study on Ventilation Optimization Design of Extra-Long Double-Line Mountain Tunnels with Parallel Heading: A Case Study |
| title_fullStr | Numerical Simulation Study on Ventilation Optimization Design of Extra-Long Double-Line Mountain Tunnels with Parallel Heading: A Case Study |
| title_full_unstemmed | Numerical Simulation Study on Ventilation Optimization Design of Extra-Long Double-Line Mountain Tunnels with Parallel Heading: A Case Study |
| title_short | Numerical Simulation Study on Ventilation Optimization Design of Extra-Long Double-Line Mountain Tunnels with Parallel Heading: A Case Study |
| title_sort | numerical simulation study on ventilation optimization design of extra long double line mountain tunnels with parallel heading a case study |
| topic | extra-long mountain tunnel parallel heading ventilation optimization design CFD |
| url | https://www.mdpi.com/2076-3417/12/23/12416 |
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