Numerical Investigation of Spontaneous Ignition During Pressurized Hydrogen Release: Effects of Burst Disk Shape and Opening Characteristics
Pressure relief devices are critical for the safe release of pressurized hydrogen. To address the risk of spontaneous ignition during a high-pressure release, three-dimensional (3D) numerical simulations are systematically conducted to investigate the effects of burst conditions on spontaneous ignit...
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MDPI AG
2025-06-01
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| author | Wanbing Lin Zhenhua Wang Guanghu Wang Juncheng Jiang Jingnan Wu Lei Ni Ru Zhou Mingguang Zhang Liang Ma |
| author_facet | Wanbing Lin Zhenhua Wang Guanghu Wang Juncheng Jiang Jingnan Wu Lei Ni Ru Zhou Mingguang Zhang Liang Ma |
| author_sort | Wanbing Lin |
| collection | DOAJ |
| description | Pressure relief devices are critical for the safe release of pressurized hydrogen. To address the risk of spontaneous ignition during a high-pressure release, three-dimensional (3D) numerical simulations are systematically conducted to investigate the effects of burst conditions on spontaneous ignition behavior. Eight simulation cases are considered, involving two opening processes (instantaneous and 10-step-like), three burst disk shapes (flat, conventional domed, and reverse domed), and five opening ratios (1, 0.8, 0.6, 0.4, and 0.2). The 10-step-like opening enhances jet turbulence and promotes flame merging between the boundary layer and jet front, intensifying combustion. Domed structures cause a high-velocity region behind the leading shock wave, altering jet front evolution. Compared with reverse-domed disks, flat and conventional domed disks generate stronger vortices and a larger shock-heated area, resulting in more severe combustion and elevated fire risk. As the opening ratio decreases, both shock wave strength and propagation velocity drop significantly, and spontaneous ignition does not occur. The opening ratio has minimal influence on the distance traveled by shock-induced heating. These findings offer meaningful guidance for the design and manufacture of pressure relief devices for the safe emergency release of hydrogen. |
| format | Article |
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| language | English |
| publishDate | 2025-06-01 |
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| spelling | doaj-art-c50e5a0be6a945e5b2d18d1d5dc9afd02025-07-25T13:22:43ZengMDPI AGFire2571-62552025-06-018724610.3390/fire8070246Numerical Investigation of Spontaneous Ignition During Pressurized Hydrogen Release: Effects of Burst Disk Shape and Opening CharacteristicsWanbing Lin0Zhenhua Wang1Guanghu Wang2Juncheng Jiang3Jingnan Wu4Lei Ni5Ru Zhou6Mingguang Zhang7Liang Ma8College of Safety Science and Engineering, Nanjing Tech University, Nanjing 211816, ChinaCollege of Safety Science and Engineering, Nanjing Tech University, Nanjing 211816, ChinaJiangsu Xuzhou Petroleum Branch, Sinopec Sales Co., Ltd., Xuzhou 221006, ChinaCollege of Safety Science and Engineering, Nanjing Tech University, Nanjing 211816, ChinaCollege of Safety Science and Engineering, Nanjing Tech University, Nanjing 211816, ChinaCollege of Safety Science and Engineering, Nanjing Tech University, Nanjing 211816, ChinaCollege of Safety Science and Engineering, Nanjing Tech University, Nanjing 211816, ChinaCollege of Safety Science and Engineering, Nanjing Tech University, Nanjing 211816, ChinaCollege of Safety Science and Engineering, Nanjing Tech University, Nanjing 211816, ChinaPressure relief devices are critical for the safe release of pressurized hydrogen. To address the risk of spontaneous ignition during a high-pressure release, three-dimensional (3D) numerical simulations are systematically conducted to investigate the effects of burst conditions on spontaneous ignition behavior. Eight simulation cases are considered, involving two opening processes (instantaneous and 10-step-like), three burst disk shapes (flat, conventional domed, and reverse domed), and five opening ratios (1, 0.8, 0.6, 0.4, and 0.2). The 10-step-like opening enhances jet turbulence and promotes flame merging between the boundary layer and jet front, intensifying combustion. Domed structures cause a high-velocity region behind the leading shock wave, altering jet front evolution. Compared with reverse-domed disks, flat and conventional domed disks generate stronger vortices and a larger shock-heated area, resulting in more severe combustion and elevated fire risk. As the opening ratio decreases, both shock wave strength and propagation velocity drop significantly, and spontaneous ignition does not occur. The opening ratio has minimal influence on the distance traveled by shock-induced heating. These findings offer meaningful guidance for the design and manufacture of pressure relief devices for the safe emergency release of hydrogen.https://www.mdpi.com/2571-6255/8/7/246high-pressure releasehydrogenspontaneous ignitionburst conditionsCFD |
| spellingShingle | Wanbing Lin Zhenhua Wang Guanghu Wang Juncheng Jiang Jingnan Wu Lei Ni Ru Zhou Mingguang Zhang Liang Ma Numerical Investigation of Spontaneous Ignition During Pressurized Hydrogen Release: Effects of Burst Disk Shape and Opening Characteristics Fire high-pressure release hydrogen spontaneous ignition burst conditions CFD |
| title | Numerical Investigation of Spontaneous Ignition During Pressurized Hydrogen Release: Effects of Burst Disk Shape and Opening Characteristics |
| title_full | Numerical Investigation of Spontaneous Ignition During Pressurized Hydrogen Release: Effects of Burst Disk Shape and Opening Characteristics |
| title_fullStr | Numerical Investigation of Spontaneous Ignition During Pressurized Hydrogen Release: Effects of Burst Disk Shape and Opening Characteristics |
| title_full_unstemmed | Numerical Investigation of Spontaneous Ignition During Pressurized Hydrogen Release: Effects of Burst Disk Shape and Opening Characteristics |
| title_short | Numerical Investigation of Spontaneous Ignition During Pressurized Hydrogen Release: Effects of Burst Disk Shape and Opening Characteristics |
| title_sort | numerical investigation of spontaneous ignition during pressurized hydrogen release effects of burst disk shape and opening characteristics |
| topic | high-pressure release hydrogen spontaneous ignition burst conditions CFD |
| url | https://www.mdpi.com/2571-6255/8/7/246 |
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