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学者姓名：郭进
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Abstract ：
在自主设计的长度和内径均为25 cm的圆柱形容器中,开展了不同掺氢比(x)的氢气-甲烷-空气泄爆实验.实验结果表明:X对容器内部超压有显著影响,容器内共出现三类压力峰值(p1、p2、p3).p1是泄放速率超过了燃烧产物生成率导致的,并出现在x＜0.9的实验中,其幅值几乎不受x的影响;P2由声学振荡产生并且出现在0.45≤x≤0.9的实验中;p3是火焰燃烧面积达到最大值产生,仅出现在X=1的情况下.声学振荡造成的超压峰值随着x单调增加,在发生声学振荡时,火焰表面会出现周期性的细小胞格,并且声学振荡的频率与细小胞格出现的频率相近.X＜0.3时,容器内只存在一个压力峰值p1;X＞0.3时,容器内最大超压随着x单调增加.x＞0.15时,外部爆炸的最大超压也随着x的增加而增加.
Keyword ：
声学振荡 声学振荡 外部爆炸 外部爆炸 掺氢比 掺氢比 火焰传播 火焰传播 爆炸超压 爆炸超压
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| GB/T 7714 | 王昊哲 , 郭进 , 吴佳晗 et al. 掺氢比对氢气-甲烷-空气燃爆特性的影响 [J]. | 工程热物理学报 , 2025 , 46 (2) : 669-678 . |
| MLA | 王昊哲 et al. "掺氢比对氢气-甲烷-空气燃爆特性的影响" . | 工程热物理学报 46 . 2 (2025) : 669-678 . |
| APA | 王昊哲 , 郭进 , 吴佳晗 , 张瀚文 , 张苏 . 掺氢比对氢气-甲烷-空气燃爆特性的影响 . | 工程热物理学报 , 2025 , 46 (2) , 669-678 . |
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Explosion venting technology is an effective means of reducing explosive hazards, and hydrogen volume fraction (chi) is one of the important parameters affecting its effectiveness. The vent covers, as a key part of the explosion venting application, consist of two types: inertia-free (e.g., membranes) and inertial (e.g., panels). chi has been extensively studied using inertial-free vent covers, but very limited work has been done using an inertial vent cover. Hence, the effects of chi, ranging from 0 to 1.0, on the vented H-2/CH4/air explosion were studied in a chamber with a hinged aluminum panel, and the explosion overpressure during venting was simulated by FLACS software. The results show that the flame bubble becomes larger and brighter with increasing chi. However, the time for the flame to travel through the vent (t(out)) and the opening angle of the hinged panel at the time of t(out) constantly decreases as chi increases from 0 to 1.0. In the tests with chi <= 0.6, p(3) caused by acoustically enhanced combustion becomes the pressure peak with the highest amplitude in the internal pressure profile, but the pressure peak p(2) induced by the external explosion dominates the internal pressure trace for chi > 0.6. In comparison to the H-2/CH4/air deflagration experiments using an inertialess vent cover, the shape of the external fireball is quite similar for smaller chi in the current study with an inertial vent panel. However, the use of the inertial vent panel results in a more flattened external fireball for larger chi. The highest amplitude of the external pressure peak (p(ext)) and the maximum reduced overpressure (p(red)) increase with increasing chi. Whether the studies are performed with inertial and inertialess vent covers or FLACS simulations, the formation time (Delta t) of p(ext )decreases linearly with increasing chi, but p(red) increases linearly with S-2(l). The explosion overpressure simulated by FLACS is relatively close to the experimental results, and in particular, the simulated p(red) agrees very well with the experimental value.
Keyword ：
Flame propagation Flame propagation H-2/CH4/Air explosion H-2/CH4/Air explosion Hinged vent panel Hinged vent panel Hydrogen volume fraction Hydrogen volume fraction Overpressure Overpressure
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| GB/T 7714 | Huang, Shikai , Guo, Jin , Mei, Liang et al. Experiments on vented H2/CH4/air explosion in a chamber with a hinged panel: Effects of hydrogen volume fraction [J]. | JOURNAL OF LOSS PREVENTION IN THE PROCESS INDUSTRIES , 2025 , 94 . |
| MLA | Huang, Shikai et al. "Experiments on vented H2/CH4/air explosion in a chamber with a hinged panel: Effects of hydrogen volume fraction" . | JOURNAL OF LOSS PREVENTION IN THE PROCESS INDUSTRIES 94 (2025) . |
| APA | Huang, Shikai , Guo, Jin , Mei, Liang , Wang, Fang , Wang, Changjian , Lin, Jin . Experiments on vented H2/CH4/air explosion in a chamber with a hinged panel: Effects of hydrogen volume fraction . | JOURNAL OF LOSS PREVENTION IN THE PROCESS INDUSTRIES , 2025 , 94 . |
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Abstract ：
Explosion venting is the most commonly used technique to reduce the hazard from accidental deflagration of combustible gases. Since less attention is paid to the influence of inertial vent on vented H2/CH4/air deflagration, the effects of area density (Ws) of a hinged inertial cover on the pressure profile and flame behavior during H2/CH4/air deflagration, with hydrogen volume fraction in fuel (χH2) being 0.5 and 0.8, were investigated by covering the vent using aluminum plates with various thicknesses. The results show that the interval between ignition and the moment the flame just travels through the vent (tout) is almost independent of Ws, but the opening angle of the panel at the time of tout is closely related to Ws. For a given χH2, the opening angle at the time of tout decreases with an increase in Ws. For a certain Ws, the opening angle of the panel is smaller for χH2 = 0.8 in comparison with the tests at χH2 = 0.5. In the test with higher Ws, the external fireball becomes more flattened. In tests at χH2 = 0.5, p3 induced by acoustic oscillations dominates the internal overpressure, but p2 resulting from the external explosion becomes the dominant pressure peak at χH2 = 0.8. The maximum reduced overpressure (pred) and maximum external overpressure (pext) are almost independent of Ws at χH2 = 0.5. However, in tests at χH2 = 0.8, pred and pext increase sharply with an increase in Ws from 0 kg/m2 to 2.7 kg/m2, but there is relatively little variation in pred and pext as Ws continues to increase from 2.7 kg/m2 to 24.3 kg/m2. Except for the test with Ws = 0 kg/m2, for a specific Ws, pred and pext at χH2 = 0.8 are always greater than those at χH2 = 0.5. © 2024
Keyword ：
Combustion Combustion Hydrogen Hydrogen Vents Vents
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| GB/T 7714 | Guo, Jin , Huang, Shikai , Wang, Fang et al. Effects of area density of a hinged inertial cover on H2/CH4/air deflagrations in a vented chamber [J]. | Fuel , 2024 , 374 . |
| MLA | Guo, Jin et al. "Effects of area density of a hinged inertial cover on H2/CH4/air deflagrations in a vented chamber" . | Fuel 374 (2024) . |
| APA | Guo, Jin , Huang, Shikai , Wang, Fang , Xu, Caijun , Wu, Zelong , Zhang, Fan et al. Effects of area density of a hinged inertial cover on H2/CH4/air deflagrations in a vented chamber . | Fuel , 2024 , 374 . |
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In this work, the coupling of explosion venting (vent size) and inerting (N2) on H2/air deflagration was investigated. Experiments were carried out in a vertical rectangular duct with an upper opening at an initial temperature and pressure of 280 K and 101 kPa, and a vent coefficient Kv was employed to replace the vent size to elucidate its effect on pressure buildup and flame propagation during H2/N2/air deflagration. In the present study, the internal pressure profile is monitored by three pressure sensors, PS1-3, which are installed at the bottom, center, and top of the duct, respectively, and the external pressure profile is obtained by PS4. The results show that the maximum internal overpressure (pmax) recorded by PS1-3 all increase with increasing Kv, but pmax obtained from PS2 and PS3 tend to increase linearly. For a given Kv, the maximum and minimum amplitudes of pmax are measured by PS1 and PS3, respectively. Specifically, the greater the distance between the pressure sensor and the upper opening, the greater the amplitude of pmax. The relationship between the maximum reduced explosion pressure (pred) and Kv is investigated, where pred is defined as the highest pmax for a specific Kv. As Kv increases from 2.2 to 11.9, pred increases from 26.25 kPa to 88 kPa. The maximum external flame velocity (Vext) increases from 83 m/s to 454 m/s with increasing Kv from 2.2 to 11.9. The amplitude of the maximum external overpressure (pext) first increases and decreases with an increase in Kv from 2.2 to 11.9. The formation time (Δt) of pext decreases and then increases and finally decreases with increasing Kv from 2.2 to 11.9. When Kv is increased from 2.2 to 4.1, all external fireballs are presented as mushroom shapes, but the external fireballs are gradually transformed into jet shapes for Kv ≥7.8. Two pressure oscillations, including Helmholtz oscillations and acoustic oscillations, are found. Acoustic oscillations are found in all tests, but Helmholtz oscillations are only observed for Kv ≤ 4.1. © 2024
Keyword ：
External explosion External explosion Flame Flame Nitrogen inerting Nitrogen inerting Vented H2/N2/air deflagration Vented H2/N2/air deflagration Vent size Vent size
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| GB/T 7714 | Huang, S. , Wang, F. , Xu, C. et al. Effect of vent size on vented H2/N2/air deflagration [J]. | International Journal of Hydrogen Energy , 2024 , 84 : 881-888 . |
| MLA | Huang, S. et al. "Effect of vent size on vented H2/N2/air deflagration" . | International Journal of Hydrogen Energy 84 (2024) : 881-888 . |
| APA | Huang, S. , Wang, F. , Xu, C. , Guo, J. , Mei, L. , Yang, Z. . Effect of vent size on vented H2/N2/air deflagration . | International Journal of Hydrogen Energy , 2024 , 84 , 881-888 . |
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Abstract ：
Explosion venting is the most commonly used technique to reduce the hazard from accidental deflagration of combustible gases. Since less attention is paid to the influence of inertial vent on vented H2/CH4/air deflagration, the effects of area density (Ws) of a hinged inertial cover on the pressure profile and flame behavior during H2/ CH4/air deflagration, with hydrogen volume fraction in fuel (chi H2) being 0.5 and 0.8, were investigated by covering the vent using aluminum plates with various thicknesses. The results show that the interval between ignition and the moment the flame just travels through the vent (tout) is almost independent of Ws, but the opening angle of the panel at the time of tout is closely related to Ws. For a given chi H2, the opening angle at the time of tout decreases with an increase in Ws. For a certain Ws, the opening angle of the panel is smaller for chi H2 = 0.8 in comparison with the tests at chi H2 = 0.5. In the test with higher Ws, the external fireball becomes more flattened. In tests at chi H2 = 0.5, p3 induced by acoustic oscillations dominates the internal overpressure, but p2 resulting from the external explosion becomes the dominant pressure peak at chi H2 = 0.8. The maximum reduced overpressure (pred) and maximum external overpressure (pext) are almost independent of Ws at chi H2 = 0.5. However, in tests at chi H2 = 0.8, pred and pext increase sharply with an increase in Ws from 0 kg/m2 to 2.7 kg/m2, but there is relatively little variation in pred and pext as Ws continues to increase from 2.7 kg/m2 to 24.3 kg/m2. Except for the test with Ws = 0 kg/m2, for a specific Ws, pred and pext at chi H2 = 0.8 are always greater than those at chi H2 = 0.5.
Keyword ：
Flame Flame Hinged vent panel Hinged vent panel Hydrogen/methane/air explosion Hydrogen/methane/air explosion Overpressure Overpressure
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| GB/T 7714 | Guo, Jin , Huang, Shikai , Wang, Fang et al. Effects of area density of a hinged inertial cover on H2/CH4/air deflagrations in a vented chamber [J]. | FUEL , 2024 , 374 . |
| MLA | Guo, Jin et al. "Effects of area density of a hinged inertial cover on H2/CH4/air deflagrations in a vented chamber" . | FUEL 374 (2024) . |
| APA | Guo, Jin , Huang, Shikai , Wang, Fang , Xu, Caijun , Wu, Zelong , Zhang, Fan et al. Effects of area density of a hinged inertial cover on H2/CH4/air deflagrations in a vented chamber . | FUEL , 2024 , 374 . |
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在突发事件发生后，应急物资短缺及分配不均等问题会使灾民产生心理焦虑，负面情绪的释放会进一步发酵成为负面舆情，进而影响应急救援效果。首先，构建以降低负面舆情为主、兼顾公平和效率的应急物资调度模型；其次，提出相对重要度优先、最短路径优先及比例分配3种调度策略；然后设计多目标改进算法和多目标传统算法求解模型；最后，以2022年上海疫情为参考进行案例求解分析。结果表明：(1)考虑舆情演化的调度模型可更均衡地满足各灾区的应急物资需求，各地区物资满足率均达到75%以上，能有效减缓负面情绪；(2)传统多目标算法求解时间较短但物资满足率较低，多目标改进算法耗时较长但物资满足率均达到70%以上；(3)采用“相对重要性优先策略”救援效果较好，各地区物资满足率达90%以上，采用“按比例分配策略”在救援初期能有效降低舆情影响。
Keyword ：
优化算法 优化算法 公共安全 公共安全 舆情演化 舆情演化 调度策略 调度策略 郎之万方程 郎之万方程
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| GB/T 7714 | 段在鹏 , 俞思雅 , 杨泽鸿 et al. 负面舆情演化下的应急物资优化调度研究 [J]. | 安全与环境学报 , 2024 , 24 (07) : 2776-2786 . |
| MLA | 段在鹏 et al. "负面舆情演化下的应急物资优化调度研究" . | 安全与环境学报 24 . 07 (2024) : 2776-2786 . |
| APA | 段在鹏 , 俞思雅 , 杨泽鸿 , 郭进 , 王照阳 . 负面舆情演化下的应急物资优化调度研究 . | 安全与环境学报 , 2024 , 24 (07) , 2776-2786 . |
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Experiments on the effects of ignition position and hydrogen ratio (chi) on the explosions of CH4/H-2/air mixtures were experimentally investigated in a vented cylindrical vessel. Relevant experiments were conducted utilizing ignition sources situated at the rear (rear ignition), the center of the vessel (central ignition), or near the vent (front ignition) with chi varying from 0 to 1.0. Two types of cellular structures on the flame surface, owing to the diffusional-thermal instability and acoustically enhanced combustion, respectively, were observed, and the latter resulted in acoustic oscillations of the overpressure within the vessel and a unique overpressure peak p(2) with amplitude sensitive to both ignition position and chi. The effects of ignition position and chi on the build-up of the internal pressure were not significant when chi <= 0.15. The maximum explosion overpressure in the vessel (p(max)) under the explosions of rear and central ignitions (RI and CI) increased monotonically as chi was increased from 0.3 to 1.0, but a nonmonotonic trend was found in the explosions of front ignition (FI). CI could be regarded as the worst-case scenario when 0.45 <=chi <= 1.0 except for chi = 0.7, because FI resulted in the highest p(max) at chi = 0.7. A pressure peak outside the vent (p(ext)) caused by the combustion expansion of the combustible cloud could be distinguished when chi >= 0.45 in the explosions of RI and CI. The amplitude of p(ext) increased with an increase in chi. Rear ignition always led to the highest p(ext) when chi > 0.6.
Keyword ：
CH4/H-2 blend CH4/H-2 blend Explosion venting Explosion venting Flame Flame Ignition position Ignition position Overpressure Overpressure
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| GB/T 7714 | Guo, Jin , Yang, Zexuan , Mei, Liang et al. Combined effects of ignition position and hydrogen ratio on vented CH4/H2/air explosions [J]. | JOURNAL OF LOSS PREVENTION IN THE PROCESS INDUSTRIES , 2024 , 90 . |
| MLA | Guo, Jin et al. "Combined effects of ignition position and hydrogen ratio on vented CH4/H2/air explosions" . | JOURNAL OF LOSS PREVENTION IN THE PROCESS INDUSTRIES 90 (2024) . |
| APA | Guo, Jin , Yang, Zexuan , Mei, Liang , Huang, Shikai , Wang, Haozhe . Combined effects of ignition position and hydrogen ratio on vented CH4/H2/air explosions . | JOURNAL OF LOSS PREVENTION IN THE PROCESS INDUSTRIES , 2024 , 90 . |
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In this study, the effects of hydrogen concentration (C) and vent size (AV) on the vented H2/air explosion in an obstructed duct were investigated using experimental methods and FLACS simulation software at an initial pressure and temperature of 101 kPa and 291K, respectively. A vent coefficient KA is chosen to represent AV to illustrate its influence on the explosion venting of H2/air. The results demonstrate that the maximum internal overpressure (pmax) and the maximum external overpressure (pext) increase and then decrease with C increasing from 10% to 60%. The highest pmax and pext are reached at C = 35% in experiments, but achieved at C = 30% in simulations because incomplete chemical reactions were not taken into account. In the tests with C <50%, the flame evolution inside the duct includes five stages: spherical flame, elliptical flame, finger-shaped flame, near-planar flame, and tulip-shaped flame. No tulip flame is observed for C ≥50%. FLACS can simulate the flame structure evolution for various C, but it cannot accurately simulate the flame propagation speed. FLACS overestimates the flame propagation speed in the tests with C ≤25%, but underestimates the flame propagation speed for C ≥35%. Under the initial condition of C = 15%, the above-mentioned five stages of flame evolution can be simulated by FLACS for KA ≤0.4; however, neither the near-plane nor tulip flame is observed in simulations for KA >0.4. © 2024
Keyword ：
Flame propagation Flame propagation Hydrogen Hydrogen Overpressure Overpressure Pressure oscillations Pressure oscillations Vented explosion Vented explosion
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| GB/T 7714 | Wang, F. , Huang, S. , Xu, C. et al. Experimental and numerical study on vented H2/air explosion in an obstructed duct: Effects of hydrogen concentration and vent size [J]. | International Journal of Hydrogen Energy , 2024 . |
| MLA | Wang, F. et al. "Experimental and numerical study on vented H2/air explosion in an obstructed duct: Effects of hydrogen concentration and vent size" . | International Journal of Hydrogen Energy (2024) . |
| APA | Wang, F. , Huang, S. , Xu, C. , Wang, C. , Guo, J. , Lin, J. . Experimental and numerical study on vented H2/air explosion in an obstructed duct: Effects of hydrogen concentration and vent size . | International Journal of Hydrogen Energy , 2024 . |
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The effects of the vent burst pressure (Pv) on the vented explosion of hydrogen-methane-air mixtures are investigated in a cylindrical vessel connected with a duct. The results demonstrate that Pv significantly affects the flame behaviors and overpressure inside and outside the venting configuration. The flame front velocity at the vent increases with Pv. Two pressure peaks, Pac, caused by the acoustically enhanced combustion, and Pse, caused by the secondary explosion, dominate within the vessel at Pv < 132 kPa and Pv >= 132 kPa, respectively. The maximum overpressure (Pmax) inside the duct increases with Pv. The maximum pressure rise (dp/dt) of the duct is always higher than that of the vessel. As Pv increases, increased turbulence of unburned gases within the duct results in higher dp/dt. Exit flame speed increases with Pv. When Pv >= 153 kPa, "Mach disk" appears outside the relief duct. Three pressure peaks, Pa, Pb, and Pext, due to vent failure, the secondary explosion, and the external explosion, respectively, occur in the external pressure curve. Pb dominates outside the configuration except for Pv = 153 kPa.
Keyword ：
Duct-vented explosion Duct-vented explosion Explosion overpressure Explosion overpressure Hydrogen/methane/air mixture Hydrogen/methane/air mixture Reverse flow Reverse flow Vent burst pressure Vent burst pressure
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| GB/T 7714 | Yang, Zexuan , Wang, Fang , Xu, Caijun et al. Effects of the vent burst pressure on the duct-vented explosion of hydrogen-methane-air mixtures [J]. | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY , 2024 , 67 : 776-785 . |
| MLA | Yang, Zexuan et al. "Effects of the vent burst pressure on the duct-vented explosion of hydrogen-methane-air mixtures" . | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 67 (2024) : 776-785 . |
| APA | Yang, Zexuan , Wang, Fang , Xu, Caijun , Guo, Jin , Mei, Liang , Huang, Shikai . Effects of the vent burst pressure on the duct-vented explosion of hydrogen-methane-air mixtures . | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY , 2024 , 67 , 776-785 . |
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In this work, the coupling of explosion venting (vent size) and inerting (N2) on H2/air deflagration was investigated. Experiments were carried out in a vertical rectangular duct with an upper opening at an initial temperature and pressure of 280 K and 101 kPa, and a vent coefficient Kv was employed to replace the vent size to elucidate its effect on pressure buildup and flame propagation during H2/N2/air deflagration. In the present study, the internal pressure profile is monitored by three pressure sensors, PS1-3, which are installed at the bottom, center, and top of the duct, respectively, and the external pressure profile is obtained by PS4. The results show that the maximum internal overpressure (pmax) recorded by PS1-3 all increase with increasing Kv, but pmax obtained from PS2 and PS3 tend to increase linearly. For a given Kv, the maximum and minimum amplitudes of pmax are measured by PS1 and PS3, respectively. Specifically, the greater the distance between the pressure sensor and the upper opening, the greater the amplitude of pmax. The relationship between the maximum reduced explosion pressure (pred) and Kv is investigated, where pred is defined as the highest pmaxfor a specific Kv. As Kv increases from 2.2 to 11.9, pred increases from 26.25 kPa to 88 kPa. The maximum external flame velocity (Vext) increases from 83 m/s to 454 m/s with increasing Kvfrom 2.2 to 11.9. The amplitude of the maximum external overpressure (pext) first increases and decreases with an increase in Kvfrom 2.2 to 11.9. The formation time (Delta t) of pext decreases and then increases and finally decreases with increasing Kvfrom 2.2 to 11.9. When Kv is increased from 2.2 to 4.1, all external fireballs are presented as mushroom shapes, but the external fireballs are gradually transformed into jet shapes for Kv >= 7.8. Two pressure oscillations, including Helmholtz oscillations and acoustic oscillations, are found. Acoustic oscillations are found in all tests, but Helmholtz oscillations are only observed for Kv <= 4.1.
Keyword ：
External explosion External explosion Flame Flame Nitrogen inerting Nitrogen inerting Vent size Vent size
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| GB/T 7714 | Huang, Shikai , Wang, Fang , Xu, Caijun et al. Effect of vent size on vented H2/N2/air deflagration [J]. | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY , 2024 , 84 : 881-888 . |
| MLA | Huang, Shikai et al. "Effect of vent size on vented H2/N2/air deflagration" . | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 84 (2024) : 881-888 . |
| APA | Huang, Shikai , Wang, Fang , Xu, Caijun , Guo, Jin , Mei, Liang , Yang, Zexuan . Effect of vent size on vented H2/N2/air deflagration . | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY , 2024 , 84 , 881-888 . |
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