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学者姓名：郭进
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Abstract ：
为了氢气‑甲烷混合燃料的安全使用，利用内径和长度皆为300 mm的圆柱形密闭容器进行爆炸实验，研究了掺氢比（XH2=0~100%）和当量比（Φ=0.6~1.4）对火焰演化和爆炸压力特性的影响，并采用CHEMKIN软件分析了氢气‑甲烷‑空气预混气体的层流燃烧速度及其敏感性。结果表明，在当量比（Φ）不变的情况下，随着掺氢比（XH2）的增加，最大爆炸压力（pmax）、最大压力上升速率（（dp/dt）max）、爆炸指数（KG）以及层流燃烧速度增大，到达最大压力和最大压力上升速率的时间（tA和tB）逐渐缩短。点火后，火焰表面由最初的较为光滑，逐步形成蜂窝状的火焰胞格结构。在相同当量比（Φ）下，随着掺氢比（XH2）的增加，从点火到爆炸结束的时间大幅缩短，且在同一时刻，火焰半径增大，火焰表面皱褶增多。反应敏感性计算结果表明，基元反应H+O2⇌O+OH（R38）和H+CH3（+M）⇌CH4（+M）（R52）对层流燃烧速度的影响最大；关键自由基（H·、O·、OH·）的最大摩尔分数与层流燃烧速度正相关，且掺氢比（XH2）的增加，使得关键自由基的最大摩尔分数显著增大；基元反应R38和R84是影响关键自由基生成速率（ROP）的最主要反应。
Keyword ：
化学动力学分析 化学动力学分析 层流燃烧速度 层流燃烧速度 掺氢甲烷 掺氢甲烷 火焰 火焰 爆炸压力 爆炸压力
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| GB/T 7714 | 梅亮 , 郭进 , 黄时凯 et al. 密闭容器内氢气‑甲烷‑空气的爆炸特性 [J]. | 含能材料 , 2025 : 1-12 . |
| MLA | 梅亮 et al. "密闭容器内氢气‑甲烷‑空气的爆炸特性" . | 含能材料 (2025) : 1-12 . |
| APA | 梅亮 , 郭进 , 黄时凯 , 王金贵 , 高毅 . 密闭容器内氢气‑甲烷‑空气的爆炸特性 . | 含能材料 , 2025 , 1-12 . |
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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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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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To investigate the microwave heating mechanism of composite minerals, a circumferential stirring model based on the Arbitrary Lagrangian-Eulerian (ALE) method was established by COMSOL Multiphysics software. This model aims to study the temperature rise characteristics of mineral models with different component structures and proportions. The results show that the heating efficiency and uniformity of the mineral are higher in the stirred heating model with a 5 cm copper disc rotating at (π/3) rad/s compared to the non-stirred heating model; The different component structures of the composite mineral result in different electromagnetic wave distributions, which induces the microwave heating efficiency of the py-rite-enclosed calcite model is lower than the calcite-enclosed pyrite model; In the calcite-en-closed pyrite model, the variation of pyrite thickness changes the phase of electromagnetic wave, leading to the displacement of hot and cold spots in the mineral. Furthermore, when comparing the pyrite thicker and thinner than the penetration depth, there is a significant disparity in the incident electromagnetic wave intensity, resulting in noticeable differences in electric field strength; At the same component proportion, the overall electric field of heterogeneous minerals is lower and more stable, and the electric field intensity between components is closer than in composite homogeneous minerals; With the proportion of pyrite increases, the temperature variation of heterogeneous minerals after 30 s microwave heating can be divided into three regions: small peak region (0-10%), large peak region (10% - 50%), and stable region (50% - 75%), and the temperature differences between components gradually decrease. © 2024 China University of Mining and Technology. All rights reserved.
Keyword ：
Calcite Calcite Circular waveguides Circular waveguides Efficiency Efficiency Electric fields Electric fields Electromagnetic waves Electromagnetic waves Microwave heating Microwave heating Mining Mining Pyrites Pyrites
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| GB/T 7714 | Long, Shengyi , Hong, Yidu , Sun, Xiaowan et al. Microwave heating temperature rise characteristics of composite minerals under the circumferential stirring model [J]. | Journal of China University of Mining and Technology , 2024 , 53 (2) : 318-333 . |
| MLA | Long, Shengyi et al. "Microwave heating temperature rise characteristics of composite minerals under the circumferential stirring model" . | Journal of China University of Mining and Technology 53 . 2 (2024) : 318-333 . |
| APA | Long, Shengyi , Hong, Yidu , Sun, Xiaowan , Yang, Fuqiang , Guo, Jin , Nie, Wen . Microwave heating temperature rise characteristics of composite minerals under the circumferential stirring model . | Journal of China University of Mining and Technology , 2024 , 53 (2) , 318-333 . |
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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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Although ammonia as a carbon-free fuel is regarded as an energy source worthy of significant development, how to address the shortcomings of its poor combustion properties has been a hot topic of research. Hydrogen enrichment is a promising solution to improve the combustion properties of ammonia, but at the same time, the potential explosion risk will inevitably be raised. In this paper, the effects of hydrogen volumetric fraction (chi) in NH3/H-2 on the NH3/H-2/air deflagrations were experimentally investigated in a rectangular duct with an end-opening at an initial pressure and temperature of 101 kPa and 298 K, where chi was varied from 0.1 to 0.9. Results demonstrate that flame propagation and overpressure profiles inside and outside the chamber depend on chi. Buoyancy plays a significant role in flame propagation at chi = 0.1. More prominent deformation of the flame front propagating toward the closed end (CE) was observed in the experiments with higher chi s. Helmholtz oscillations of the flame occurred in all tests, which resulted in pressure oscillations with a decreasing frequency as chi was increased. Acoustically enhanced combustion of NH3/H-2/air remained at the CE, appeared when chi >= 0.7, and acoustic-type oscillations of the internal explosion overpressure and a pressure peak of p(2) formed in these tests. The amplitude of p(2) dropped as chi varied from 0.7 to 0.9. A proportional relationship between the highest explosion overpressure inside the chamber (p(max)) and the square of the laminar burning velocity of NH3/H-2/air (s(l)(2)). When chi >= 0.3, a dominant pressure peak (p(ext)) caused by the external explosion appeared in the external overpressure profiles, and its amplitude increased as chi varied from 0.3 to 0.9.
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| GB/T 7714 | Huang, Shikai , Guo, Jin , Mei, Liang et al. Experiments on the Vented Ammonia-Hydrogen-Air Deflagrations under Various Hydrogen Volume Fractions [J]. | ENERGY & FUELS , 2024 , 38 (10) : 9110-9119 . |
| MLA | Huang, Shikai et al. "Experiments on the Vented Ammonia-Hydrogen-Air Deflagrations under Various Hydrogen Volume Fractions" . | ENERGY & FUELS 38 . 10 (2024) : 9110-9119 . |
| APA | Huang, Shikai , Guo, Jin , Mei, Liang , Yang, Zexuan . Experiments on the Vented Ammonia-Hydrogen-Air Deflagrations under Various Hydrogen Volume Fractions . | ENERGY & FUELS , 2024 , 38 (10) , 9110-9119 . |
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In this study, experiments were conducted in a 1 m -long horizontal rectangular duct at an initial temperature of 285 K and an initial pressure of 100 kPa to investigate the influence of ignition position and hydrogen fraction (x) on the vented deflagration of NH3/H-2/air. A range of x from 0.1 to 0.9, as well as three ignition positions, including FI (front ignition), CI (central ignition), and RI (rear ignition), were employed. It was indicated that the ignition position and x remarkably influenced on the overpressure accumulation and flame evolution inside and outside the duct. With x increasing from 0.1 to 0.9, the maximum explosion overpressure (p(max)) and the maximum external overpressure increased with x at three ignition positions. As x increased from 0.1 to 0.9, p(max) increased from 7 kPa to 22 kPa at FI, from 13 kPa to 50 kPa at CI, and from 13 kPa to 33 kPa at RI. With x increasing from 0.1 to 0.9, the maximum external overpressure increased from 0.15 kPa to 4 kPa in the case of FI, from 0.43 kPa to 16.36 kPa in the case of CI, and from 1 kPa to 35.58 kPa in the case of RI. Left flame front deformation owing to R -T instability was found and was the most severe at FI. In rear ignition explosions, the flame always propagates toward the opening end as x > 0.5, but when x <= 0.5, the flame front may transiently move away from the opening. In the case of RI, the shape of the external combustible cloud transferred from a "mushroom" to a "dumbbell" as x increased from 0.5 to 0.9. Two types of oscillations (Helmholtz -type and acoustic oscillations) could be found. As x increased from 0.3 to 0.7, the Helmholtz -type oscillations could be easily distinguished in the cases of FI and CI. As x increased from 0.3 to 0.7, the frequency of Helmholtz -type oscillations increased from 125 Hz at x = 0.3-140 Hz at x = 0.5-150 Hz at x = 0.7 in the case of FI and from 135 Hz at x = 0.3-160 Hz at x = 0.5-170 Hz at x = 0.7 in the case of CI. Acoustic oscillations could only be observed in tests with x >= 0.7 and were the most intense when x = 0.7.
Keyword ：
Flame Flame Ignition position Ignition position NH 3 /H 2 /air deflagration NH 3 /H 2 /air deflagration Overpressure Overpressure Pressure oscillation Pressure oscillation
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| GB/T 7714 | Huang, Shikai , Guo, Jin , Mei, Liang et al. Study on the deflagrations of NH3/H2/air in an end-open duct: Effects of ignition position and hydrogen fraction [J]. | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY , 2024 , 60 : 55-65 . |
| MLA | Huang, Shikai et al. "Study on the deflagrations of NH3/H2/air in an end-open duct: Effects of ignition position and hydrogen fraction" . | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 60 (2024) : 55-65 . |
| APA | Huang, Shikai , Guo, Jin , Mei, Liang , Yang, Zexuan . Study on the deflagrations of NH3/H2/air in an end-open duct: Effects of ignition position and hydrogen fraction . | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY , 2024 , 60 , 55-65 . |
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The effect of inertial vent covers on deflagrations of fast-burning gases, such as hydrogen, has received limited attention, and recommendations for their safe venting are unavailable. To this end, experiments on vented explosion of H 2 /air mixtures, ignited from the center of a 1-m 3 chamber with a top vent covered by hinged aluminum plates of various surface densities ( W s ), were performed at initial temperatures and pressures of 290 K and 100 kPa to investigate the effects of W s on the flame evolution and pressure profile within and outside the vented vessel. Three pressure sensors (PS1-PS3) were used to record internal overpressure and another pressure sensor (PS4) was employed to monitor external overpressure. Current tests showed some unexpected results, which were inconsistent with previous research and available models. In this study, P max , P red , and P ext are focused on; P max refers to the maximum internal overpressure recorded by PS1-PS3, P red represents the highest P max monitored by PS1-PS3 for a certain W s , and P ext denotes the maximum external overpressure obtained by PS4. Experimental results reveal that for a given W s , the highest and lowest P max are always observed at the bottom and the center of the chamber, respectively. With the increase of W s from 0 to 18.9, P ext first increases and then decreases, and it reaches its highest value when W s is increased to 8.1 kg/m 2 . As W s increases from 0 to 18.9, P red first increases with W s and reaches its maximum of 93 kPa at W s = 8.1 kg/m 2 and thereafter decreases when W s is increased to 13.5 kg/m 2 , and a further increase in W s has a negligible effect on P red . In comparison with an inertia-free vent cover, when a hinged vent panel is used, the external fireball looks more oblate, and the maximum flame length decreases with increasing W s . The results of the study can provide a valuable reference for the explosion-proof design of inertial vent covers and hydrogen explosion risk assessment.
Keyword ：
Flame Flame Inertial vent cover Inertial vent cover Overpressure Overpressure Surface density Surface density VentedH2/air explosion VentedH2/air explosion
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| GB/T 7714 | Huang, Shikai , Wang, Fang , Xu, Caijun et al. Experiments on vented H 2 /air explosions with a hinged vent panel: Effects of surface density [J]. | JOURNAL OF LOSS PREVENTION IN THE PROCESS INDUSTRIES , 2024 , 91 . |
| MLA | Huang, Shikai et al. "Experiments on vented H 2 /air explosions with a hinged vent panel: Effects of surface density" . | JOURNAL OF LOSS PREVENTION IN THE PROCESS INDUSTRIES 91 (2024) . |
| APA | Huang, Shikai , Wang, Fang , Xu, Caijun , Guo, Jin , Zhang, Fan , Wu, Zelong et al. Experiments on vented H 2 /air explosions with a hinged vent panel: Effects of surface density . | JOURNAL OF LOSS PREVENTION IN THE PROCESS INDUSTRIES , 2024 , 91 . |
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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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