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学者姓名：王金贵
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Abstract ：
To mitigate the damage caused by methane explosions, this paper conducts experiments on methane explosion suppression by CO2 and air (for comparison)-driven NaHCO3 powder using a 1 m3 spherical explosion test system. The results indicate that the explosion suppression effect was gradually enhanced with the increase of NaHCO3 powder concentration. Driven by air, as the concentration of NaHCO3 powder increases, the flame becomes darker and the propagation speed slows down. After adding 700 g/m3 NaHCO3 powder, methane cannot be ignited. The significant concentration range for explosion suppression efficiency is between 200 g/m3 and 500 g/m3. Driven by CO2, the flame evolves more slowly, the flame shape is more irregular, and the flame brightness is lower. Compared with air propulsion, the required NaHCO3 powder for complete explosion suppression is reduced by 100 g/m3, and the required NaHCO3 for related explosion suppression effects is reduced by 100 g/m3. The explosion suppression effect of CO2 driven NaHCO3 powder is superior to the sum of the suppression effects of high-pressure CO2 gas injection and air driven NaHCO3 powder. The explosion suppression effect of CO2 enables NaHCO3 powder to fully decompose and exert the best inhibitory effect; The CO2 generated by the decomposition of NaHCO3 can further enhance the suppression effect of CO2, and the two can thus produce a synergistic inhibitory effect.
Keyword ：
CO2 CO2 Explosion pressure Explosion pressure Explosion suppression mechanism Explosion suppression mechanism Methane explosion suppression Methane explosion suppression NaHCO3 powder NaHCO3 powder
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| GB/T 7714 | Wang, Jingui , Chen, Jianjun , Zhu, Hangqin et al. Experimental study on methane explosion suppression by CO2-driven NaHCO3 powder [J]. | FUEL , 2025 , 386 . |
| MLA | Wang, Jingui et al. "Experimental study on methane explosion suppression by CO2-driven NaHCO3 powder" . | FUEL 386 (2025) . |
| APA | Wang, Jingui , Chen, Jianjun , Zhu, Hangqin , Xue, Shaojun , Zhang, Su . Experimental study on methane explosion suppression by CO2-driven NaHCO3 powder . | FUEL , 2025 , 386 . |
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The explosive properties of methane-ethane mixtures with different concentrations and ethane proportions (phi value) were studied in a 1 m(3) spherical vessel, along with the inhibitory effects of N-2 and CO2. The results indicate that when the concentration of the total gas mixture was 10%, P-max and (dp/dt)(max) first increased and then decreased with the increase of phi. In contrast, for total gas mixture concentrations of 8% and 12%, P-max and (dp/dt)(max) showed a single change. Under the test conditions of this experiment, P-max reached its maximum value when the total gas mixture concentration was 10% and phi = 0.1. The explosion suppression of gas mixtures showed that both N-2 and CO2 could significantly reduce P-max and (dp/dt)(max) when their volume fractions increased to 9%. While the continued addition of N-2 and CO2 did not significantly reduce P-max and (dp/dt)(max), it further delayed the arrival time of the peak, with a greater magnitude of delay for CO2. Regarding the flame propagation process, the same volume fraction of CO2 can reduce the flame propagation speed more effectively, and the bottom of the flame is more significantly affected by buoyancy instability.
Keyword ：
explosion pressure explosion pressure flame propagation flame propagation gas mixtures gas mixtures inert inhibitory gas inert inhibitory gas
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| GB/T 7714 | Wang, Jingui , Hu, Xingwang , Hu, Qiangqiang et al. Experimental study on the effects of N2 and CO2 inerting on methane-ethane-air deflagrations [J]. | PROCESS SAFETY PROGRESS , 2025 . |
| MLA | Wang, Jingui et al. "Experimental study on the effects of N2 and CO2 inerting on methane-ethane-air deflagrations" . | PROCESS SAFETY PROGRESS (2025) . |
| APA | Wang, Jingui , Hu, Xingwang , Hu, Qiangqiang , Liang, Zhixing , Zhang, Su . Experimental study on the effects of N2 and CO2 inerting on methane-ethane-air deflagrations . | PROCESS SAFETY PROGRESS , 2025 . |
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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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A crucial industry for improving society's sustainable development is the power sector. To address issues with the ineffectiveness of electric power emergency response during emergencies and the unclear division of duty among emergency subjects. A prefecture-level city power supply company to respond to the "In-Fa" typhoon, for example, to build a "1 + N" two-level emergency rapid response unit. Furthermore, it is proposed from the emergency response, emergency coordination, emergency material reserves, etc., to build a "full-chain" type of power emergency quick reaction system. Case studies have revealed that the quick response system's emergency combat capability, catastrophe preventive and mitigation capability, and emergency security capability have all improved. The construction of a "full-chain" type of power emergency rapid response system specialized and standardized the power emergency response system and provided a reference basis for the power industry's emergency response.
Keyword ：
Electric power system Electric power system Emergency quick response Emergency quick response Internal and external coordination Internal and external coordination Multi -linkage Multi -linkage Standardization Standardization
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| GB/T 7714 | Zhang, Su , Liu, Xiaolu , Wang, Jingui . Research on the construction of a "full-chain" rapid response system for power emergencies [J]. | HELIYON , 2024 , 10 (4) . |
| MLA | Zhang, Su et al. "Research on the construction of a "full-chain" rapid response system for power emergencies" . | HELIYON 10 . 4 (2024) . |
| APA | Zhang, Su , Liu, Xiaolu , Wang, Jingui . Research on the construction of a "full-chain" rapid response system for power emergencies . | HELIYON , 2024 , 10 (4) . |
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Abstract ：
以牡蛎壳粉部分替换传统水泥基材料,在实现牡蛎壳废物利用的同时可有效降低建材成本.利用牡蛎壳粉作为普通硅酸盐水泥掺合料,探讨其不同掺杂量及不同粉磨方式对水泥胶砂强度及安定性的影响,确定了牡蛎壳粉的适宜添加量,并用XRD、SEM及EDS等测试分析手段表征不同掺量下胶凝试块的结构及性能变化.实验结果表明,牡蛎壳的球磨方式对水泥胶砂强度有明显影响,掺加湿法球磨牡蛎壳粉的胶凝材料的强度高于相应的掺加干法球磨的样品.牡蛎壳粉的掺加量为5%时,试样的抗压强度和抗折强度分别达到49.2 MPa和7.55 MPa,显著高于未掺加的空白样品.通过安定性实验制得的试样经过预养、沸煮之后,表面均光滑、无裂纹,体积无明显膨胀或收缩,表明掺杂牡蛎壳粉的胶凝材料安定性良好.微观结构表征结果显示牡蛎壳粉在水泥胶凝材料中独立存在,主要起惰性填充作用.利用牡蛎壳微粉部分替代水泥基材料是可行的,既可以改善水泥基材料综合性能,又能节约材料成本、减少环境污染,具有良好的应用前景.
Keyword ：
安定性 安定性 抗压强度 抗压强度 抗折强度 抗折强度 牡蛎壳粉 牡蛎壳粉
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| GB/T 7714 | 钟彬扬 , 梁玉兰 , 陈志杰 et al. 牡蛎壳微粉改性水泥基复合材料性能及微观结构研究 [J]. | 无机盐工业 , 2024 , 56 (10) : 135-140 . |
| MLA | 钟彬扬 et al. "牡蛎壳微粉改性水泥基复合材料性能及微观结构研究" . | 无机盐工业 56 . 10 (2024) : 135-140 . |
| APA | 钟彬扬 , 梁玉兰 , 陈志杰 , 廖启华 , 王金贵 . 牡蛎壳微粉改性水泥基复合材料性能及微观结构研究 . | 无机盐工业 , 2024 , 56 (10) , 135-140 . |
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To investigate the effects of ignition position on the explosion of non-uniform methane-air mixtures, experiments were carried out in a closed pipe of 1 m length and 0.3m x 0.3 m cross-section. Methane is uniformly charged at the top of the pipe and then diffused freely, creating a concentration gradient. The concentration gradient of the methane-air mixture depends on the diffusion time. The effects of the three ignition positions - top (IP1), center (IP2) and bottom (IP3) - on the flame propagation at different ignition delay time (tig) were investigated. The ignition position and tig are the key factors influencing the success of ignition. For IP2 and IP3, the flame propagation velocity increases with the increase of tig, but the flame propagation velocity at IP1 does not change significantly with an increase in tig. When tig <= 25min, the temperature (Tmax) and maximum overpressure (Pmax) in the pipe at IP1 are significantly higher than those at IP2 and IP3. When the methane-air mixtures are nearly uniform, the Tmax and Pmax at different ignition locations are almost identical. The maximum pressure rise rate, (dP/dt)max, was affected by the flame pipe collision and different flame shapes caused by the ignition position.
Keyword ：
Concentration gradient Concentration gradient Explosion Explosion Flame Flame Ignition position Ignition position Methane Methane
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| GB/T 7714 | Zhang, Hanwen , Guo, Jin , Wang, Jingui et al. Effects of ignition position on the explosion of methane-air mixtures with concentration gradients [J]. | JOURNAL OF LOSS PREVENTION IN THE PROCESS INDUSTRIES , 2023 , 85 . |
| MLA | Zhang, Hanwen et al. "Effects of ignition position on the explosion of methane-air mixtures with concentration gradients" . | JOURNAL OF LOSS PREVENTION IN THE PROCESS INDUSTRIES 85 (2023) . |
| APA | Zhang, Hanwen , Guo, Jin , Wang, Jingui , Wu, Jiahan , Wang, Haozhe . Effects of ignition position on the explosion of methane-air mixtures with concentration gradients . | JOURNAL OF LOSS PREVENTION IN THE PROCESS INDUSTRIES , 2023 , 85 . |
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In this paper, the flame evolution and pressure dynamics of hydrogen-nitrogen-air explosions with nitrogen addition ratio (chi) ranging from 0 to 40 %, ignited at three different positions ("central", "back" or "front" with respect to the vent) in a vented cylindrical vessel, were experimentally studied. Experimental results reveal that the coupling effects of chi and ignition position significantly affect the pressure curves and flame behavior within and outside the vessel. The higher the chi, the smoother the internal flame captured by a high-speed schlieren system. When chi<30 %, the maximum reduced overpressure (P-max) at different ignitions decreases with increasing chi, and the central explosion yields the best suppression of P-max: when chi is increased from 0 to 30 %, P-max monotonically decreases from 232 kPa to 38 kPa. However, the differences in P-max among the three ignition positions become negligible when chi >= 30 %. The structure of the pressure peaks and the types of oscillations measured near the vent depend on the combinations of ignition location and chi. The formation of a shock wave generated by the external explosion and its effect on the internal pressure-time histories are described. In general, for a given ignition, the maximum external overpressure (Pe-max) decreases with chi is increased. The most pronounced decreasing trend of Pe-max is consistently observed in back explosions when chi ranging from 0 to 40 %. Furthermore, compared to other ignition positions, the highest P-max is always attained in central-ignition with chi<30 %; while the highest Pe-max is always attained in back-ignition with chi <= 30 %; as chi >= 10 %, both P-max and Pe-max recorded at front-ignitions are almost insensitive to chi.
Keyword ：
Explosion venting Explosion venting Hydrogen safety Hydrogen safety Nitrogen dilution Nitrogen dilution Overpressure Overpressure
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| GB/T 7714 | Zhang, Kai , Wang, Jingui , Guo, Jin et al. Experimental study of the coupling effects of ignition position and nitrogen inerting on vented hydrogen-air deflagrations [J]. | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY , 2023 , 50 : 1288-1295 . |
| MLA | Zhang, Kai et al. "Experimental study of the coupling effects of ignition position and nitrogen inerting on vented hydrogen-air deflagrations" . | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 50 (2023) : 1288-1295 . |
| APA | Zhang, Kai , Wang, Jingui , Guo, Jin , Du, Saifeng , Chen, Hao , Wang, Hongyan et al. Experimental study of the coupling effects of ignition position and nitrogen inerting on vented hydrogen-air deflagrations . | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY , 2023 , 50 , 1288-1295 . |
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The explosion venting experiments of hydrogen-air premixed gas were carried out in a 1-m3 cuboid container. The effects of the obstacles parallel to the vent on the structural response of the container during the explosion venting were investigated. The internal overpressure and acceleration of the vessel wall were captured by acceleration and pressure sensors, respectively. The time-frequency distributions of pressure and acceleration were obtained by a Short-Time Fast Fourier Transform. The effects of obstacles on the dynamic structure response were studied by analyzing the internal overpressure, vibration acceleration, and high-speed videos. With the increase of obstacles, the maximum overpressure and vessel vibration increased, and the maximum overpressure and maximum vibration acceleration appeared earlier. The vibration signals had two dominant frequencies, 300-600 Hz and 900-1200 Hz. The low-frequency vibration (300-600 Hz) was induced by acoustic oscillation of the internal pressure. The high-frequency vibration (900-1200 Hz) was a container resonance triggered by the coupling of the flame and the acoustic wave. As VBR increased, the duration of high-frequency oscillations decreased gradually; the increase of obstacles would weaken the high-frequency structural response of the container. The results can guide the design of hydrogen explosion protection and mitigation measures.
Keyword ：
obstacle obstacle structural response structural response vented hydrogen-air explosion vented hydrogen-air explosion vibration vibration
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| GB/T 7714 | Wang, Jingui , Liang, Zhixing , Lin, Jiacheng et al. Structural response for vented hydrogen-air deflagrations: Effects of volumetric blockage ratio [J]. | PROCESS SAFETY PROGRESS , 2023 , 43 : S284-S292 . |
| MLA | Wang, Jingui et al. "Structural response for vented hydrogen-air deflagrations: Effects of volumetric blockage ratio" . | PROCESS SAFETY PROGRESS 43 (2023) : S284-S292 . |
| APA | Wang, Jingui , Liang, Zhixing , Lin, Jiacheng , Feng, Hong , Zhang, Su . Structural response for vented hydrogen-air deflagrations: Effects of volumetric blockage ratio . | PROCESS SAFETY PROGRESS , 2023 , 43 , S284-S292 . |
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Experiments were performed in a 90-L vessel with a side vent to investigate the effects of transverse concentration gradients on the vented explosion of non-uniform methane-air mixture. Controlled by a mass flow meter, methane was injected uniformly into the vessel through 18 nozzles that are evenly distributed at the top to configure a methane-air mixture with an average methane volume fraction of 10.9%. Various transverse con-centration gradients were obtained by altering the free diffusion time of the methane in the vessel. The deflagration flame was recorded through a high-speed camera at a frequency of 1000 Hz, and the internal overpressure at different locations was captured through three piezoelectric sensors. Experimental results reveal that larger concentration gradient resulted in lower flame propagation rate, longer time for the burst of the vent cover, and stronger pressure oscillations. Concentration gradient affects the typical flame structure, especially the formation and development of the tulip flame. Under the present experimental conditions, Helmholtz oscillations occurred in all tests. Concentration gradient has a negative correlation with the frequency of Helmholtz oscillations but a positive correlation with the duration of oscillations. In conclusion, the variation of concentration gradient obviously affects flame propagation and pressure evolution during vented explosions, which deserves more attention in the design of explosion protection.
Keyword ：
Helmholtz oscillation Helmholtz oscillation Methane-air mixture Methane-air mixture Transverse concentration gradient Transverse concentration gradient Vented explosion Vented explosion
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| GB/T 7714 | Wu, Jiahan , Wang, Jingui , Guo, Jin et al. Effects of transverse concentration gradients on the vented explosion of methane-air mixtures [J]. | JOURNAL OF LOSS PREVENTION IN THE PROCESS INDUSTRIES , 2023 , 86 . |
| MLA | Wu, Jiahan et al. "Effects of transverse concentration gradients on the vented explosion of methane-air mixtures" . | JOURNAL OF LOSS PREVENTION IN THE PROCESS INDUSTRIES 86 (2023) . |
| APA | Wu, Jiahan , Wang, Jingui , Guo, Jin , Zhang, Hanwen , Wang, Haozhe . Effects of transverse concentration gradients on the vented explosion of methane-air mixtures . | JOURNAL OF LOSS PREVENTION IN THE PROCESS INDUSTRIES , 2023 , 86 . |
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The effects of vent area on pressure and flame evolution in a 1 m(3) vessel with and without obstacles were investigated. Five pressure peaks of P-open, P-out, P-ext, P-hel, and P-vib, which correspond to vent activation, flame venting, external explosion, Helmholtz oscillation, and the coupling of acoustic waves and flames, respectively, were observed without obstacles when the vent coefficient K-v <= 6.25. However, the pressure peaks of P-ext and P-out from the external explosion and flame venting disappeared when K-v > 6.25. Moreover, the pressure peaks of P-open and P-vib produced by vent activation and acoustically enhanced combustion become dominant when K-v > 12.5. With the installation of obstacles, the pressure peak P-vib induced by acoustically enhanced combustion disappeared. The other four pressure peaks were observed when K-v < 6.25. The pressure peaks induced by the external explosion and the Helmholtz oscillation disappeared when K-v > 12.5. Nevertheless, the pressure peak resulting from the obstacles was observed and became dominant at K-v > 12.5. It takes less time for the external flame to propagate to the maximum displacement in the tests with obstacles than that without obstacles, and the maximum flame length for the former is smaller than the latter.
Keyword ：
Explosion venting Explosion venting Helmholtz oscillation Helmholtz oscillation Methane Methane Safety Safety
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| GB/T 7714 | Rui, Shengchao , Wang, Qiao , Chen, Feng et al. Effect of vent area on the vented methane-air deflagrations in a 1 m(3) rectangular vessel with and without obstacles [J]. | JOURNAL OF LOSS PREVENTION IN THE PROCESS INDUSTRIES , 2022 , 74 . |
| MLA | Rui, Shengchao et al. "Effect of vent area on the vented methane-air deflagrations in a 1 m(3) rectangular vessel with and without obstacles" . | JOURNAL OF LOSS PREVENTION IN THE PROCESS INDUSTRIES 74 (2022) . |
| APA | Rui, Shengchao , Wang, Qiao , Chen, Feng , Li, Quan , Guo, Jin , Wang, Jingui et al. Effect of vent area on the vented methane-air deflagrations in a 1 m(3) rectangular vessel with and without obstacles . | JOURNAL OF LOSS PREVENTION IN THE PROCESS INDUSTRIES , 2022 , 74 . |
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