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学者姓名：王金贵
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Abstract ：
密闭容器内预混气体爆炸非常复杂，为研究点火位置对甲烷/空气预混气体爆炸特性的影响，在初始压力为101 kPa和初始温度为300 K的环境下，开展1 m~3密闭球形爆炸容器中10 vol%甲烷浓度的中心点火爆炸实验，并使用Fluent数值模拟软件，采用LES湍流模型和Zimont燃烧模型，研究不同点火位置(中心点火、0.5R点火、R点火)对容器内甲烷/空气预混气体爆炸特性的影响，包括火焰结构演化、爆炸温度、爆炸压力、爆炸压力上升速率。结果表明：(1)在中心、0.5R和R处点火时，火焰分别向四周膨胀直至容器壁面、轮廓由最初的“左薄右厚”逐渐转变为“左侧凸起的尖角”和在壁面处从“圆弧形”逐渐拉伸转变成“尖形”向左侧发展；(2)不同点火位置下温度场存在温度梯度，升温规律均由点火中心能量持续向外释放，温度不断积聚升高；(3)不同点火位置下爆炸压力变化趋势基本一致，由于壁面绝热，最终最大爆炸压力均稳定在766 kPa左右；(4)中心点火时最大爆炸压力上升速率最大，较0.5R点火和R处点火分别增大了94.5%和141.8%。
Keyword ：
大涡模拟 大涡模拟 密闭球形容器 密闭球形容器 火焰前锋 火焰前锋 点火位置 点火位置 甲烷/空气预混气体 甲烷/空气预混气体
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| GB/T 7714 | 王金贵 , 梁志星 , 胡强强 et al. 点火位置对甲烷/空气预混爆炸特性影响的数值模拟研究 [J]. | 爆破 , 2024 , 41 (01) : 186-195 . |
| MLA | 王金贵 et al. "点火位置对甲烷/空气预混爆炸特性影响的数值模拟研究" . | 爆破 41 . 01 (2024) : 186-195 . |
| APA | 王金贵 , 梁志星 , 胡强强 , 朱杭钦 , 胡超 , 魏林慧 . 点火位置对甲烷/空气预混爆炸特性影响的数值模拟研究 . | 爆破 , 2024 , 41 (01) , 186-195 . |
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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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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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燃烧学是安全工程专业的一门理论性强、难度大的专业基础课程，其中可燃气体燃烧及火焰传播相关知识点的教学存在理论抽象、不够直观等问题。作者将理论学习、实验研究、数值模拟有机结合，基于CFD方法设计了数值模拟仿真实验系统，并以球形容器内甲烷-空气预混燃烧为例，介绍了该系统在燃烧学课程教学中的应用。实践表明，虚拟仿真实验教学能够有效增强学生对相关理论知识的理解，充分调动学生的学习积极性，提升课程的高阶性、创新性和挑战度。
Keyword ：
实验教学 实验教学 数值模拟 数值模拟 燃烧学 燃烧学 理论教学 理论教学 预混燃烧 预混燃烧
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| GB/T 7714 | 张苏 , 魏林慧 , 王金贵 . 甲烷-空气预混燃烧数值模拟仿真实验设计及教学应用 [J]. | 化工高等教育 , 2023 , 40 (03) : 113-119 . |
| MLA | 张苏 et al. "甲烷-空气预混燃烧数值模拟仿真实验设计及教学应用" . | 化工高等教育 40 . 03 (2023) : 113-119 . |
| APA | 张苏 , 魏林慧 , 王金贵 . 甲烷-空气预混燃烧数值模拟仿真实验设计及教学应用 . | 化工高等教育 , 2023 , 40 (03) , 113-119 . |
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为了提升高校实验室的应急反应能力，文章提出在高校实验室群中建立应急快速反应力量，整合原有应急处置队伍，构建基于协同机制的“1+N”两级应急快速反应体系，并进一步提出应急资源的协同机制、响应流程以及高校落实实验室安全保障的措施。研究成果对高校实验室的应急快速反应体系建设具有参考意义。
Keyword ：
协同机制 协同机制 快速反应 快速反应 高校安全 高校安全
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| GB/T 7714 | 王金贵 , 冯泓 . 基于协同机制的实验室应急快速反应体系建设 [J]. | 化工高等教育 , 2023 , 40 (03) : 87-91 . |
| MLA | 王金贵 et al. "基于协同机制的实验室应急快速反应体系建设" . | 化工高等教育 40 . 03 (2023) : 87-91 . |
| APA | 王金贵 , 冯泓 . 基于协同机制的实验室应急快速反应体系建设 . | 化工高等教育 , 2023 , 40 (03) , 87-91 . |
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基于自主搭建的1m3球形爆炸实验系统,通过分析火焰结构与传播过程来探究不同体积分数下的甲烷和氮气对火焰不稳定性的影响及其机制.研究结果表明,甲烷-空气预混气体火焰发展过程与甲烷体积分数直接相关,当甲烷体积分数接近爆炸极限,火焰明显上浮,浮力不稳定性是火焰失稳的主要因素.当甲烷体积分数在 7%～13%范围内时,火焰总体呈规则球形,在热-质扩散因素和流体力学因素相互促进或制约作用下,火焰总体不稳定性呈现先迅速增强后缓慢减弱的趋势.通过改变氮气添加比,发现流体力学不稳定性对氮气添加比的变化更为敏感,当氮气添加比(体积分数)大于 8%时,在流体力学不稳定性因素的主导影响下火焰稳定性迅速增强.
Keyword ：
惰化 惰化 火焰不稳定性 火焰不稳定性 甲烷爆炸 甲烷爆炸 马克斯坦长度 马克斯坦长度
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| GB/T 7714 | 王金贵 , 何伟杰 , 张成名 et al. N2对甲烷-空气预混气体爆炸火焰传播稳定性的影响 [J]. | 福州大学学报（自然科学版） , 2023 , 51 (4) : 582-588 . |
| MLA | 王金贵 et al. "N2对甲烷-空气预混气体爆炸火焰传播稳定性的影响" . | 福州大学学报（自然科学版） 51 . 4 (2023) : 582-588 . |
| APA | 王金贵 , 何伟杰 , 张成名 , 张苏 . N2对甲烷-空气预混气体爆炸火焰传播稳定性的影响 . | 福州大学学报（自然科学版） , 2023 , 51 (4) , 582-588 . |
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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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利用自主设计和搭建的1 m3矩形泄爆系统,开展了顶部点火条件下7％～13％浓度范围的甲烷-空气预混气体泄爆实验,研究甲烷浓度对泄爆过程中火焰演化和内部超压特性的影响规律,并结合压力时程曲线和火焰演化图像等进行机制分析,研究结果表明:浓度对甲烷-空气预混气体的泄爆特性有显著影响,在特定甲烷浓度下,容器内部超压出现双峰现象,在各浓度下均出现压力峰值P1,而压力峰值P2仅在浓度为9％出现.各浓度均出现的第一压力峰值P1 随着浓度的增加呈现先增大后减小的趋势,而该峰值出现时间的变化趋势却与之相反,两者均在甲烷浓度10％下取得极值.这一现象主要由初始火焰传播、外部爆炸、亥姆霍兹振荡和泰勒不稳定性等因素综合影响形成.仅在甲烷浓度9％出现由火焰与声波耦合作用诱发产生的声学峰值P2,该峰值远大于压力峰值P1;其主要由火焰和声压的相互促进与扰动触发热声耦合作用影响形成.火焰向下传播速度随浓度呈先增加后减小的趋势,在甲烷浓度10％时达到最大值,且稍富燃状态下燃烧速度总体较快.
Keyword ：
泄爆 泄爆 火焰演化 火焰演化 甲烷爆炸 甲烷爆炸 顶部点火 顶部点火
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| GB/T 7714 | 陈爱萍 , 胡超 , 梁志星 et al. 顶部点火下甲烷-空气预混泄爆特性研究 [J]. | 爆破 , 2023 , 40 (4) : 218-223 . |
| MLA | 陈爱萍 et al. "顶部点火下甲烷-空气预混泄爆特性研究" . | 爆破 40 . 4 (2023) : 218-223 . |
| APA | 陈爱萍 , 胡超 , 梁志星 , 郑昊宇 , 谢乐 , 高超兰 et al. 顶部点火下甲烷-空气预混泄爆特性研究 . | 爆破 , 2023 , 40 (4) , 218-223 . |
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为提升电网企业应对台风灾害的应急准备能力和决策能力，首先，基于情景构建理论和灾害系统理论，分析近15年42起电网企业应对台风灾害的事故案例，构建电网企业台风灾害“事件-情景-场景-任务-能力”结构化层次模型及其指标体系；其次，依据各指标特征(模糊型、判断型、数值型)匹配相应的相似度计算方法；然后，利用G1法与熵值法在确定主、客观权重基础上得出综合权重，从而计算整体相似度和“预警-响应”2阶段相似度；最后，以某市电网企业应对“莫兰蒂”台风为目标案例进行决策研究。结果表明：构建的“事件-情景-场景-任务-能力”结构化层次模型相比于传统模型可实现分阶段检索，更能满足应急过程中预警和响应阶段的决策需求。
Keyword ：
台风灾害 台风灾害 应急决策 应急决策 情景构建 情景构建 电网企业 电网企业 相似度 相似度
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| GB/T 7714 | 盛伟 , 关城 , 张苏 et al. 基于情景相似的电网企业台风灾害应急决策 [J]. | 中国安全科学学报 , 2023 , 33 (11) : 174-180 . |
| MLA | 盛伟 et al. "基于情景相似的电网企业台风灾害应急决策" . | 中国安全科学学报 33 . 11 (2023) : 174-180 . |
| APA | 盛伟 , 关城 , 张苏 , 傅炜 , 王金贵 . 基于情景相似的电网企业台风灾害应急决策 . | 中国安全科学学报 , 2023 , 33 (11) , 174-180 . |
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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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