Query：
学者姓名：黄萍
Refining：
Year
Type
Indexed by
Source
Complex
Co-
Language
Clean All
Abstract ：
CFD simulation tests were carried out to study the asymmetric flow phenomenon caused by the combination effect of tunnel slope and longitudinal fire location in a naturally ventilated tunnel. The result shows that the tunnel slope and the longitudinal fire location can both create the induced longitudinal flow solely. The longitudinal flow within tunnel induced by the stack effect caused by the tunnel slope is normally unidirectional, flowing uphill and the speed increases gradually with the tunnel slope. While the longitudinal flow induced by the thermal pressure difference caused by the uneven distribution of upstream and downstream smoke transportation can be bidirectional, which depends on the longitudinal fire location (also known as the downstream and upstream tunnel length difference, Delta L = L-down - L-up). Therefore, the induced longitudinal flow under the combination effect of tunnel slope and longitudinal fire location is very complex. For tunnels going uphill from left (upstream) to the right (downstream) portals, the two effects are positively added when the fire is located at the upstream tunnel (Delta L > 0), while the two effects are counteracted when the fire is located at the downstream (Delta L < 0). To quantify the strength of asymmetric flow caused by the two effects, an empirical equation of mass flow rate of induced longitudinal flow is proposed. Meanwhile, a model to predict the smoke back-layering length under the two effects is also proposed and validated by former experimental data. A prediction model on the upper critical fire position where the two effects are completely canceled out is proposed. Another critical position (the lower critical fire position) where the smoke flow can achieve unidirectional transportation in an inclined tunnel under natural ventilation conditions is deduced as well.
Keyword ：
Asymmetric flow effect Asymmetric flow effect Back-layering length Back-layering length Inclined tunnel Inclined tunnel Longitudinal fire location Longitudinal fire location Mass flow rate Mass flow rate
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Yu, Longxing , Lei, Xiwen , Huang, Ping et al. Study on the combination effect of tunnel slope and longitudinal fire location on the asymmetric flow fields in a naturally ventilated tunnel [J]. | TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY , 2024 , 146 . |
| MLA | Yu, Longxing et al. "Study on the combination effect of tunnel slope and longitudinal fire location on the asymmetric flow fields in a naturally ventilated tunnel" . | TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY 146 (2024) . |
| APA | Yu, Longxing , Lei, Xiwen , Huang, Ping , Liu, Chunxiang , Zhang, Hao , Yang, Fuqiang . Study on the combination effect of tunnel slope and longitudinal fire location on the asymmetric flow fields in a naturally ventilated tunnel . | TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY , 2024 , 146 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
为了更有效地防控综合管廊电缆桥架火灾，在全尺寸综合管廊中开展了电缆桥架火灾试验，系统研究了电缆层数和卷吸条件对电缆桥架火灾烟气温度分布的影响。在电缆桥架附近垂直和水平布置一系列热电偶，分别用于测量管廊内垂直和顶棚水平温度分布。基于管廊内的垂直温度分布，揭示了火灾场景下管廊垂直温度分层规律。结果表明，管廊内发生电缆桥架火灾时，管廊内从上往下可以分为三部分：顶部射流层、中间热烟气过渡层和下部冷空气层。通过分析管廊不同端口的顶棚横向温度分布，发现顶棚温度在半封闭端的衰减速度比全封闭端更快，建立了考虑热释放速率和火源距离顶棚距离的全封闭端顶棚下方无量纲纵向温度分布模型。最后根据卷吸条件与顶棚最大温升的对应关系，发现整体火源功率越大的电缆桥架火灾受到侧壁和端壁的热反馈影响越强烈，针对不同卷吸条件下的电缆桥架火灾分别建立了顶棚最大温升预测模型。通过将模型预测值与试验值对比，发现模型误差在16%以内。
Keyword ：
卷吸受限 卷吸受限 安全工程 安全工程 烟气温度分布 烟气温度分布 电缆桥架火灾 电缆桥架火灾 综合管廊 综合管廊
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | 黄萍 , 林煦东 , 刘春祥 et al. 不同受限条件下综合管廊电缆桥架火灾烟气温度分布特性研究 [J]. | 安全与环境学报 , 2024 , 24 (03) : 897-906 . |
| MLA | 黄萍 et al. "不同受限条件下综合管廊电缆桥架火灾烟气温度分布特性研究" . | 安全与环境学报 24 . 03 (2024) : 897-906 . |
| APA | 黄萍 , 林煦东 , 刘春祥 , 曾凡捷 , 林开虹 , 杨明理 et al. 不同受限条件下综合管廊电缆桥架火灾烟气温度分布特性研究 . | 安全与环境学报 , 2024 , 24 (03) , 897-906 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
Annular pool fires, frequently happened in chemical industries, have a significant influence on environmental pollution. Air pollution, greenhouse gas emissions, water pollution, and soil contamination are general ways of environmental hazards caused by the annular pool fires. This study built upon our previous study (Environ. Sci. Pollut. Res., 2023, 30(21): 59781-59792.), and extended to investigate the combustion and fire plume flow behaviors of annular pool fires, both with and without air entrainment through the hollow center of the annular pool. Results show that when there is no air entrainment through the hollow center, the low combustion intensity area at the plume's central axis gradually extends while the high combustion intensity area concentrates at higher places and the flame height increased by nearly 40% from a solid pool (Din/Dout = 0) to the annular pool (Din/Dout = 0.80). Additionally, the area with high combustion intensity is more concentrated at a higher position. The combustion of annular pool fires was found to be dominated by non-premixed diffusion combustion. The center of the annular pool fires is dominated by air prior to flame merging and by fuel vapor after the merging occurs. For annular pool fires with air entrainment through the center of the pool, the combustion intensity increases as Din/Dout at the plume base increases. And, the flame height decreased by nearly 25% as Din/Dout increases. Flame burning occurs both on the outside and inside of the plume, exhibiting a "double layer" combustion characteristic. It reveals that the combustion of the fire plume transitions to premixed diffusion combustion. The center of the annular pool fire is predominantly composed of air. Understanding and controlling annular pool fires can lead to new methods for remediating fuel spills, reducing pollution from combustion, and advancing research in fluid mechanics.
Keyword ：
Air entrainment Air entrainment Annular pool fire Annular pool fire Combustion mode Combustion mode Numerical simulation Numerical simulation Plume flow Plume flow
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Huang, Ping , Zhang, Rui , Liu, Chunxiang et al. Burning and plume flow behaviors of annular pool fires: with and without air entrainment through the pool center [J]. | ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH , 2024 , 31 (5) : 8012-8025 . |
| MLA | Huang, Ping et al. "Burning and plume flow behaviors of annular pool fires: with and without air entrainment through the pool center" . | ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH 31 . 5 (2024) : 8012-8025 . |
| APA | Huang, Ping , Zhang, Rui , Liu, Chunxiang , Wu, Xinyue , Chen, Dimin , Chen, Shanshan et al. Burning and plume flow behaviors of annular pool fires: with and without air entrainment through the pool center . | ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH , 2024 , 31 (5) , 8012-8025 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
After a fire occurs, it is imperative that people in danger evacuate as soon as possible. However, the current emergency plan based on the pre-established static exiting route is unable to considering the real-time fire scenario. In addition, the selection of evacuation routes significantly relies on the decision-maker's experiences. These issues seriously affect evacuation efficiency, decreasing the likelihood of survival. This paper developed an effective real-time evacuation guidance method that can automatically select the evacuation route in accordance with real-time fire scenarios. The model is established based on the on-policy learning algorithm SARSA (State-action-reward-state-action), an algorithm for learning a Markov decision process policy, which could mimic the decision-making of pedestrian behaviors in an emergency. In addition, two types of radar (exit radar and fire radar) are introduced into the SARSA algorithm to facilitate the wayfinding process, which formulated the so-called Radar-assisted SARSA (RSARSA). The results have shown that RSARSA can swiftly decide a safer evacuation route for pedestrians or crowd at arbitrary location. The convergence time of initial successful route planning is between 0.05 and 4.5 s under the tests in this paper. The evacuation route determined by this algorithm can well consider the fire, and timely avoid routes with potential dangerous. Moreover, RSARSA can flexibly respond to different fires under various heat release rates and development speeds. By applying this technology, fire evacuation can be guided by routes that are more attuned to the mindset of pedestrians. It can provide a good basis for route selection of crowd evacuation.
Keyword ：
Evacuation Evacuation Fire emergency Fire emergency On -policy Learning On -policy Learning Reinforcement learning Reinforcement learning Route decision Route decision
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Huang, Ping , Lin, Xiajun , Liu, Chunxiang et al. A real-time automatic fire emergency evacuation route selection model based on decision-making processes of pedestrians [J]. | SAFETY SCIENCE , 2024 , 169 . |
| MLA | Huang, Ping et al. "A real-time automatic fire emergency evacuation route selection model based on decision-making processes of pedestrians" . | SAFETY SCIENCE 169 (2024) . |
| APA | Huang, Ping , Lin, Xiajun , Liu, Chunxiang , Fu, Libi , Yu, Longxing . A real-time automatic fire emergency evacuation route selection model based on decision-making processes of pedestrians . | SAFETY SCIENCE , 2024 , 169 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
为解决重大疫情多疫区交互影响风险下的物资调度问题,首先基于系统动力学建立重大传染病疫情动态演变模型,并以2020 年某市疫情为实例,运用配对样本 t检验方法比对真实数据与预测数据,验证模型的有效性;然后考虑地缘关联,建立多疫区交互影响的疫情动态演变模型,根据现有疫情数据预测未来在诊治疗人口数量,进而实时预测防疫物资动态需求量;最后将预测物资量作为疫区实时需求量,以调度时间最短、优先疫区高需求紧迫度为目标,构建多疫区防疫物资动态调度模型,并设计遗传算法求解.研究结果表明:构建的多疫区防疫物资动态调度模型可准确刻画多疫区复杂交互关系,进而动态预测防疫物资需求量,研究结果可有效解决存在交互关系的多疫区实时物资动态调度问题.
Keyword ：
多疫区交互影响 多疫区交互影响 物资动态调度 物资动态调度 系统动力学 系统动力学 遗传算法 遗传算法 需求紧迫度 需求紧迫度
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | 段在鹏 , 王照阳 , 俞思雅 et al. 多疫区复杂交互影响下的防疫物资动态调度研究 [J]. | 中国安全生产科学技术 , 2023 , 19 (6) : 40-47 . |
| MLA | 段在鹏 et al. "多疫区复杂交互影响下的防疫物资动态调度研究" . | 中国安全生产科学技术 19 . 6 (2023) : 40-47 . |
| APA | 段在鹏 , 王照阳 , 俞思雅 , 黄萍 . 多疫区复杂交互影响下的防疫物资动态调度研究 . | 中国安全生产科学技术 , 2023 , 19 (6) , 40-47 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
如何高效学习?如何培养学生的学习兴趣?这些都是当前各高校教学改革过程中面临的巨大难题。为了满足燃烧学、流体力学与数值模拟等实验教学的需要，按照弗洛德相似准则，设计搭建了1∶10缩尺寸多功能隧道火灾实验平台。该实验平台能够模拟隧道中小汽车着火的过程，有助于教师直观地解释燃烧学课程中火灾动力学的抽象原理，说明流体力学课程中相似性原理的应用，并在数值模拟课程教学中为数值模拟结果提供实验验证数据，进而说明模拟和实验的可靠性。该实验平台还可通过调节隧道坡度，研究隧道坡度对烟气流动的影响，为隧道安全研究提供重要的理论基础和数据支撑。
Keyword ：
实验平台 实验平台 实验教学 实验教学 教学案例 教学案例 数值模拟 数值模拟 隧道火灾 隧道火灾
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | 黄萍 , 朱宏儒 , 叶圣琳 et al. 隧道火灾模拟与实验在安全工程专业课程教学中的联合应用 [J]. | 化工高等教育 , 2023 , 40 (03) : 106-112 . |
| MLA | 黄萍 et al. "隧道火灾模拟与实验在安全工程专业课程教学中的联合应用" . | 化工高等教育 40 . 03 (2023) : 106-112 . |
| APA | 黄萍 , 朱宏儒 , 叶圣琳 , 陈寅楠 , 余龙星 . 隧道火灾模拟与实验在安全工程专业课程教学中的联合应用 . | 化工高等教育 , 2023 , 40 (03) , 106-112 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
Annular fire source is a common combustion form in fire accidents. Effects of D-in/D-out (the ratio of inner to outer diameters of the floating-roof tank) on the flame morphology and plume entrainment mechanisms of annular pool fires were studied by numerical simulation. Results show, as D-in/D-out increases, the area with low combustion intensity near the central axis of the pool surface gradually increases. Combined with the time-series HRR and the stoichiometric mixture fraction line of the fire plume, it reveals that the combustion of annular pool fire is dominated by non-premixed diffusion flame. The pressure near the pool outlet decreases with D-in/D-out, while the plume turbulence presents an opposite trend. Based on the time-sequential plume flow and the gas-phase material distribution data, the flame merging mechanism of the annular pool fires is revealed. Furthermore, based on the similarity criterion, it verifies that the applicability of the above scaled simulation conclusions could also be extended to guide full-scale fires.
Keyword ：
Annular pool fire Annular pool fire Flame merging Flame merging Full-scale simulation Full-scale simulation Non-premixed combustion Non-premixed combustion Numerical simulation Numerical simulation Plume flow Plume flow
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Huang, Ping , Zhang, Rui , Yu, Longxing et al. Study on the combustion, entrainment, and plume flow behaviors of annular pool fires [J]. | ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH , 2023 , 30 (21) : 59781-59792 . |
| MLA | Huang, Ping et al. "Study on the combustion, entrainment, and plume flow behaviors of annular pool fires" . | ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH 30 . 21 (2023) : 59781-59792 . |
| APA | Huang, Ping , Zhang, Rui , Yu, Longxing , Liu, Chunxiang . Study on the combustion, entrainment, and plume flow behaviors of annular pool fires . | ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH , 2023 , 30 (21) , 59781-59792 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
根据燃烧学、化工安全课程的教学实验需要，设计开发了不同边缘高度油池火传热和烟气分析教学实验平台。该平台主要由可变边缘高度燃烧系统、多元化传热测量系统及三段一体式烟气测量系统三部分组成。该平台能够模拟现实油池内由燃料被逐渐消耗所导致的油池边缘高度（燃料液面与油池上边缘的距离）不断增加的燃烧行为，同时还能获取燃料消耗速率、热反馈与燃烧产物等表征燃烧特性的数据。通过该实验平台，学生可以了解边缘高度影响下油池火产烟特性和热反馈机制，加深对油池火灾燃烧机理的认识，提高动手实践能力和创新能力。
Keyword ：
教学实验平台 教学实验平台 油池火 油池火 烟气分析 烟气分析 热反馈 热反馈 边缘高度 边缘高度
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | 刘春祥 , 刘声涛 , 余龙星 et al. 不同边缘高度油池火传热和烟气分析教学实验平台 [J]. | 实验技术与管理 , 2023 , 40 (03) : 179-184 . |
| MLA | 刘春祥 et al. "不同边缘高度油池火传热和烟气分析教学实验平台" . | 实验技术与管理 40 . 03 (2023) : 179-184 . |
| APA | 刘春祥 , 刘声涛 , 余龙星 , 黄萍 , 黄俊清 , 张钰 et al. 不同边缘高度油池火传热和烟气分析教学实验平台 . | 实验技术与管理 , 2023 , 40 (03) , 179-184 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
In this paper, the morphology of turbulent diffusion flames with varying aspect ratios under slope conditions was investigated. A simulated fire source using propane gas with an area of 80 cm2 was utilized. The influences of slope angle and aspect ratio of the fire source on the flame tilt angle (between the plume centerline and the slope), flame length, and flame height were systematically studied. The aspect ratio of the fire source (L/W) was changed from 1 to 8, and the slope angle was changed from 0 degrees to 40 degrees. Results indicate that the presence of a slope causes asymmetrical air entrainment on both sides of the fire plume, causing a pressure difference that leads to a decrease in the flame tilt angle as the slope angle increases. Additionally, the flame length increases monotonically with the slope angle due to the enhanced component of thermal buoyancy along the slope. Under the same slope condition, the flame tilt angle and flame height (perpendicular to the slope) decrease as the aspect ratio increases. This phenomenon is attributed to the increased entrainment restriction effect of the slope on the fire plume. New models for calculating flame tilt angle, flame length, and flame height, which consider the slope angle and aspect ratio of the fire source were established by using the equivalent perimeter of plume entrainment. To further verify the reliability of the newly established models, reference data with wide heat release rate (6.15 kW-231 kW), different slope inclination angle (0 degrees -80 degrees), pool size (equivalent diameter: 9 cm-44.1 cm), and different fuels (propane, ethylene) were used to against with the predicted values of our correlations. It is found that the maximum error of all correlations is within 15-20%, their universality and accuracy are further verified.
Keyword ：
Aspect ratio Aspect ratio Flame height Flame height Flame length Flame length Flame tilt angle Flame tilt angle Slope Slope Turbulent flame Turbulent flame
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Liu, Chunxiang , Lai, Tairun , Zhang, Hao et al. Experimental study on the morphology of turbulent diffusion flames with different aspect ratios under slope conditions [J]. | FUEL , 2023 , 357 . |
| MLA | Liu, Chunxiang et al. "Experimental study on the morphology of turbulent diffusion flames with different aspect ratios under slope conditions" . | FUEL 357 (2023) . |
| APA | Liu, Chunxiang , Lai, Tairun , Zhang, Hao , Huang, Ping , Lin, Kaihong , Lin, Yuchao et al. Experimental study on the morphology of turbulent diffusion flames with different aspect ratios under slope conditions . | FUEL , 2023 , 357 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Abstract ：
Ullage height (the distance between the fuel surface and the pool upper rim) is one of the most important and widely recognized factors that affect the burning rate and heat transfer of pool fires. This study investigated the effects of ullage height on the burning rate, heat feedback, and radiation fraction of medium-scale pool fires. Heptane pool fires were tested with a diameter (D) of 30 cm and the non-dimensional ullage height (h/D, h is the ullage height) being varied from 0 to 1.48. Results show that the non-dimensional burning rate tends to decrease exponentially with h/D. It has been proved that the current models used to predict the burning rate of pool fires are not applicable to those medium-scale pool fires that are affected by the ullage height. The radiative, conductive, and convective heat feedback rate overall decrease with the ullage height. The conductive heat feedback fraction weakly depends on h/D. The radiative heat feedback fraction firstly decreases then stabilizes with h/D, while the convective heat feedback fraction shows an opposite trend. The radiative fractions firstly increase then decrease with h/D. This paper presents a new correlation with considering the ullage height and the mean beam length within the pool ullage. The universality and accuracy of the proposed model were verified by comparing it with extensive experimental data, where D varied from 10 cm to 35 cm, and h/D varied from 0 to 2.0.
Keyword ：
Burning rate Burning rate Heat transfer Heat transfer Mean beam length Mean beam length Medium-scale pool fire Medium-scale pool fire Ullage height Ullage height
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Liu, Chunxiang , Yin, Zhongyu , Zhang, Hao et al. Experimental study of ullage height on the burning rate and heat transfer of medium-scale heptane pool fires [J]. | INTERNATIONAL JOURNAL OF THERMAL SCIENCES , 2023 , 197 . |
| MLA | Liu, Chunxiang et al. "Experimental study of ullage height on the burning rate and heat transfer of medium-scale heptane pool fires" . | INTERNATIONAL JOURNAL OF THERMAL SCIENCES 197 (2023) . |
| APA | Liu, Chunxiang , Yin, Zhongyu , Zhang, Hao , Huang, Ping , Yang, Fuqiang , Zeng, Fanjie et al. Experimental study of ullage height on the burning rate and heat transfer of medium-scale heptane pool fires . | INTERNATIONAL JOURNAL OF THERMAL SCIENCES , 2023 , 197 . |
| Export to | NoteExpress RIS BibTex |
Version ：
Export
| Results： |
Selected to |
| Format： |
