Chaopeng Wu

University of Science and Technology of China

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Mingjun Xu

University of Science and Technology of China

Shouxiang Lu

University of Science and Technology of China

ChangHai Li

University of Science and Technology of China

Jiaqing Zhang

State Grid Corporation of China (China)

Shuxin Li

Wuhan University of Technology

Xiao Dong Chen

Soochow University

Haiyan Chen

China Southern Power Grid (China)

Haihui Wang

Tsinghua University

Chen Liu

Institute of Process Engineering

Wenxing Feng

Shenzhen Pingle Orthopedic Hospital

Cooperative Institutions

University of Science and Technology of China

Wuhan University of Technology

Jilin University

Dalian University of Technology

Chinese Academy of Sciences

Shandong University

Chinese Academy of Medical Sciences & Peking Union Medical College

Soochow University

Southern University of Science and Technology

Kunming University of Science and Technology

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Impact Behavior of Single Water Drop Impacting onto Burning Ethanol Surface

Industrial & Engineering Chemistry Research (2017)

Mingjun Xu Jiaqing Zhang Chaopeng Wu ChangHai Li Xiao Chen

A series of experimental and theoretical works are performed to enrich the previous research concerning single water drop impacting on burning ethanol surface. Three typical impact regimes including crater-first-jet, crater-second-jet, and surface bubble are discussed in detail, and an impact regime map is built up. For crater-first-jet and crater-second-jet regimes, the dimensionless maximum crater depth increases with the impact Weber number, but there is a sharp decrease for the regime transitioning from crater-second-jet to surface bubble. In addition, the theoretical maximum crater depth and jet length scales are derived based on energy conservation and conversion. For crater formation, as the drop initial total energy increases, gravity gradually dominates the surface tension effects. For jet formation, however, the surface energy is around nine-times larger than gravitational potential energy when the energy stored in crater is the lowest.

Dimensionless quantity

Drop Impact

10.1021/acs.iecr.7b04008

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Citations (18)

An Investigation of Metallurgical Reactions with Levitated Droplets

Chaopeng Wu

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Regimes during single water droplet impacting on hot ethanol surface

International Journal of Heat and Mass Transfer (2017)

Mingjun Xu Changhai Li Chaopeng Wu Xiao Dong Chen Shouxiang Lu

Dimensionless quantity

Weber number

Penetration (warfare)

10.1016/j.ijheatmasstransfer.2017.09.030

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Citations (26)

Collision dynamics of a single water droplet impinging on a high-temperature pool of oil

Acta Mechanica (2017)

Mingjun Xu Jiaqing Zhang Chaopeng Wu ChangHai Li Xiao Chen

Weber number

Dimensionless quantity

Distilled water

10.1007/s00707-017-2071-5

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Comparative study of toxicity for thermoplastic polyurethane and its flame-retardant composites

Journal of Thermoplastic Composite Materials (2018)

Chen Liu Ruowen Zong Haiyan Chen Junling Wang Chaopeng Wu

Toxic product in fire disasters is the most important reason for fire casualties. With wide application of polymer material, the toxic products in fire effluents are getting more and more diversified and complicated. Polyurethane is one of the most widely used materials. In this article, the fire toxicant release has been evaluated for thermoplastic polyurethane (TPU) and its flame-retardant composites. Ammonium polyphosphate (APP), aluminum hydroxide (ATH), and nano-montmorillonite (MMT) were combined into different flame-retardant combinations at certain ratios. Three kinds of flame-retardant combinations (APP-ATH, APP-MMT, and APP-ATH-MMT) were blended to reduce toxicity of TPU. The properties of thermal stability and decomposition were characterized by thermogravimetric analysis (TGA). TGA/infrared spectrometry, static tube furnace, and steady-state tube furnace were used to evaluate the toxic gases, including CO and HCN. Fractional effective dose (FED) was calculated based on the concentrations of CO, CO 2, and HCN. The results showed that more than 50% toxicity effect in FED was accounted for HCN. The comprehensive toxicity of TPU was reduced in the samples with APP-ATH and APP-ATH-MMT. The yields of CO, CO 2 , and O 2 consumption were indicated much lower in the samples with APP-ATH-MMT than the other two combinations.

Ammonium polyphosphate

Thermogravimetric analysis

Thermoplastic polyurethane

Thermal Stability

Cone calorimeter

10.1177/0892705718798409

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Citations (19)

Above Ground Petroleum Product Storage Tank Fires: A Numerical Analysis of Thermal Radiation for Developing Fire Prevention Strategy

Wenxing Feng Chaopeng Wu Shuxin Li Xiaodong Long Jingjun Xi

Above ground petroleum product storage tanks are tanks or other containers that are above ground, partially buried, bunkered, or in a subterranean vault. These are built to store petroleum product for pipeline system, oilfield and refinery. Tank fires are one of the most terrible accidents in oil pipeline transportation stations. Tank fires pose a significant hazard to people, buildings, process piping, the environment and other facilities as a result of thermal radiation exposure. It is necessary and meaningful to study the distribution of the thermal radiation of a tank fire for emergency response, prevention and reducing loss. To analyze potential tank fire incidents at a pipeline station, a three-dimensional station model was built using a computational fluid dynamics (Abbreviated as CFD, is a branch of fluid mechanics that uses numerical methods and algorithms to solve and analyze problems that involve fluid flows) software package to evaluate the thermal radiation distribution under different conditions. Numerical simulations were carried out for a total of six simulation scenarios to analyze 3 types of potential fires for 2 different liquid products (gasoline and diesel). The three kinds of fires that were modeled included: 1) disk pool fire on top of the tank; 2) ring pool fire on the top of a tank; and 3) pool fire in a dike. The simulation evaluates the effect of the thermal radiation on facilities and people. The simulation results show that the water cooling system is effective at decreasing the magnitude of thermal radiation exposure and as a result is effective at protecting nearby tanks and facilities. Without water protection, the disk fire or ring fire can destroy or damage nearby structures significantly. The results of the simulation also show that the dike pool fire can have a catastrophic consequence to nearby facilities. Further the analysis showed that environmental wind does not change the thermal radiation distribution significantly. The results of the simulation point out countermeasure activities to enhance fire prevention at oil pipeline transportation stations in a scientific way.

Thermal Radiation

Underground storage tank

10.1115/ipc2014-33029

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An Overview of Forest Fire Regimes and Their Constitution Basis

Kaixuan Zhang Haihui Wang Chaopeng Wu Zhenhai Qin Zepeng Wu

Prediction of future fire probability and severity lays the foundation for formulating ecological fire prevention and global environmental protection policies. The present work focuses on overview of the fire regimes and their constitution basis to promote the understanding on the fire regime parameters and the related mechanism operated in the ecosystem. Through the application of remote sensing technology and fire models in fire regime research and predictions, research progress and achievements were made in systematically quantifying the fire characteristic parameters, with the emphasis on the influence of forest stand characteristics on fire regimes under climate change. It has been well understood that the fire regimes have obvious spatiotemporal characteristics from regional to global scale, and the fire regimes are closely related to forest stands and climate. The future fire regimes are likely to be dominated by climate changes. For this reason, the future research on fire regimes needs to further study the spatiotemporal fire process and quantify the parameters of fire regimes through constantly exploring the mechanism of the fire regimes driven by climate changes and the control measures; meanwhile, the research on fire regimes will continue to serve as a basis for forest fire management.

Fire regime

Fire ecology

10.57237/j.jaf.2023.01.003

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