A5063421610- Fire dynamics and safety research
- Combustion and Detonation Processes
- Flame retardant materials and properties
- Thermal and Kinetic Analysis
- Combustion and flame dynamics
- Fire effects on ecosystems
- Evacuation and Crowd Dynamics
- Fire Detection and Safety Systems
- Risk and Safety Analysis
- High voltage insulation and dielectric phenomena
- Vibration and Dynamic Analysis
- Smart Grid and Power Systems
- Power Transformer Diagnostics and Insulation
- Aerosol Filtration and Electrostatic Precipitation
- Lightning and Electromagnetic Phenomena
- Energetic Materials and Combustion
- Wind and Air Flow Studies
- Polymer Nanocomposites and Properties
- Petroleum Processing and Analysis
- Rheology and Fluid Dynamics Studies
- Evaluation and Optimization Models
- Polymer Science and PVC
- Computational Fluid Dynamics and Aerodynamics
- Polymer crystallization and properties
- Multi-Criteria Decision Making
University of Science and Technology of China
2017-2022
For the interchange tunnel fire, structural features of bifurcation and convergence will make smoke movement characteristics different from traditional single tube fire. This paper carried out numerical simulations by ANSYS Fluent to study in large scale Different heat release rates, ventilation velocities angles were considered analyze carbon monoxide concentration distribution critical velocity. Results showed that CO decreased as velocity increased variation gradient distance away fire...
The melting behavior of the noise reduction board (Box-in) in converter substation were investigated experimentally. temperature curves, infrared image temperature, radiation heat flow curves experiment obtained, and falling two types boards as well fire extinguishing process discussed. experimental result showed that both would melt fall when they heated by fire. Box-in could provide favorable conditions for fire-fighting operation outside Box-in. In this study, hot transformer oil pool was...
In order to evaluate the effect of nozzle explosion damage on performance water spray fire protection system ultra-high voltage (UHV) transformer, experiments were conducted with 0%, 10%, 30%, 50% falling simulate system. The effects failure different ratios nozzles mist envelope effect, pressure and pipeline flow rate UHV transformers analyzed. results showed that significantly affected by proportion nozzles. When exceeded working most fell below minimum specified standard. range sprinklers...
The cold spray test of water fire extinguishing system, compressed air foam cannon system and combined were carried out based on a scaled platform. results show that most the will be directly incorporated into foam, defoaming effect is limited. shows can achieve effective under different sequence conditions, two systems used simultaneously in dealing with transformer oil fire. comprehensive cooling dual better than single system. Combining actual characteristics requirements converter...
In this paper, failure mode and effect analysis (FMEA) based on bayesian method is used to identify the modes of fixed compressed air foam system(CAFS) key components in ultra-high voltage(UHV) converter station. Firstly, CAFS are analyzed, risk priority number (RPN) introduced quantify possibility severity failure. For calculation fault occurrence frequency (O) RPN, Bayesian estimation for quantitative calculation. calculation, first convert fuse multiple prior information, then test...
Numerical simulation of long-distance pipeline transportation compressed air foam system (CAFS) was carried out by Fluent software. According to the real scene in converter station, a numerical model transmission network is established simulate different pipe diameters and flow conditions. The viscosity variation (CAF) during influence conditions on response time were analyzed. Through simulation, at inlet large high middle low both sides. rate elbow decreases, resulting decrease local...
The method of the full-size experiment is used to study conveying characteristics compressed air foam in pipe. This paper proposes a calculation flow rate, pipe resistance loss, and like. longer pipeline is, more stable foam, 25% drainage time foam. response system was obtained by analysis experimental results. It found that speed faster, but tube network cannon have for rated working pressure. pipeline, rate range experimentally, pressure loss along way, local loss. According results...
High-voltage switch cabinet, an equipment for the power distribution and line protection, is widely used in system. Once a fire happens high-voltage grid maintainers would suffer considerable damage. Therefore, this paper numerically examined flame spread smoke movement cabinet. The effect of ignition position on was investigated. temperature field, heat release rate, were analyzed. results showed that insulator primarily burnt single being ignited while longer time needed three insulators...
This paper compared and analyzed the current standards for fireproof sealing of valve hall in UHV converter station. It was found that explosion effect not taken into account design according to specifications. At same time, existing fire resistance test based on standard temperature rise curve (wood stack fire), which cannot deal with hot oil accompanied by high transformer. Two modes prevention failure were proposed. On this basis, an improved scheme including anti-explosion door plugging...
Foam extinguishing agents are widely used in large transformer fire systems. A stability experiment platform based on the law of connected vessel was built to investigate influence oil temperature foam agents. The drainage properties aqueous film forming (AFF-F), fluorinated-protein (FP-F), and synthetic (S-F) KI25X at various temperatures were obtained. percentage rate with investigated, behavior three kinds compared. resuts showed that first increased then decreased increase surface a...
As an important structure connecting rooms and atrium in large shopping malls, corridors have a huge impact on smoke movement but are rarely mentioned previous studies. The purpose of this study is to investigate the changes corridor's physical boundary (corridor width keep stand height) development fire within typical room-corridor-atrium model. A series cases were carried out numerically by using Fire Dynamic Simulator (FDS).The result shows that: height has effect migration path,...