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| 1 | Simulation of evacuation behaviors in fire using spacial grid显示文摘A two-dimensional Cellular Automata (CA) model to demonstrate the special phenomena of occupants evacuating from fire room is presented. A set of simple but effective models is proposed to investigate the effect of fire smoke on route choice. The concept of danger grade is introduced, and occupants select the target cell according to the value of danger grade at each time step. Some technique is introduced to substitute the human intelligence, such as premeditation. The simulation results show that human evacuation is influenced greatly by both human visual field and building exit. | YANGLizhong ZHAODaoliang LIJia FANGWeifeng FANWeicheng | 2004 | Progress in Natural Science:Materials International2004，14，7： | 12 |
| 2 | A kinetic modeling study of pollutant formation in premixed hydrocarbon flames显示文摘A kinetic modeling of pollutant formation in hydrocarbon flames is presented through analysis of hierar- chical structures. Based on the newly released GRI-Mech 3.0, it was mainly taken from Dean and Bozzelli (DB) and Wang mechanism respectively for the nitrogen chemistry, the for- mation and growth of polycyclic aromatic hydrocarbons (PAH). The modeling was improved by considering C4 and Howard’s PAH chemistry. The mechanism consists of 121 species in 731 reactions. Two premixed flame structures are predicted, and the computed results are compared with the experimental ones. It is shown that the mechanism predicts reasonably well the concentration profiles of major, key in- termediate and minor species. | JIANGYong QIURong FANWeicheng | 2005 | Chinese Science Bulletin2005，50，3： | 6 |
| 3 | A multi-layer zone model for predicting temperature distribution in a fire room显示文摘A multi-layer zone fire growth model is developed to predict the vertical distributions of the temperature in a single room. The fire room volume is divided into a number of horizontal layers,in which the temperature and other physical properties are assumed to be uniform. The principal equations for each laminated horizontal layer are derived from the conservation equations of mass and energy. The implemented fire sub-models are introduced, including the combustion,fluid flow and heat transfer models. Combined with these sub-models,the zone equations for the gas temperature of each layer are solved by Runge-Kutta method for each time step. The results of the sample calculations compare well with the results of experiments conducted by Steckler et al. | CHENXiaojun YANGLizhong DENGZhihua FANWeicheng | 2004 | Progress in Natural Science:Materials International2004，14，6： | 6 |
| 4 | Conditional moment closure modeling of a lifted turbulent flame显示文摘Results obtained using conditional moment closure (CMC) approach to modeling a lifted turbulent hy-drogen flame are presented. Predictions are based on k-ε-g turbulent closure, a 23-step chemical mechanism and a ra-dially averaged CMC model. The objectives are to find out how radially averaged CMC can represent a lifted flame and which mechanism of flame stabilization can be described by this modeling method. As a first stage of the study of multi-dimensional CMC for large eddy simulation (LES) of the lifted turbulent flames, the effect of turbulence upon combustion is included, the high-order compact finite- difference scheme (Padé) is used and previously developed characteristic-wave-based boundary conditions for multi- component perfect gas mixtures are here extended to their conditional forms but the heat release due to combustion is not part of the turbulent calculations. Attention is focused to the lift-off region of the flame which is commonly considered as a cold flow. Comparison with published experimental data and the computational results shows that the lift-off height can be accurately determined, and Favre averaged radial profiles of temperature and species mole fractions are also reasonably well predicted. Some of the current flame stabili-zation mechanisms are discussed. | JIANGYong QIURong ZHOUWei FANWeicheng | 2005 | Chinese Science Bulletin2005，50，12： | 4 |
| 5 | Numerical Simulation of Microgravity Flame Spread Over Solid Combustibles显示文摘Numerical Simulation of Microgravity Flame Spread Over Solid CombustiblesNumericalSimulationofMicrogravityFlameSpreadOverSoli... | JIANGXi FANWeicheng | 1995 | Journal of Thermal Science1995，4，2： | 2 |
| 6 | Establishment of a new dynamic RRC model in smoke toxicity evaluation and engineering application显示文摘It is by now a well established fact that the overwhelming hazard from fire is smoke as far as the death of people in the fire is concerned.There are many methodologies for addressing the smoke toxicity component of fire hazard such as CO stochastic model,FED(fractional effective dose)model,FEC(fractional effective concentration)model,N-gas model and so on.None of these models can reflect spatio-temporal variation of the smoke concentration.A new dynamic smoke toxicity evaluation model,RRC(respiration,route and concentration)model,is proposed in this paper concerning the three decisive factors in real fire such as the respiration,movement route of people and the distribution of smoke concentration in the building.Furthermore,an example of the model is presented. | YANGLizhong FANGTingyong ZHOUXiaodong FENGWenxing HUANGRui ZHAIGuanglong FANWeicheng | 2005 | Progress in Natural Science:Materials International2005，15，3： | 2 |
| 7 | Numerical simulations of buoyant reactive jets with sidewall effects显示文摘The near field dynamics of buoyant reactive jets with adjacent sidewalls is investigated by time-dependent three-dimensional direct simulations. The physical problem is a fuel jet issuing vertically into an oxidant ambient envi- ronment in a corner configuration with sidewall boundaries. Simulation results are presented for two cases with different jet nozzle geometries: a corner-round reactive jet and a cor- ner-square reactive jet with the same cross-sectional area on the nozzle plane. Buoyancy-induced large vortical structures evolve spatially in the flow field and transition to turbulence occurs downstream. Calculation of the mean flow properties shows that entrainment of the corner-round jet is stronger than that of the corner-square jet due to the stronger vortex deformation in the corner-round case. | ZHANGHeping JIANGXi WANGWei YANGYun XULiang FANWeicheng | 2004 | Chinese Science Bulletin2004，49，19： | 2 |
| 8 | Theory and Numerical Study on Three Dimensional Discrete Transfer Radiation Model显示文摘TheoryandNumericalStudyonThreeDimensionalDiscreteTransferRadiationModel￥YaoJianda;FanWeicheng(StateKeyLabofFireScience,Univer... | YaoJianda FanWeicheng | 1994 | Journal of Thermal Science1994，3，4： | 1 |
| 9 | Numerical Simulation of Multistory Building Fire with Zone-Modeling Method显示文摘NumericalSimulationofMultistoryBuildingFirewithZone-ModelingMethodFuZhuman;FanWeicheng(StateKeyLabofFireScience,UniversityofS... | FuZhuman FanWeicheng | 1996 | Journal of Thermal Science1996，5，2： | 0 |
| 10 | Simulation of a compartment fire using a zone model显示文摘This paper presents the zone modeling analysis of a single compartment flashover fire. Two criteria are ap- plied in the model to judge the onset of ignition for different combustibles. By calculating the total received energy through radiation or the surface temperature of the combus- tible, the fire growth can be quantitatively determined. The improved zone fire model shows the influence of different combustibles upon the fire growth. This model is better than the traditional zone model because the common criteria of flashover, i.e. an upper layer temperature of 600℃ and the heat radiation intensity received by the floor of 20 kW/m2, have not been applied in it. | YANGLizhong GUOZaifu JIJingwei FANWeicheng | 2005 | Chinese Science Bulletin2005，50，9： | 0 |
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