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Numerical simulation on interaction between superfine powder extinguishing agent and fire plume


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Numerical simulation on interaction between superfine powder extinguishing agent and fire plume
Hua Min123Xu Dayong23Pan Xuhai23Pan Renming1
1.School of Chemical Engineering,NUST,Nanjing 210094,China; 2.Institute of Fire Science and Technology,Nanjing University of Technology,Nanjing 210009,China; 3.Jiangsu Key Laboratory of Urban and Industrial Safety,Nanjing 210009,China
superfine powder extinguishing agents movement characteristics fire plume
In order to research the interaction between superfine powder extinguishing agents(SPEA)and fire plume,the injection and movement characteristics of SPEA particles are numerically simulated in fire at different driving pressures.The interaction process of injection velocity model,discrete phase model,and fire model on the particles release,flow,and fire is numerically simulated.The simulation results indicate that the converging nozzle can enhance the capacity of extinguishing agent particles to penetrate fire plume,and its penetration capacity is directly proportional to the driving pressure value.When the fire interacts with the particles,the height decreases and the width increases.The larger the driving pressure becomes,the shorter the time for particles to enter into fire source area becomes.Particle concentration value in fire source area is relatively higher at 1.2 MPa and smaller at 1.0 MPa.Larger driving pressure can accelerate the motion time of particles to fill the extinguishing room.Eddies,which appear more easily at lower driving pressure,can also drive particles to fill the extinguishing room quickly,but with uneven distribution.


[1] 余明高,廖光煊,张和平,等.哈龙替代产品的研究现状及发展趋势[J].火灾科学,2002,11(2):108-111.
Yu Minggao,Liao Guangxuan,Zhang Heping,et al.Research situation and development tendency of Halon substitutes[J].Fire Safety Science,2002,11(2):108-111.
Zheng Bin,Pan Renming.Discharging and flow ability of superfine powder extinguishing agent[J].Journal of Combustion Science and Technology,2011,17(1):78-83.
Zhou Wenying,Ren Wen'e.Research progress in the cold aerosol fire extinguishing agent[J].Fire Technique and Products Information,2010(11):41-46.
Zhang Wei,Xiao Chunhong,Jing Xiaoyan,et al.The preparation of ammonium phosphate dry chemical fire extinguishing agent[J].Fire Science and Technology,2001,1(94):39-40.
Zhou Xiaomeng,Jiang Lizhen,Chen Tao.Surface characteristics and fire-extinguishing ability of superfine-powder fire-extinguishing agent[J].Journal of Combustion Science and Technology,2009,15(3):214-218.
Yin Zhiping,Pan Renming,Cao Liying.Extinguishing ability of super fine ammonia phosphate extinguishing agent in class B fire[J].Journal of Safety and Environment,2007,7(4):125-128.
Yin Zhiping,Liu Aihua,Pan Renming.Research on evaluation of extinguishing concentration of superfine ammonium phosphate extinguishing agent by laser attenuation measurement[J].Engineering Sciences,2007,9(12):90-95.
[11]Krasnyansky M.Remote extinguishing of large fires with powder aerosols[J].Fire and Materials,2006,30(5):371-382.
[12]Krasnyansky M.Studies of fundamental physical-chemical mechanisms and process of flame extinguishing by powder aerosols[J].Fire and Materials,2008,32(1):27-47.
Hua Min,Yin Zhiping,Pan Renming.Research on movement characteristic of superfine fire extinguishing powder released in non-fire room[J].China Safety Science Journal,2011,21(9):46-52.
Wang Daqing,Wei Haiyan.Analytical research on leakage source model of pressure vessel[J].Petroleum Engineering Construction,2010,5(36):17-18.


Last Update: 2014-02-28