|Table of Contents|

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

《南京理工大学学报》(自然科学版)[ISSN:1005-9830/CN:32-1397/N]

Issue:
2014年01期
Page:
154-160
Research Field:
Publishing date:

Info

Title:
Numerical simulation on interaction between superfine powder extinguishing agent and fire plume
Author(s):
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
Keywords:
superfine powder extinguishing agents movement characteristics fire plume
PACS:
X932
DOI:
-
Abstract:
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.

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Last Update: 2014-02-28