科研之友
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摘要
In order to investigate the flowing ability of superfine powder extinguishing agent, particle concentration distribution was tested by a laser measuring system designed by the authors in a 10 m3 closed room. The average particle size of the extinguishing agent is about 6 μm. A new discharge device of extinguishing agent was designed according to bursting principle and employed in experiment. The experimental results indicated that extinguishing agent powder could be quickly dispersed after discharge. However, the concentration was not evenly distributed. Particle concentration was relatively high in the bursting direction but low in the corner of room. Bursting effect disappeared about 0.35 s later after discharging. Then, particles of extinguishing agent diffused freely. The concentration of extinguishing agent remained relatively high in the local space. It was found that both energy releasing power of gas-generating agent and particle size of extinguishing agent had a great effect on dispersion of extinguishing agent. The more of energy releasing power and the less of size of extinguishing agent, the more quickly the extinguishing agent dispersed and the more uniform extinguishing agent particle distribution is in the limited space. Superfine powder fire-extinguishing agent has the potential for fire protection under total flooding conditions.
