Experimental study on ship fire smoke control in large flat-space
To effectively control the smoke spread in large flat-space ships,the oil pool mass loss rate,chamber temperature distribution,thermal insulation efficiency,and smoke control effect were investigated during large-scale fires.The experimental study was performed under three different smoke screen heights(0.35,0.55,and 0.70 m)and mechanical ventilation conditions in a chamber with dimensions of 30 m×24 m×2.3 m.The results indicated that the increase in smoke screen height caused a decrease in the peak value of the oil pool mass loss.The smoke screen height had a more significant impact on the smoke temperature in the chamber's upper layer than that of the lower layer.The peak temperature above 1.4 m was significantly decreased,whereas no significant change in the peak temperature below 1.4 m was observed.The average ceiling temperature and thermal insulation efficiency decreased with the increase in the smoke screen height.The thermal insulation efficiency increased from 28.2%to 50.8%under the combined smoke control mode,and it increased from 29.4%to 54.7%under the independent smoke control mode.
large flat-spaceship firesmoke controlsmoke screenmechanical ventilationsmoke control modethermal insulation efficiency
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