【摘要】 为探究低压含氯化钾(KCl)细水雾抑制庚烷油池火的有效性,基于1. 5 m×1. 5 m×1. 0 m封闭舱室平台,开展不同KCl质量分数(5%、10%、15%、20%)的低压细水雾(0. 2～0. 6 MPa)抑制庚烷油池火焰特性试验,分析不同KCl质量分数、不同喷射压力下庚烷质量损失速率及火焰高度的变化。结果表明:低压纯水细水雾可强化油池火焰燃烧,含KCl添加剂低压细水雾能有效抑制油料火的发展,其中0. 6 MPa压力下20%质量分数KCl溶液灭火效果最好。KCl溶液质量分数的增加,可降低庚烷平均质量损失速率,使火焰高度整体下降;喷嘴压力的升高,同样可降低燃油平均质量损失速率,缩短火焰波动时间,使燃烧提前进入衰减阶段。更多还原

【Abstract】 In order to investigate the effectiveness of low-pressure water mist with KCl in suppressing heptane oil pool fire,based on a 1. 5 m×1. 5 m×1. 0 m enclosed cabin platform,experimental studies were conducted on the flame characteristics of heptane oil pool fire suppressed by low-pressure water mist( 0. 2-0. 6 MPa) with different KCl concentrations( 5%,10%,15%,20%).The changes of heptane mass loss rates and flame heights with different KCl mass fractions and at different injection pressure were analyzed.The results show that although the low-pressure pure water mist can strengthen the flame combustion of oil pool,yet the low-pressure water mist with KCl additive can effectively restrain the development of oil fire,among which the water mist with 20% concentration of KCl solution has the best extinguishing effect under0. 6 MPa pressure. The increase of KCl mass fraction can reduce the average mass loss rate of heptane and lower the overall flame height; similarly,the growth of nozzle pressure can also reduce the fuel oil ’ s average mass loss rate,shorten the fluctuation time of flames,thus advancing combustion into the attenuation stage.更多还原