摘要
建立了单室火灾区域模型 ,模型中考虑了火焰与喷淋水之间的相互作用 .定义了一个称为有效喷淋系数的参数 ,其物理意义为喷淋面积与着火面积的有效比 .对有效喷淋系数和喷淋水流率对灭火效果的影响进行了研究 .通过数值模拟得到了以下结果 :对一定条件下的火灾进行喷淋灭火时 ,分别存在一个临界流量和最大流量 .为了灭火 ,喷淋水流率必须大于临界流量 .但用太大的喷淋水量 ,并不提高灭火效果 ,由于喷淋水过量 ,增加了灭火的运行成本 .在给出条件下 ,临界流量和最大流量分别为 0 .0 5 2 4kg/s和 0 .2kg/s .
Single room fire zone model is built. The fire in which the suppressing effect of water sprays is taken into account is simulated. A new spray parameter is defined as effective spray coefficient, which physically stands for the effective ratios between spray area and fire area. The effects of effective spray coefficient and water spray flow rate on fire suppression mechanism are investigated. The simulations show that there are both a critical and a maximum value of water flow rates for a certain fire. To suppress a certain fire, the water spray flow rate must be more than a certain critical value. However, using too high water spray flow rate does not increase fire suppression efficiency but only leads to increased operational cost because of the excess water flow rate. These values are 0.0524 kg/s and 0.2 kg/s respectively.
出处
《燃烧科学与技术》
EI
CAS
CSCD
2004年第4期308-313,共6页
Journal of Combustion Science and Technology
