中文摘要：

为了定量评估近墙乙醇池火燃烧的危险性,根据乙醇池火燃烧辐射热平衡方程,建立了简化的墙体点源辐射计算模型,与火焰高度、近墙距离等参数相关联,进而得到近墙乙醇池火墙壁热反馈下燃烧速率的理论增量,并考虑到火焰辐射的增量对燃烧速率的影响,计算得到火焰对燃烧速率的理论增量。同时,在标准燃烧室进行了5种尺寸、不同近墙距离的方形乙醇池火的验证试验。结果表明,近墙乙醇池火的平均火焰高度和燃烧速率随油盘直径增大而增大,随距墙边距离减小而增大。与距墙边30 cm的墙边火平均火焰高度相比,紧贴墙壁的平均火焰高度上升16%-20%;与距墙边30 cm的墙边火燃烧速率相比,紧贴墙壁的燃烧速率上升12%-16%。乙醇墙边池火的燃烧速率理论增量与实际测量值的偏差在5%-34%,二者具有较好的一致性,充分说明近墙乙醇池火燃烧速率的增量主要是墙壁的热反馈和火焰的热反馈共同作用的结果。

英文摘要：

The paper intends to introduce a simplified wall-point source radiation calculation method we have developed for the quantitative assessment of the risk of ethanol pool fire in accordance with the radiation balance model of the ethanol surface. To establish the method, we have taken into account the mean flame height and the distance to the pool wall, thus inferring that the theoretical burning rate tends to grow with the wall feedback. In addition, we have also gained the flame radiation, and gained a theoretical combustion rate increment while calculation is done by way of calculating the flame feedback. At the same time, we have obtained the sum of the wall feedback burning rate increment and the flame feedback burning rate increment. In addition, we have done experiments on the square ethanol pool fires with the side lengths of 24 cm, 27 cm, 30 cm, 33 cm and 36 cm being adjacent to the wall in different distances. The experiments have shown that the mean flame height tends to rise with the increase of pool sizes and decrease with the distance prolonging between the fuel and the vertical wall. The mean flame heights in a distance close to the wall were found higher about 16% -20% than those in a distance of 30 cm＇ s. The burning rate has also been found increasing with the pool size and decreasing with the increase of the distance between the fuel and the vertical wall. The burning rate at the distance of zero em is higher about 12% - 16% than that in a distance of 30 cm. In addition, we have also found the value mea- sured with the burning rate increment keeps in perfeet accordance with the theoretieal calculation with a mere relatival error of 5 % - 30 %, which fully illustrates that fire burning rate inerement of the approximate wall ethanol pool mainly consists of the wall thermal feedback and the flame thermal feedback.