障碍物遮挡条件下细水雾与油池火相互作用的实验研究

障碍物影响下细水雾灭火有效性的研究具有重要的意义。研究了障碍物与火焰的相对位置、细水雾工作压力、喷头距离火焰垂直距离及水平距离等因素对灭火有效性的影响,以及细水雾作用下火灾烟气中一氧化碳、二氧化碳及氧气浓度的变化规律等。结果表明:高压细水雾可以有效扑救部分有障碍物遮挡的油池火,同时喷头距离火焰的水平距离和垂直距离也显著影响着细水雾的灭火速度;高压细水雾在灭火过程中火场的氧气浓度明显升高,二氧化碳和一氧化碳浓度明显降低;细水雾工作压力较低时,一氧化碳浓度反而有所增加。

Experimental study on the interaction of water mist with oil pool fires sheltered by an obstacle

It is very important to study the fire suppression efficiency with water mist affected by obstacles. The effects of obstacle position away from the flame, working pressure of water mist system, axial and radial distance between the water mist nozzle and flame on water mist fire suppression efficiency, and the variation of CO, CO2 and O2 concentrations were studied in this paper. The results show that the oil pool fire partly sheltered by obstacle can be efficiently extinguished by high pressure water mist, and the fire extinguishing time was obviously affected by the axial and radial distance between the water mist nozzle and flame; during the fire suppression process with high pressure water mist, the concentration of O2 increased while that of CO or CO2 decreased obviously. However, for the cases with low pressure water mist, the concentration of CO increased.