西藏低压环境对油池火火焰形状的影响  

Influence of Tibet’s Low Pressure Environment on Flame Shape of Pool Fire

作　　者：徐伯乐[1,2] 李元洲[2] 祝实[2] 毛少华[2] 匡萃芃[2] 

机构地区：[1]中国舰船研究设计中心,武汉430000 [2]中国科学技术大学火灾科学国家重点实验室,合肥230027

出　　处：《燃烧科学与技术》2011年第6期551-557,共7页Journal of Combustion Science and Technology

基　　金：国家"十一五"科技支撑计划资助项目(2006BAK06B07)

摘　　要：通过拉萨和合肥两地开展相同尺寸的甲醇和汽油油池火燃烧实验,研究了两地油池火燃烧特性参数的不同,分析低氧低压条件对于燃烧特性参数的影响机理.研究发现,在燃料类型和尺寸相同的情况下,燃料在拉萨的失重速率比合肥慢,产生的CO浓度更高;采用火焰图像分析对两地火焰图像进行处理,发现相同小尺寸的油盘燃料燃烧,拉萨火焰面积比合肥要大,火焰宽度比合肥要窄,平均火焰高度比合肥要高;通过实验数据拟合出适合在高原低氧低压环境下的平均火焰高度公式.The same-size methanol and gasoline pool fire experiments were carried out in Lhasa and Hefei. The difference of combustion characteristics between the two places was investigated and the mechanism affected by low pressure and low oxygen was analyzed. It＇s discovered that, with the same fuel type and pan size, the fuel weight loss rate in Lhasa was slower than that in Hefei, and the CO concentration after combustion was higher. Based on flame image analysis, the flame images in the two places were processed. And it＇s found that in the same-size small oil pan, the flame area was larger, the flame width narrower and the average flame height higher in Lhasa than those in Hefei. The average flame height formula suitable for Plateau low pressure and low oxygen was established by experimental data fitting.

关 键 词：油池火 质量燃烧速率 图像分析 平均火焰高度 高原环境 

分 类 号：TK16[动力工程及工程热物理—热能工程]