Research On The Relationship Between Fire Characteristics And Wall Trace

With the development of economic and the improvement of people’s life level,the frequency of fire is become more and more higher,and the loss is also increased.When fire happened in an enclosure,the wall will affect the fire burning,at the same time,the fire also can produce trace on the wall with different degree.But now,the relationship’s research between the fire’s characteristics and wall’s traces is still not perfect,and it still lacks the systematic comparison and analysis.In this paper,the fire combustion characteristics and the wall trace with different experimental conditions were studied,and their change rules with the experimental condition got further analyzed.For the first,a theoretical calculation about fire combustion parameters was made in this paper,and the formation mechanism and classification of wall traces are introduced.Secondly,take the tack fire as combustion source,the change rule of the fire combustion characteristics and the forms of wall traces with different fire size and different distance between fire and wall were studied.The combustion characteristics consists of a series of combustion parameters,these parameters including the heat release rate maximum value,average value,the average flame height,flame temperature average value,maximum value,the center line average temperature distribution of flame.It was found that,when the fire near the wall,the change rule of fire combustion parameters follows the diameter is near free burning.The wall near the fire make the fire burning fierce,with the decrease of the distance between oil tank and wall,the influence of the wall to the combustion is become significantly.The increasing of oil directly lead to the extension of the burning time,it also increases some combustion parameters at the same time.The fire duration make an obvious influence on flame temperature.For the wall trace:the bigger the tank’s diameter,the nearer the tank to the wall and the longer the burn time make the wall trace more obvious.Take the reproducibility of the experimental result into account,the repetitive experiments in the case of same situation were made,through the analysis of the standard deviation of fire parameters,the experimental error was got described.The analysis of fire combustion parameters were focused on in this paper and the data fitting to the experimental findings was carried on,so as to express the result more clearer.Due to lack unified quantitative description of the wall trace,only a simple qualitative description been taken.In order to get the uniform description of wall trace,the further study can expand the parameters which could be quantitative describe.Extend the fire type,and put the wall roughness into consider,the experiment may get a better result.