【摘要】：為揭示火場中火源對外部空間的熱傳遞規(guī)律,以開放空間庚烷油池火燃燒為例,結(jié)合油池火熱平衡方程建立了油池火熱傳遞簡化模型,提出了油池火對外熱效應(yīng)的計(jì)算公式;使用庚烷油池火CFD模型,仿真分析了穩(wěn)定燃燒階段油池火對外輻射效應(yīng),并對油池火對外熱效應(yīng)進(jìn)行了理論分析和驗(yàn)證。研究結(jié)果表明:基于煙羽流對外熱效應(yīng)的熱傳遞理論模型能夠?qū)Σ煌瑹醾鬟f方式進(jìn)行估算,反應(yīng)火場中熱傳遞規(guī)律。在中大尺度油池火燃燒過程中,油池火對外熱效應(yīng)主要是指火羽流熱輻射和熱對流效應(yīng),其中穩(wěn)定燃燒階段熱對流約占總熱量的60%,是中大尺度火災(zāi)蔓延的主導(dǎo)因素。
[Abstract]:In order to reveal the heat transfer law between the fire source and the outer space, a simplified model of oil pool fire heat transfer is established by taking the heptane oil pool fire combustion in open space as an example, and the calculation formula of the external heat effect of oil pool fire is put forward in combination with the oil pool fire heat balance equation. Using the CFD model of heptane oil pool fire, the external radiation effect of oil pool fire in stable combustion stage is simulated, and the external heat effect of oil pool fire is theoretically analyzed and verified. The results show that the theoretical model of heat transfer based on the external heat effect of plume can estimate different heat transfer modes and the heat transfer law in the reaction fire field. In the process of medium and large scale oil pool fire combustion, the external thermal effect of oil pool fire mainly refers to the heat radiation of plume and thermal convection effect, in which the heat convection accounts for about 60% of the total heat in the stable combustion stage, which is the leading factor of fire spread in medium and large scale.
【作者單位】： 海軍工程大學(xué)動力工程學(xué)院;
【分類號】：TU998.1

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