Abstract Hydrocarbon pool fires can cause serious fire accidents. This study focused on the flame-merging behavior and pulsation frequency of annular hydrocarbon pool fires with various inner and outer diameters. Experiments were performed with annular pool fires having outer diameters (D) in the range of 0.15–0.55 m and inner diameters (d) in the range of 0.05–0.45 m. The fuel used was n-heptane. The flame-merging probability and pulsation frequency of annular pool fires with various inner and outer diameters were examined. With the development of the pool fire, the initially produced “annular flame” finally merged. According to the dimensional analysis, a fitted correlation of the piece function with different heat-release rates and annular-pool sizes was proposed for describing the flame merging and pulsation frequency, and the proposed correlation in this work is suitable for no wind conditions.

中文翻译：

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不同内外径环状油气藏火的合焰概率及脉动频率试验研究

摘要 碳氢化合物池火灾会导致严重的火灾事故。本研究重点研究了各种内径和外径的环状烃池火灾的火焰合并行为和脉动频率。使用外径 (D) 在 0.15–0.55 m 范围内和内径 (d) 在 0.05–0.45 m 范围内的环形池火进行了实验。使用的燃料是正庚烷。研究了不同内径和外径的环形池火的火焰合并概率和脉动频率。随着池火的发展，最初产生的“环形火焰”终于融合了。根据量纲分析，提出了具有不同放热率和环形池尺寸的片函数的拟合相关性来描述火焰合并和脉动频率，