ABSTRACT The influences of shape characteristics and pressure on n-Heptane ring fire were investigated through two groups of experiments. In group A, the ring fire with varying shape characteristics was conducted. In group B, the ring fire was performed under sub-atmospheric pressures including 45 kPa, 60 kPa, 75 kPa, and 90 kPa. The results show that the mass loss rate is determined by combined results of air entrainment and heat dissipation effect. The flame structure is divided into merged flame and separated flame. The axis temperature has no significant difference in growth stage but presents a corresponding relationship in decrease stage.

中文翻译：

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亚大气压下不同形状特征的正庚烷环火实验研究

摘要 通过两组实验研究了形状特性和压力对正庚烷环火的影响。在A组中，进行了具有不同形状特征的环火。B组在45kPa、60kPa、75kPa和90kPa亚大气压下进行环火。结果表明，质量损失率是由空气夹带和散热效果的综合结果决定的。火焰结构分为合并火焰和分离火焰。轴温在生长阶段无显着差异，但在下降阶段呈现对应关系。