船舶机舱复杂通风环境下小尺度油池火焰形态特性研究
Study on Flame Shape Characteristics of Small Scale Oil Pool in Complex Ventilation Environment of Ship Engine Room

现有船舶机舱火灾的研究中，较多地忽略了舱内复杂通风对油池火燃烧的影响。本文基于具有复杂管路通风的受限空间，以正庚烷为燃料，针对直径为D = 10 cm的小尺度圆形油池，对0~4.0 m/s不同风速下的油池火燃烧特性进行实验研究，并对其火焰形态进行了分析。研究结果表明：油池火焰分为四个阶段，不同风速下火焰的状态基本相同，具体火焰形状的复杂程度与横向风速的大小呈现出正相关；火焰的摆动与风速存在一定的耦合关系，并呈现出了周期性，其周期与风速呈二次方关系。
In the existing research on engine room fire of ships, most of them ignore the influence of complex ventilation in the cabin on the combustion of oil pool fire. In this paper, based on the confined space with complex pipe ventilation, with nheptane as fuel, for the small-scale circular oil pool with diameter D = 10 cm, the combustion characteristics of the oil pool under different wind speeds of 0~4.0 m/s were studied experimentally, and the flame morphology was analyzed. The results show that the flame of oil pool can be divided into four stages, and the flame status is basically the same under different wind speeds, but the complexity of the flame shape is positively correlated with the transverse wind speeds. There is a certain coupling relationship between the flame swing and the wind speed, and the flame swing shows a periodicity. The periodicity shows a quadratic relationship with the wind speed.