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碳氢化合物泄漏引起的火灾事故是海洋平台作业过程中的主要威胁之一,往往伴随着人员伤亡、环境污染、平台停产等灾难性后果。以某400ft水深自升式平台为例,采用DOW火灾指数分析法确定了火灾危险区域,并基于计算流体力学方法,在对湍流模型、燃烧模型、辐射模型等关键技术进行研究的基础上,对钻井区域发生火灾后的温度、热辐射、CO浓度分布变化进行了瞬态分析,最后对风速和燃烧速率的影响进行了讨论,为探索自升式平台火灾扩散机理提供了一些参考。
Fire accidents caused by hydrocarbon leakage are one of the major threats to the operation of offshore platforms, often accompanied by catastrophic consequences of casualties, environmental pollution and the shutdown of platforms. Taking a 400ft jackup platform as an example, the fire danger zone was determined by DOW fire index analysis method. Based on computational fluid dynamics (CFD) method, the key technologies of turbulence model, combustion model and radiation model were studied. The transient analysis of the changes of temperature, heat radiation and CO concentration distribution after the fire in the drilling area is carried out. Finally, the influence of the wind speed and the combustion rate is discussed, which provides some references for exploring the fire diffusion mechanism of the jack-up platform.