Abstract:

This paper reviews the jet fire due to the leakage of combustible gas in high pressure vessels. The physical models are given and analyzed for the state physical parameters of steady-state gas flow at the leakage orifice, the flame geometry and size of jet fire after the ignition of the leakage gas, and jet flame radiant heat flux, respectively. The high pressure gas leakage models are extensively introduced respectively based on the ideal gas and Abel-Noble state gas equations, then the flame length model, flame width model and lift-off height model are presented to predict the jet flame geometry and size, finally the point source radiation model, multipoint source radiation model, solid flame radiation model and line source radiation model are given and compared. The three kinds of physical models are linked and coupled to analyze the thermal hazard of jet fire at different leakage conditions. Analysis shows the considerable application of the linked physical model.

Key words: safety, model, state equation, jet fire, flame length, lift-off height, radiant fraction, thermal radiation

摘要：

以高压可燃气体泄漏诱发的喷射火为研究对象，对泄漏过程中喷口处稳态气流状态参数变化及其被点燃之后的喷射火火焰形态与辐射热流场预测模型研究进展进行了综述。归类分析了基于理想气体状态方程和Abel-Noble状态方程的高压气体泄漏模型及其适用情况，并对不同浮力控制和动量控制范围的几种喷射火火焰几何尺寸模型进行了概括性总结，同时对不同火焰形态下的点源、多点源、固体以及线源4种热辐射模型进行了汇总，最终提出将3种模型耦合联用以建立适用于不同泄漏条件下喷射火热灾害分析预测方法。分析表明，该分析预测方法具有很好的适用性。

关键词: 安全, 模型, 状态方程, 喷射火, 火焰长度, 推举高度, 辐射分数, 热辐射