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首页> 外文期刊>Combustion, Explosion, and Shock Waves >Modeling the Process of Methane-Air Plume Extinguishing by a Solid-Propellant Pulse Aerosol Generator
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Modeling the Process of Methane-Air Plume Extinguishing by a Solid-Propellant Pulse Aerosol Generator

机译:固体推进剂脉冲气溶胶发生器对甲烷-空气羽流灭火过程的建模

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摘要

Operation of a pulse aerosol system of fire fighting designed for effective extinguishing of fires in gas wells is modeled by an example of quenching a methane-air subsonic plume escaping from a nozzle. The system consists of two separate parts: a charge of a unitary solid propellant (gas generator) and a container with fine-grain powder of a flame retardant. The combustion of the mixture is described by a one-step global reaction; the effect of the concentration of flame-retardant vapors on the combustion process is taken into account through reduction of the pre-exponent in the Arrhenius law and is described by an empirical dependence. A computational experiment shows that the use of the pulse aerosol system of fire fighting ensures effective transport of fine aerosol particles of the flame retardant and its vapors to the combustion zone in amounts sufficient to suppress the ignition spot.
机译:设计了一个用于有效扑灭气井中火灾的脉冲灭火气溶胶系统,其操作以淬灭从喷嘴逸出的甲烷-空气亚音速羽流为例。该系统由两个独立的部分组成:装填单一固体推进剂(气体发生器)和装有细粒阻燃剂粉末的容器。混合物的燃烧通过一步全局反应来描述。通过减少阿雷尼乌斯定律中的预指数来考虑阻燃蒸气浓度对燃烧过程的影响,并通过经验进行描述。计算实验表明,使用脉冲气溶胶灭火系统可确保将阻燃剂及其蒸气的细小气溶胶颗粒有效地传输到燃烧区,其数量足以抑制着火点。

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