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为研究飞机客舱空调的送风速度对火灾阴燃阶段释放CO的影响以及不同送风速度下CO的扩散规律对人体的危害影响,建立了A320飞机客舱的仿真模型,基于流体动力学控制方程,模拟了不同送风速度下飞机客舱内的风速场和CO浓度场。分析了在不同方向上CO的扩散规律,得到了空调送风速度与客舱内CO浓度值及扩散范围之间的关系。计算了不同送风速度下人体呼吸位置的排污效率,得到送风速度与排污效率之间的关系,所得的数值模拟结果为飞机客舱火灾阴燃阶段CO扩散规律及毒性研究提供依据。
In order to study the influence of the air blowing speed of aircraft cabin air conditioner on the release of CO during the smoldering phase of fire and the harmful effects of carbon monoxide on the human body under the different blowing velocities, a simulation model of the A320 cabin was established. Based on the fluid dynamics control equation, The wind speed field and CO concentration field in the cabin of the aircraft under different air blowing velocities are simulated. The diffusion rules of CO in different directions were analyzed, and the relationship between air supply air velocity and CO concentration in passenger cabin and diffusion range was obtained. The relationship between blowdown efficiency and discharge velocity was obtained. The numerical simulation results provided the basis for the study of diffusion and toxicity of CO during the smoldering phase of aircraft cabin fires.