钠气溶胶在事故通风管道中的沉降研究

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Analysis on Sedimentation Rate of Sodium Aerosol In Emergency Ventilation System

摘要: 从沉降的机理出发,在对湍流流场作合理简化的基础上,对钠气溶胶的物理性质及在迁移过程中影响其沉降的多种因素进行分析,给出一维管道内气溶胶的输运方程,建立计算事故通风管道中沉降率的物理模型。该模型的分析表明,影响钠气溶胶沉降率的主要因素为重力、布朗凝聚和湍流等,其他的如布朗扩散等均可忽略。
- 钠气溶胶 /
- 沉降率 /
- 重力 /
- 布朗凝聚 /
- 湍流扩散 /
- 湍流凝聚 /
- 惯性沉降
Abstract: In the paper, the chemical and physical characteristics of sodium aerosol particles as well as factors that influence the sedimentation rate of sodium aerosol during its transport are analyzed. Besides, a simplified model is given to calculate the sedimentation rate when aerosol getting through the emergency ventilation system. It has been found that the sedimentation rate is largely determined by gravity, turbulent coagulation and turbulent, other factors, such as brownian diffusion, could be ignored.
- Sodium aerosol /
- Sedimentation rate /
- Gravity /
- Brownian coagulation /
- Turbulent diffusion /
- Turbulent coagulation /
- Inertial settling