3D Numerical Simulation of Aerodynamic Characteristics of a Gas Filter

• 作者: Derui Yang Fangfang Si Guolin Han Pengfei Lian Pingwei Ye Shaoyue Hao
• 来源期刊: 应用数学与应用物理(英文)
• 学科: 物理学
• 关键词: NUMERICAL Simulation GAS FILTER Air Age POROUS MEDIA
• 年，卷（期）: 2019,（8）
• 页码范围: 1920-1928
• 页数: 9页
• 分类号: O35

摘要

The filter paper and activated carbon which filled inside the gas filter have porous media characteristics. In order to study the flow field structure in the filter layer and the activated carbon layer, Computational Fluid Dynamics method is used to simulate the aerodynamic characteristics of a simplified gas filter. The inertial and viscosity parameters of porous media are solved by Forchheimer equation. The three-dimensional N-S equation and the modified low Reynolds number k-ε turbulence model are adopted to analyze the influence of the explosion-proof plate on the gas filter’s aerodynamic characteristics. The results showed that the air age in the upstream of the activated carbon plates was small, which easily caused the rapid penetration of the Poisonous gas. And in the downstream and around of the activated carbon plates, the air age is larger, formed dead zone, the utilization rate of activated carbon is lower. The explosion-proof plate increases the pressure drop of the gas filter, the air age distribution in the filter layer is more uniform and the utilization rate of filter paper is improved. However, the explosion-proof plate has little influence on the flow field structure of the activated carbon layer.