气体污染物进入超压防护舱室后的运动状态数值模拟
Numerical simulation for gas contaminant movement and distribution inside compartment with overpressure protection
摘要：
为研究气体污染物进入舱室后在超压通风系统作用下的运动状态和分布规律，运用计算流体动力学方法和室内零方程湍流模型，进行了气流速度场和污染物示踪气体CO2浓度场的瞬态数值模拟，分析了舱室受气体污染物污染的全过程。结果表明，前10 s进入舱室的体积分数为0.005 的CO2气体，在超压通风系统开启后120 s内体积分数迅速衰减至0.000 1以下，舱室通风系统能够满足稀释污染物的要求。
Abstract：
To investigate the gas contaminant movement and distribution inside compartment with overpressure ventilation system, based on computational fluid dynamics (CFD) and an indoor zeroequation turbulence model, simulates the transient velocity and concentration distribution of tracing gas CO2 and analyses the whole process in the compartment being contaminated. The results indicate that the volume fraction of CO2 reduces rapidly from 0.005 to 0.000 1 in 120 seconds after starting up the overpressure ventilation system and the compartment ventilation system can satisfy the requirement of contaminant dilution.
Keywords:gas contaminant, compartment with overpressure protection, CO2, concentration field, numerical simulation