技术中心

【英文篇名】 Numerical simulation for gas contaminant movement and distribution inside compartment with overpressure protection 【作者中文名】 徐新喜; 韩浩; 赵秀国; 王太勇; 【作者英文名】 Xu Xinxi~★Han Hao Zhao Xiuguo Wang Taiyong★Institute of Medical Equipment; Academy of Military Medical Sciences; Tianjin; China; 【作者单位】 军事医学科学院卫生装备研究所; 天津大学 国家生防装备工程技术研究中心; 国家生防装备工程技术研究中心; 【文献出处】 暖通空调, Heating Ventilating 超压防护舱室; CO_2; 浓度场; 数值模拟; 【英文关键词】 gas contaminant; compartment with overpressure protection; CO_2; concentration field; numerical simulation; 【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CO_2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10s进入舱室的体积分数为0.005的CO_2气体,在超压通风系统开启后120s内体积分数迅速衰减至0.0001以下,舱室通风系统能够满足稀释污染物的要求。 【英文摘要】 To investigate the gas contaminant movement and distribution inside compartment with overpressure ventilation system,based on computational fluid dynamics (CFD) and an indoor zero-equation turbulence model,simulates the transient velocity and concentration distribution of tracing gas CO_2 and analyses the whole process in the compartment being contaminated.The results indicate that the volume fraction of CO_2 reduces rapidly from 0.005 to 0.000 1 in 120 seconds after starting up the overpressure ventilation...