桶灌室CS_2气体连续泄漏扩散的三维数值模拟

Three dimensional numerical simulation of CS_2 gas continuous leakage and diffusion in a bucket chamber

以某CS_2桶罐储存室为对象,利用Fluent软件对CS_2连续泄漏扩散进行数值模拟,研究CS_2扩散规律及影响因素。结果表明:无风状态下,CS_2扩散速度较小,以泄漏源为中心沿四周近地面扩散且易在墙角积聚;障碍物的存在对CS_2扩散速度有一定的阻碍作用;不同的泄漏位置形成的CS_2爆炸极限范围不同,水平泄漏比垂直泄漏更易积聚,更危险;不同通风速度对CS_2扩散速度影响较大,通风速度越大,泄漏危险域越小。研究结果可对CS_2桶罐储存室室内CS_2泄漏扩散的危险域进行有效预测,为泄漏预警装置安装、防爆叉车主动防护系统的构建及泄漏事故应急方案提供参考。

Taking a CS2 tank storage room as an object,numerical simulation of CS2 continuous leakage and diffusion was carried out by using the software Fluent,in pursuit of the CS2 diffusion law and its influencing factors.The results show that under the wind-free condition,CS2 centers around the leakage source,and diffuses at a lower velocity near the ground and tends to accumulate in the corner.The presence of obstacles has a certain impediment to the diffusion velocity of CS2.The CS2 explosion limit range differs from horizontal leakage to vertical leakage,the former being more prone to accumulation and more hazardous than the latter.Different ventilation rates have a great influence on the CS2 diffusion velocity,and the greater the ventilation rate is,the smaller the hazardous area of leakage is.The results couldeffectively predict the hazardous area of CS2 leakage and diffusion inside the CS2 tank storage room,and provide references for installation of the leakage alarm device,construction of the forklift active protection system and accident emergency plan.