摘要
采用流体力学软件FLUENT的物质传输模块对不同风速情况下氯气绕障碍物泄漏扩散过程进行了数值模拟,获得了计算区域内风流场分布以及氯气泄漏随时间变化的扩散规律。结果表明在障碍物背面会形成漩涡,风流不畅使有害气体积聚不易扩散,且氯气泄漏过程存在明显的重气效应,容易向地面沉降,建筑物前方近地面处为氯气扩散高浓度区。当风速较小时,氯气扩散较慢,在越过障碍物时有直接向地面沉降趋势;当风速增大时,氯气云团在下风向扩散速率明显增大,在垂直方向扩散速率减小。
Material transfer module in the chlorine leakage and diffusion process around obstacles with different velocity was buih based on the software FLUENT; airflow distribution and chlorine diffusion in the calculating region were obtained. The results show that vortex are formed in the back of obstacles, the diffusion of harmful gas is obstructed by unsmooth airflow, chlorine subsides to ground obviously and high concentration area usually exists in the front of the building near the ground. When air velocity is low, chlorine diffuses slowly and trends to subside to ground directly around obstacles; as air velocity increases, chlorine diffusion rate increases obviously at the downwind, while the rate reduces in vertical direction.
出处
《山东化工》
CAS
2014年第1期28-30,共3页
Shandong Chemical Industry
关键词
氯气扩散
障碍物
泄漏速率
数值模拟
chlorine diffusion
obstacle
leakage rate
numeral simulation
