风速及泄漏量对无组织排放的苯污染物浓度影响的CFD模拟研究

利用Fluent软件对某化工厂苯污染物的无组织排放在居民区的扩散规律进行了模拟，研究并比较了风速及无组织泄漏量对污染物浓度的影响。研究结果表明：存在伙，当实际泄漏量大于QC时，敏感点的苯污染物浓度随风速增大而减小；当泄漏量小于伙时，敏感点的苯污染物浓度随风速增大而增大。风速较小时，随着敏感点到泄漏源距离的增大，敏感点的污染物浓度有减小趋势；风速较大时。敏感点的苯污染物浓度不仅与敏感点到泄漏源的距离有关，还与污染物的泄漏量有关。在污染物扩散方向的下风向街区内，迎风一侧的污染物浓度高于背风一侧的污染物浓度。

CFD Simulation Study on Influence of Wind Velocity and Leak Volume on Benzene Concentration

This paper simulates fugitive discharged benzene dispersion in the neighborhood area in one chemical plant using Fluent software, and analyzes the influence of wind velocity and leak volume on its concentration. The results show sensitive points benzene concentration is decreased by the wind velocity increases when the actual leak volume is more than Qc; sensitive points benzene concentration is increased by the wind velocity increases when the actual leak volume is less than Qc. When wind velocity is low, the concentration is less in the sensitive points; when wind velocity is high, it not only is relevant with the distance from leak resource to sensitive points, but also with the leak volume. From the dispersion direct, the concentration in the block upwind side is higher than in the downwind side.