某报废弹药销毁车间气流组织数值模拟分析

Numerical Calculation of Air Distribution on TNT Dust in a Scrapped Ammunition Destroyed Workshop

利用FLUENT软件,采用标准的κ-ε两方程湍流模型和SIMPLEC的压力–速度耦合算法对报废弹药销毁车间的气流组织进行了数值模拟;在流速场计算收敛的基础上,采用颗粒轨道模型,对报废弹药销毁车间内的颗粒物分布进行了数值模拟。数值模拟结果表明,在现有的送回风形式下,改变送风速度对车间内气流组织影响较小,而且车间内某些区域的气流流动易形成死区;在相同条件下,粒径小的颗粒物易扩散到车间顶部或高度较高的水平面,而大粒径的颗粒物则不易向上扩散,车间内某些区域颗粒物的浓度较高。对报废弹药销毁车间通风系统的设计提出了优化性的建议。

The air distribution of the scrapped ammunition destroyed workshop is numerically simulated using FLUENT software based on the standard κ-ε two equations turbulence model and SIMPLEC pressure-speed coupled algorithm;then the particle distribution of the scrapped ammunition de-stroyed workshop is numerically simulated by the discrete phase model of FLUENT after the air flow field calculating convergence. Finally, the results of numerical simulation are analyzed. The results show that changing supply air speed has little influence for the air distribution of the workshop and some regional air flow is easy to form dead zone in the existing supply and back air form. Under the same conditions, small size of particulate easily spreads to the top of workshop and higher level, but large size of particulate does not easily spread to the top of workshop, and the concentration of the particle is higher in certain areas of the workshop. The optimizing advices are put forward for the ventilation system designing of the scrapped ammunition destroyed workshop based on the results of numerical simulation.