利用Fluent计算流体力学软件对新型旋风气幕式排风罩工作流场及有害物分布进行了数值模拟,并与传统排风罩进行了对比。结果表明:旋转射流屏蔽作用下的抽吸流场具有中部压力较低和提高抽吸能力的作用;新型旋风气幕式排风罩不仅能有效地控制有害物扩散,而且可以实现远距离捕集有害物及以较小的排风速度排放有害物。 Fluent computational fluid dynamics software is used to simulate the distribution of the working flow field and the harmful substances of the new cyclone air curtain exhaust hood, and compared with the traditional exhaust hood. The results show that the suction flow field under the action of rotating jet shield has the effect of lower central pressure and suction capacity. The new cyclone air curtain exhaust hood can not only effectively control the spread of harmful substances, but also achieve long-distance capture Harmful substances and harmful substances should be discharged with less exhaust speed.