中文摘要：

在精炼镁车间内，广泛存在着双热源作用下的侧吸罩，研究双热源之间的影响将为研究双热源产生污染气体的捕集提供一定的理论依据．本文在实验与数值模拟误差分析的基础上，运用数值模拟方法研究了在同一局部排风系统中存在两个热源(主热源、辅热源)时，辅热源位置、辅热源初始速度以及辅热源初始温度对侧吸罩流场和排风罩捕集主热源产生污染气体捕集效率的影响．研究结果表明：(1)当辅热源位于主热源与排风罩之间时，随着辅热源初始速度的增加，侧吸罩的捕集效率先增大后减小．最大捕集效率出现在初始速度为1.0m/s时．(2)当辅热源位于排风罩相对主热源之外时，随着辅热源初始温度从300K增大到600K，侧吸罩的捕集效率降低8.36%．

英文摘要：

Side suction hoods influenced by muti-heat sources have been extensively adopted in magnesium metal refining plants.However, the combined effects of two heat sources have not been thoroughly studied. In this paper, based on the validation of simulation,the effects of the source position, initial velocity and initial temperature of auxiliary heat source on the efficiency of side suctionhood,which used to trap the polluted gas produced by the primary heat source, were studied via numerical simulation for an exhaustsystem with two heat source. The results showed that, 1)When the auxiliary heat source lies between the primary heat sourceand the exhaust hood, by increasing the initial velocity of the auxiliary heat source, the capture efficiency of side suction hood mayincrease at first and decreases while the maximum efficiency reached 70% at velocity 1.0; 2)When the auxiliary heat source is in theopposite derection that exhaust hood is relative to the primary heat source, by increasing the initial temperature of anxiliary heatsource from 300 K to 600 K, the suction-side trapping efficiency was decreased by 8.36%.