室内烹饪所产生的污染物是室内空气污染的重要来源,作为公共建筑的重要组成部分，餐饮厨房的烹饪方式多样，其产生的污染物数量远远高于家庭厨房，因此对于餐饮厨房空气污染中气溶胶扩散的研究，有利于对厨房室内空气品质实现更加高效的控制和改善。 本文通过对西安市典型商业综合体内的中式餐饮（火锅）店进行室内空气品质测试分析。结合实测条件，进行数值模拟验证并建立针对两个不等热源不同热源条件进行数值模拟，观察热源上方热羽流状态，结合羽流理论分析气溶胶扩散机理，并对气溶胶扩散的控制和改善进行探讨。 研究结果表明:通过fluent数值模拟，能够很好的对室内环境中热源上方热羽流流动状态进行预测。存在两个热源时，两个热源的间距、温度、强度及尺寸都会对热源上方羽流的状态产生影响：热源间距较小时，两个热源形成的热羽流将会产生耦合和干涉；热源温度和强度越高，热源形成的热羽流越稳定规则；热源强度不变时，热源尺寸越大形成的热羽流将更加稳定。热源产生的热羽流受到干扰后易出现混乱无序的状态，其规律与羽流基本理论存在较大的差异，故在实际应用中，要高效的进行污染物捕集和排风，就要综合考虑热源条件、室内气流组织、自然通风条件等。 通过对两个不等热源产生的热羽流进行数值模拟和热羽流基本理论分析可以发现，热羽流中携带物的浓度不影响羽流流动的情况下，热源产生的气溶胶受到重力、浮力和流体曳力的作用而运动。在不受外界干扰的情况下与羽流流动规律相一致，但有一定的速度滑移；当受到外界干扰时，热羽流不够稳定，气溶胶扩散机理将很难把握，故针对热源产生的气溶胶的捕集可采用两种方式：在羽流初始端将羽流打乱，使热源产生的气溶胶没有足够的初始动量进行扩散，再在源头处将其排除；充分利用热羽流的特性，结合罩口排风与气溶胶污染物运输规律，寻求一个高效的排风捕集方式。

The pollutants generated by indoor cooking is an important source of indoor air pollution,as an important part of public buildings,Commercial Kitchen have a variety of cooking methods,and generate much more pollutants than the family kitchen.Therefore, the study of air pollution in the catering kitchen aerosol diffusion,is conducive to the control of the kitchen indoor air quality. In this paper,through the indoor air quality text of the typical Chinese restaurant (pot) of the Commercial Complex in Xi'an,analyze the text data.Contact the text data to establish model to simulate the actual device，based on the Verification Model,establish the model to do the numerical simulation for different heat conditions,observed the state of the thermal plume above the heat source,analyze the diffusion mechanism of aerosol pollutants combine the thermal plume theory, and the control of the aerosol pollutants were discussed. The results show that:By numerical simulation,can forecast the state of the thermal plume generate from heat source in the indoor environment.When there are two heat sources,the two heat source spacing,temperature,strength and size will have an impact on the state above the heat source plume:when the space is smaller,the thermal plume generate from two heat source will produce the coupling and interference;with the higher temperature and intensity,the heat source generate the thermal plume will more stable and rule;under the same intensity condition of heat source,the lager the size of heat source the thermal plume will be more stable.The thermal plume prone to appear chaotic air flow state after disturbance，therefore to better utilization of the thermal plume should consider reducing the interference by external factors. Through the numerical simulation of the thermal plume generate from two unequal heat source and the theory analysis can be found that in the case of the plume carried concentration does not affect the plume flow,the aerosol that generate from heat source move by the interaction of gravity,buoyancy and fluid drag force,when without disturbance the movement rule consistent with plume flow pattern,and there has a certain velocity slip.But when the thermal plume was disturbed and not stable enough, it will be difficult to grasp the diffusion mechanism,so capture the aerosol can use this two ways:Disrupt the thermal plume in the heat source,so that there is no enough initial momentum provide to aerosol diffusion produced from heat source,then exhaust the aerosol at source.Make full use of the properties of thermal plume,combine the cover mouth ventilation and he transport of aerosol pollutants seeking an efficient way to capture and exhaust the aerosol.