利用雷诺应力模型(RSM)模拟空调系统通风弯管内气相的湍流流动,采用拉格朗日随机轨道模型模拟追踪弯管内颗粒运动轨迹,分析了不同送风速度、颗粒粒径下空调系统通风弯管内颗粒物沉积特性。结果表明:弯管外壁面附近压力大,内壁面附近压力小,而内壁面附近流速大;弯管截面内有明显的二次流,其结构为旋转方向相反的两涡结构;颗粒粒径增加,在空调系统通风弯管壁面上的沉积率增加;风速增加同样使得通风弯管壁面上的沉积率有所增加。 The Reynolds stress model (RSM) was used to simulate the turbulent flow of the gas phase in the draft tube of the air conditioning system. The Lagrangian random orbit model was used to simulate the trajectory of the particles in the elbow. The air distribution system ventilation Sediment particulate matter deposition characteristics. The results show that the pressure near the outer wall of the elbow is large, the pressure near the inner wall is small, and the flow velocity near the inner wall is large. The secondary flow in the elbow has obvious two-vortex structure with opposite vortex structure. , The deposition rate on the wall surface of the ventilation elbow of the air conditioning system increases; and the increase of the wind speed also makes the deposition rate on the wall of the ventilation elbow increase.