为研究稳焰器对增压锅炉旋流燃烧器冷态流场的影响，建立了带小孔稳焰器的旋流燃烧器三维模型，基于Fluent软件，采用Realizablek-ε模型探究不同锅炉负荷（100%、50%、30%）、不同稳焰器尺寸（100mm、120mm、150mm）及稳焰器不同位置（0mm、10mm、20mm）对于速度及回流区等特性的影响，结果表明：在其他参数固定的条件下，随着锅炉负荷的降低，燃烧器内气体流速减小，流速最大值由140m/s减小到45m/s；回流区的长度及最大直径随负荷变化很小。在其他参数固定的条件下，稳焰器的尺寸越大，燃烧器内空气流速最大值越高，最大值最高约为160m/s，气体流动的扩散程度减小，收缩程度加大；稳焰器的尺寸加大，回流区长度由390mm增大到480mm，但回流区最大直径减小，由215mm减小到195mm，这表明回流区长度与稳焰器尺寸成正比，回流区最大直径与稳焰器尺寸成反比。对于带有小孔的稳焰器，存在小孔倒流现象，随着稳焰器尺寸增大，小孔倒流现象减弱，在实际应用中应选择合适口径燃烧器，避免该现象发生，降低稳焰器小孔因高温烟气回流而结焦的可能性。随着稳焰器出口平面到喷油器出口截面距离加大，燃烧器内空气流速最大值几乎不变，回流区长度及最大直径微弱增大。

A three-dimensional model of a swirl burner with small holes and a flame stabilizer was established. Fluent software was used to analyze the effects of boiler load (100%, 50%, 30%), flame stabilizer structural dimensions (100mm, 120mm, 150mm), and position (0mm, 10mm, 20mm) on the cold flow field of the pressurized swirl burner using the Realizable k -εmodel. The results showed that under fixed parameters, as the boiler load decreased, the gas flow velocity inside the burner decreased, and the maximum flow velocity decreased from 140m/s to 45m/s; The length and maximum diameter of the reflux zone vary very little with the load. Under other fixed parameters, the larger the size of the flame stabilizer, the higher the maximum air flow velocity inside the burner, with a maximum value of about 160m/s. The diffusion degree of gas flow decreases and the contraction degree increases; The size of the flame stabilizer has increased, and the length of the reflux zone has increased from 390mm to 480mm, but the maximum diameter of the reflux zone has decreased from 215mm to 195mm. This indicates that the length of the reflux zone is proportional to the size of the flame stabilizer, and the maximum diameter of the reflux zone is inversely proportional to the size of the flame stabilizer. For flame stabilizers with small holes, there is a phenomenon of small hole backflow. As the size of the flame stabilizer increases, the phenomenon of small hole backflow weakens. In practical applications, a suitable diameter burner should be selected to avoid this phenomenon and reduce the possibility of coking of the small holes of the flame stabilizer due to high-temperature flue gas backflow. As the distance from the outlet plane of the flame stabilizer to the outlet section of the fuel injector increases, the maximum air flow velocity inside the burner remains almost unchanged, while the length and maximum diameter of the recirculation zone slightly increase.