以某型汽轮机末级静叶为研究对象，建立了叶栅单流道、空心叶片及其内部加热通道三维模型，基于ANSYS FLUENT软件瞬态离散相模型（DPM）分析了在不同的机组工况下液滴尺寸、进汽角度对沉积的影响，并对比了静叶内部传统通道与蛇形通道的传热特性。结果表明：液滴主要沉积在静叶压力面；在轴向上，压力面沉积集中在静叶前缘和70 %-90 %相对叶宽区域，吸力面沉积集中在距前缘前20 %相对叶宽的区域；在径向上，液滴主要沉积在叶片70%以上相对叶高区域；总沉积率随进汽参数降低逐渐减少，但吸力面沉积占比增加；随着进汽角增大，液滴沉积范围增大，总沉积率降低；在设计加热工况下，蛇形通道所得外壁面平均温度相较于传统通道提升约34K，外壁面高温区域也更靠近液滴沉积集中位置。该工作为后续空心静叶加热除湿结构设计提供仿真参考。

Taking the last stage stator blade of a steam turbine as the research object, a three-dimensional model of cascade single channel, hollow blade and internal heating channel was established. Based on the transient discrete phase model (DPM) of ANSYS FLUENT software, the influence of droplet size and steam inlet angle on deposition under different unit conditions was analyzed, and the heat transfer characteristics of traditional channel and serpentine channel in stator blade were compared. The results show that the droplets are mainly deposited on the pressure surface of the stator; In the axial direction, the pressure surface deposits are concentrated in the leading edge of the stator and the area with 70 %-90% relative blade width, and the suction surface deposits are concentrated in the area with 20% relative blade width before the leading edge. In the radial direction, the droplets are mainly deposited in the area above 70% of the relative leaf height of the blade; The total deposition rate decreases gradually with the decrease of steam inlet parameters, but the proportion of suction surface deposition increases; With the increase of steam inlet angle, the droplet deposition range increases and the total deposition rate decreases; Under the design heating condition, the average temperature of the outer wall of the serpentine channel is increased by about 34K compared with that of the traditional channel, and the high temperature area of the outer wall is closer to the concentration position of droplet deposition. This work provides a simulation reference for the subsequent design of hollow stator heating dehumidification structure.