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采用Fluent软件对某600 MW汽轮机末级静叶栅中的水滴三维运动与沉积规律进行了数值计算,确定了水滴在静叶轴向和径向的沉积位置;实验研究了空心叶栅缝隙抽吸的去湿性能。结果表明:静叶内弧上的沉积水量占叶栅进口总水量的12.2%,背弧的沉积水量占1.6%;静叶内弧上的缝隙抽吸水量大于背弧上的抽吸水量,缝隙位置越靠近静叶出口边,抽吸水量也越大;随着缝隙宽度的增大,缝隙抽吸水量先降低后增大,在宽度为3.0 mm左右时达到较低值;缝隙抽吸水量随抽吸压差的增大而增大,随着主气流速度的增大而很快减小。
Fluent software was used to calculate the three-dimensional movement and deposition regularity of water droplets in a final stator blade of a 600 MW steam turbine. The deposition position of water droplets in the stator vane in the axial and radial directions was determined. Dehumidifying performance. The results showed that the amount of water deposited on the inner arc of the stator blade accounted for 12.2% of the total water input of the blade and the amount of water deposited on the back arc accounted for 1.6%. The amount of sucked water on the inner arc of the stator blade was larger than the amount of sucked water on the back arc. The closer to the exit of the vane, the greater the amount of sucked water. With the increase of the slit width, the amount of sucking water in the slit first decreases and then increases, reaching a lower value when the width is about 3.0 mm. As suction pressure increases, it increases rapidly and decreases rapidly as the main gas velocity increases.