蒸気タービンの低負荷運転における低圧最終動翼内逆流現象の三次元数値解析 : 流体工学,流体機械

概要

論文の詳細を見る
Reverse flow which occurs in a low pressure steam turbine rotor under the low load operation was analyzed by the three-dimensional turbulent flow computation. The computed flow angles at the inlet and exit of the rotor agreed well with the experimental results in the scale-model turbine and also with the results based on the quasi 3-D inviscid flow analysis. It is clearly shown that the spiral-type vortex appears due to the reverse flow at the rotor root, and in addition, the leading-edge separation occurs on the pressure surface over the rotor blade height, especially a large separation occurs at the root side due to a high incidence angle. The present study suggests that the unstable flow might be caused by the spiral-type vortex and the leading-edge separation under lower load operations.
社団法人日本機械学会の論文
2001-08-25