| 摘要 |
PURPOSE:To contrive to reduce the impulsive fluid force and the decreasing of output during a partial load operation by a method wherein an introducing passage for a working fluid, a nozzle group and a moving blade are divided in radial direction on the axis of a turbine shaft. CONSTITUTION:An axial-flow turbine is composed of an introducing passage 100 for a working fluid, a nozzle group 200 and a moving blade 300. Those components are divided respectively in radial direction on the axis of a turbine shaft. During a partial load operation, the working fluid is introduced only through the first introducing passage 101 or the second introducing passage 102. Thereby, a uniform fluid force in circumferential direction is applied under the partial load operation, accordingly, an impulsive fluid force for a moving blade can be decreased. The leakage of the working fluid produced between the divided flow passages of the nozzle group 200 and the moving blade 300 can be decreased, consequently, the decreasing of output can be reduced. |
