Steam turbines; a practical and theoretical treatise for engineers and students, including a discussion of the gas turbine . DrumRotor SECTION f W4 s *J *J w *s ^0 w *3# *dlP *\ W., ^ H B $ ? f|i SECTION B. Velocity Tnaugles Fig. 41. Diagrams of a Three-stage ReactionTurbine. STEAM TURBINE TYPES AND BLADE DESIGN 73 The Rateau turbine has from 8 to 15 pressure stages, with aset of nozzles and a single blade wheel for each. The drop inpressure is then, of course, comparatively small in each stage. REACTION TURBINES. The arrangement of blades in the well-known Parsons turbineis illustrated in Fig
Steam turbines; a practical and theoretical treatise for engineers and students, including a discussion of the gas turbine . DrumRotor SECTION f W4 s *J *J w *s ^0 w *3# *dlP *\ W., ^ H B $ ? f|i SECTION B. Velocity Tnaugles Fig. 41. Diagrams of a Three-stage ReactionTurbine. STEAM TURBINE TYPES AND BLADE DESIGN 73 The Rateau turbine has from 8 to 15 pressure stages, with aset of nozzles and a single blade wheel for each. The drop inpressure is then, of course, comparatively small in each stage. REACTION TURBINES. The arrangement of blades in the well-known Parsons turbineis illustrated in Fig. 41. This is the typical modern reaction tur-bine. There are no nozzles. The steam flows from the boilerinto the admission space of the turbine (see Section A)with practically no velocity. From this space it enters the first setof stationary blades, where it expands and attains some velocityas the pressure drops. Curves VII and VIII show the change ofvelocity with change of pressure. When the steam leaves the fixedblades it enters immediately the first set of moving blades. Hereit expands again; but at the same time some of the velocity fromthe expansion is taken away, or, in other words, the veloc
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