. The steam-engine and other heat-motors . Condenser or-^ Exhaust Pressure LostSteam Velocity Condenser orExhaust Pressure Fig. 248.—Diagrammatic Sketch of Parsons SUPERHEATED STEAM AND STEAM-TURBINES. 473 ing materially from the lunes of the Curtis type, and hence is easily recognized. The outlet-opening between two buckets of a rotating vanebeing smaller than the inlet opening, compels the steam to expandand accelerate its motion, since a constant mass must pass betweenthe vanes. Force is required to produce this acceleration, andthis force produces a reaction which acts in the dir
. The steam-engine and other heat-motors . Condenser or-^ Exhaust Pressure LostSteam Velocity Condenser orExhaust Pressure Fig. 248.—Diagrammatic Sketch of Parsons SUPERHEATED STEAM AND STEAM-TURBINES. 473 ing materially from the lunes of the Curtis type, and hence is easily recognized. The outlet-opening between two buckets of a rotating vanebeing smaller than the inlet opening, compels the steam to expandand accelerate its motion, since a constant mass must pass betweenthe vanes. Force is required to produce this acceleration, andthis force produces a reaction which acts in the direction of therotating vane. Therefore the steam acts by impulse on the enter-ing face of the vane and by reaction on the leaving face. In the De Laval turbine we noted that the wheel revolved inlow-pressure steam, and that the pressure was nearly the same onboth sides of the wheel. The Parsons turbine-vanes revolve inhigh-pressure steam, and the pressures are unequal and must bebalanced either by balancing pistons or by an opposing general construction of the Parsons turbine is shown in thecross-section, Fig. 249. Clearance is objectionable, but often una
Size: 1225px × 2041px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookpublisheretcetc, booksubject
