The Steam Injector
A theoretical and practical treatise on the design and operation of injectors and on the flow of fluids through and the design of nozzles.
Forfatter: V. A. B. Hughes
År: 1912
Forlag: The Technical Publishing Company Limited
Sted: London
Sider: 145
UDK: 621.176
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118
THE STEAM INJECTOR.
(or throat) area of the steam inlet nozzle is less than the
effective (or tliroat) area of the delivery nozzle, so as to
ensure a very strong suction effect in the water supply
pipe. The forcing portion of the appliance is designed
solely as an injector; that is, with the effective ste-am
inlet area greater than the effective delivery area, so as to
give a jet of maximum velocity.
Fig. 66.
The quantity of water passed by the lifting portion of
the injector to the forcing portion varies with variations in
tlæ pressure of the steam entering the injector; hånd
regulation of the steam supply to suit the steam pressure
is therefore unnecessary.
To vary the quantity of water delivered by a compound
injector when the steam pressure remains constant, the
flow of steam to the lifting steam nozzle is controlled.