Steam Engines and Steam Turbines - Terms
Accelerated flow Type of flow that takes place in nozzles.The flow accelerates and pressure reduces. Air pump A reciprocating or centrifugal pump used to remove air, and sometimes the condensace from the condenser of a steam plant. Angle of advance The angle in excess of 90 degrees by which the eccentric throw of a steam engine valve gear is in advance of the crank. Allan Valve A steam engine slide valve in which a supplementary passage increases the steam supply to the port during admission to reduce wire drawing. Atmospheric engine An early form of steam engine in which a partial vacuum created by steam condensation allowed atmospheric pressure to drive down the piston. Axial discharge turbine A steam turbine in which the absolute velocity of stram flow at exit is a minimum . Axial flow turbine Steam turbine in which the general direction of steam flow has been roughly parallel to the turbine axis. Back pressure turbine A steam turbine from which the who...