reduction of speed of incoming air and conversion of part of it into pressure energy

compression of inlet air

increasing speed of incoming air

lost work

closed cycle

open cycle

both of the above

closed/open depending on other con-siderations

h.p. compressor L connected to h.p. turbine and l.p. compressor ot l.p. tur-bine

h.p. compressor is connected to l.p. turbine and l.p. compressor is con-nected to h.p. turbine

both the arrangements can be employed

all are connected in series

mass

energy

flow

linear momentum

vacuum

atmospheric air

compressed air

oxygen alone