“…Now, using , where is the ideal change in fluid specific enthalpy which, for a conservative system, is equal to the work done by the compressor rotor, it follows from (7) that (8) The energy delivered to the fluid by the compressor is given by (9) where is the angular velocity of the compressor spool and (10) where , correspond to incidence and frictional losses at the inducer and diffuser, respectively. For details see [21].…”