A zooming technology was implemented by combining aero-engine zero dimensional performance code and computational fluid dynamics (CFD) software for simulating two-dimensional nozzle inner/outer flow.The research was conducted based on Matlab with the incorporation of MS-DOS command and CFD operational log.To optimize the cruise performance of aircraft propulsion system and aircraft afterbody drag

the control schedule of aero-engine nozzle throat area and exit area was investigated.The results show that the installed thrust of aero-engine is improved over 1% in the flight condition of high Mach number only by optimizing the schedule of nozzle exit area

while maintaining the stability margin of aero-engine.