Research on Simulation and Performance Optimization of Mach 4 Civil Aircraft Propulsion Concept

Table 10

Turbofan mode optimization scheme.

Take-off operating point	Before optimization	After optimization
Flight altitude (km)	0	0
Flight Mach	0	0
Thrust (kN)	241.8	240.3
SFC (kg/daN/h)	0.82	0.817
Bypass ratio	1.24	1.4
Air mass flow (kg/s)	556	570
Outlet temperature of the main combustion chamber (K)	1545	1557
Exhaust velocity (m/s)	425.6	412
Noise level (EPNdB)	102.95	102.43
EINOx (g/kg)	6.37	5.47