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

Table 9

Ramjet mode optimization scheme at mode transition point.

	Before optimization	After optimization
Flight altitude (km)	20.9	20.9
Flight Mach	3	3
Thrust (kN)	151	157
SFC (kg/daN/h)	1.8	1.8
Air mass flow (kg/s)	318	318
(K)	1400 K	1425 K
Maximum area of (m^2)	2.3	2.4