The performance of a scramjet (supersonic combustion ramjet) engine is typically characterized by key parameters that assess its efficiency and effectiveness in generating thrust. Scramjet engines are designed for high-speed flight in the supersonic and hypersonic regimes. The performance of a scramjet engine can be evaluated using various metrics, including specific thrust, thermal efficiency, and overall thrust. Please note that scramjet engines are highly specialized and complex, and these simplified formulas may not capture all the nuances of their operation.
Specific Thrust (TS): The specific thrust (TS) is a measure of how much thrust is generated per unit of air mass flow rate, similar to other jet engines.
Formula for specific thrust (TS):
Where:
- TS is the specific thrust (in Newtons per kilogram per second, N/(kg/s)).
- T is the thrust generated by the engine (in Newtons, N).
- ṁ is the air mass flow rate (in kilograms per second, kg/s).