A Pressure-Fed Engine is a type of rocket engine where the propellants are forced into the combustion chamber using pressurized tanks. Pressure-fed engines are often used in small-scale rocket systems, where the simplicity of the feed system is advantageous. The pressure is usually provided by high-pressure gas stored in tanks, and the propellants are forced into the combustion chamber without the need for complex pumps.
The thrust equation for a turbojet engine using control volume analysis is expressed as:
where,
- is the thrust force,
- ṁe is the mass flow rate of exhaust gases in kilograms per second (kg/s).
- is the Exhaust velocity at the nozzle exit in meters per second (m/s).
- ṁ0 is the mass flow rate of inlet gases in kilograms per second (kg/s).
- is the Exhaust velocity at the nozzle Inlet in meters per second (m/s).
- is the Pressure at the nozzle exit in pascals (Pa).
- is the Pressure at the nozzle inlet in pascals (Pa).
- is the Area of the nozzle exit in square meters (m²).