Pulsed Detonation Engines (PDEs) are a type of propulsion system that relies on the detonation of fuel-air mixtures to generate thrust. These engines operate by initiating detonations in a cyclical or pulsed manner, producing high-speed exhaust gases.
In a Pulsed Detonation Engine, the mass flow rate of exhaust gases is influenced by the rate of detonation cycles and the combustion efficiency. The exhaust velocity is determined by the detonation characteristics, and the pressure of the exhaust gases is influenced by the combustion process.
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).