Jet Exhaust Nozzle
Jump to navigation
Jump to search
Jet Exhaust Nozzle[edit | edit source]
A jet exhaust nozzle is a specially shaped tube at the rear of a jet engine that accelerates the exhaust gases, converting them into a high-velocity jet that produces thrust.
Function[edit | edit source]
The primary function of a jet exhaust nozzle is to:
- Generate thrust: By accelerating the exhaust gases, the nozzle creates the force needed to propel the aircraft forward.
- Conduct exhaust gases: The nozzle directs the exhaust gases to the free stream, ensuring they are expelled efficiently.
- Set mass flow rate: The nozzle's design and area determine the amount of exhaust gases that flow through the engine, which in turn affects the overall thrust.
Location[edit | edit source]
The nozzle is located downstream of the power turbine, the final stage of the jet engine.
Design[edit | edit source]
- Nozzles come in various shapes and sizes depending on the type of engine and the aircraft's mission.
- Simple turbojets and turboprops often use fixed geometry convergent nozzles.
- Turbofan engines may use co-annular nozzles, where the core flow exits the center nozzle and the fan flow exits the annular nozzle.
- Afterburning turbojets and turbofans require variable geometry convergent-divergent (CD) nozzles.
Materials[edit | edit source]
Aircraft exhaust nozzles are typically made of heat-resistant materials like titanium, which can withstand the high temperatures and pressures of the exhaust gases.