Download - Jet Engines Engine Review
Jet EnginesEngine Review
Back to School – Spring Break is Over!
OverviewBasic Engines
Scientific Terms
Reciprocating Engines
Laws of Physics
Jet Engines
How Jet Engines Operate
Types of Jet Engines
Reversers and Suppressors
FLIGHT POWER
Objectives• Understand Functions in the Jet
Engine Basic Sections• Know Gas Turbine Engine Basic
System Parts
Gas Turbine Engines
Jet Engines Suspicion at first
Acceptance
How Jet Engines Operate
Compared to reciprocating engines, the theoretical workings of the jet engine are simple.
Turbojet Engines Most widely used jet engine in the world Same basic operational sequence Air enters through the intake section Goes through the mechanical compressor Forced into the combustion chamber, mixes with fuel, and burns Escapes out through the exhaust nozzle = THRUST
Advantages of Turbine Engines Vibration stress is relieved Engine is simpler Cooling is less complicated
Disadvantages of Turbine Engines High fuel consumption Poor performance at low-power setting, low speeds and low altitudes
ThrustPower of a jet engine is expressed
in pounds of thrust
Thrust = Weight of air x acceleration
How Jet Engines Operate
Turbojet Engines Parts of Turbojet Engines
IntakeCompressor Combustion Chamber
Compressor
Intake Combustor
How Jet Engines OperateCompressor
Turbojet Engines Parts of Turbojet Engines
Turbine Section Exhaust Section
AfterburnerNozzle Turbine Nozzle
Augmentor
How Jet Engines OperateTurbine
How Jet Engines Operate
SummaryBasic Engines
Scientific Terms
Reciprocating Engines
Laws of Physics
Jet Engines
How Jet Engines Operate
Types of Jet Engines
Reversers and Suppressors
•Ramjet Engines
•Turbo Fan
•Turbo Prop
•Turbo Shaft
Types of Jet Engines
Ramjet Engines Simplest Jet EngineContains no moving parts Fuel is injected into the airstream and is
ignited by a spark
Will not function until enough air is coming through the intake to create a high- pressure flow
Theoretically has no maximum speed
Types of Jet Engines
Turbojet Engines Types of Turbojet Engines
Centrifugal-Flow Engine
Axial-Flow Engine
Turbofan Engines Becoming the dominant engineFuel-efficient4X amount of Air pulled in
Turboprop Engines• Combines the best features of
turbojet and propeller aircraft• Efficient at low altitudes and slow speeds
Turboshaft Engines For use in Helicopters
How Jet Engines Operate
How Jet Engines Operate
http://www.grc.nasa.gov/WWW/K-12/airplane/turbparts.html
Uses the force of hot flowing gases striking a turbine to produce thrustKnow the four basic typesKnow the partsKnow what and afterburner is:
fuel injected into exhaust under pressure – velocity increased
Turbine Engines - Summary