Jet Engines Engine Review

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Jet Engines Engine Review. Back to School – Spring Break is Over!. Overview. Basic Engines Scientific Terms Reciprocating Engines Laws of Physics Jet Engines How Jet Engines Operate Types of Jet Engines Reversers and Suppressors. FLIGHT POWER. Objectives - PowerPoint PPT Presentation

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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

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