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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

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jet engines engine review

Jet EnginesEngine Review

Back to School – Spring Break is Over!

slide2
Overview

Basic Engines

Scientific Terms

Reciprocating Engines

Laws of Physics

Jet Engines

How Jet Engines Operate

Types of Jet Engines

Reversers and Suppressors

slide3
FLIGHT POWER
  • Objectives
    • Understand Functions in the Jet Engine Basic Sections
    • Know Gas Turbine Engine Basic System Parts
slide5
Jet Engines
  • Suspicion at first
  • Acceptance
slide6
How Jet Engines Operate
  • Compared to reciprocating engines,

the theoretical workings of the jet

engine are simple.

slide7
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
slide8
Advantages of Turbine Engines
    • Vibration stress is relieved
    • Engine is simpler
    • Coolingis less complicated
    • Disadvantages of Turbine Engines
    • High fuel consumption
    • Poor performance at low-power

setting, low speeds and low altitudes

slide9
Thrust
  • Power of a jet engine is expressed in pounds of thrust

Thrust = Weight of air x acceleration

slide11
Turbojet Engines
    • Parts of Turbojet Engines
  • Intake
  • Compressor
  • Combustion Chamber

Compressor

Intake

Combustor

slide13
Turbojet Engines
    • Parts of Turbojet Engines
  • Turbine Section
  • Exhaust Section
    • Afterburner
    • Nozzle

Turbine

Nozzle

Augmentor

slide16
Summary

Basic Engines

Scientific Terms

Reciprocating Engines

Laws of Physics

Jet Engines

How Jet Engines Operate

Types of Jet Engines

Reversers and Suppressors

slide17
Types of Jet Engines
  • Ramjet Engines
  • Turbo Fan
  • Turbo Prop
  • Turbo Shaft
slide18
Types of Jet Engines
  • Ramjet Engines
      • Simplest Jet Engine
      • Contains 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
slide19
Turbojet Engines
    • Types of Turbojet Engines

Axial-Flow Engine

Centrifugal-Flow Engine

slide20
Turbofan Engines
    • Becoming the dominant engine
    • Fuel-efficient
    • 4X amount of Air pulled in
slide21
Turboprop Engines
    • Combines the best features of
    • turbojet and propeller aircraft
    • Efficient at low altitudes and slow speeds
slide22
TurboshaftEngines
    • For use in Helicopters
slide24
How Jet Engines Operate

http://www.grc.nasa.gov/WWW/K-12/airplane/turbparts.html

slide25
Turbine Engines - Summary
  • Uses the force of hot flowing gases

striking a turbine to produce thrust

Know the four basic types

Know the parts

Know what and afterburner is:

fuel injected into exhaust under

pressure – velocity increased

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