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Beginner's
Guide to Propulsion
Turbine
Engine Identification
Activity
If so instructed
by your teacher, print out a worksheet page for these problems.
Before you begin:
- In this activity,
you will be using the Beginner's
Guide to Propulsion to identify parts and answer questions about
a basic jet engine. Prior to completing the activity locate the Propulsion
Index, and preview the slides listed under
Turbine Engine Parts
and
Engine Component Analysis.
Refer back to the information
in the slides to help you complete the questions given below.
- During World
War II, a new type of airplane engine was developed independently
in Germany and in England. This engine was called a gas turbine
engine; we normally call the engine a jet engine. Early jet engines
worked much like a rocket engine, creating a hot exhaust gas that
was passed through a nozzle to produce thrust. But unlike the rocket
engine, which must carry its oxygen for combustion, the turbine engine
gets its oxygen from the surrounding air. (A jet engine will not work
in outer space because there is no surrounding air.) For a gas turbine
engine, the accelerated gas is the jet exhaust ,and most of the mass
of the jet exhaust comes from the surrounding atmosphere. Most modern
passenger and military aircraft are powered by gas turbine engines,
engines that are very important for modern life.
Answer the following
questions:
- Use
the
Turbine Engine Parts
section located in the Propulsion
Index of the Beginner's Guide
to Propulsion to match the correct letter from above with the
listed part. Write the corresponding letter for each engine part in
the space to the right of the word.
Nozzle
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________
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Turbine
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________
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Compressor
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________
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Shaft
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________
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Burner
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________
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Inlet
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________
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- Answer the following
questions about
Turbine Engine Parts
and
Engine Component Analysis
using the Beginner's
Guide to Propulsion.
- Why is the inlet
lip of a supersonic airplane's engine sharper than the inlet lip of
a subsonic airplane?
- What is the purpose
of the central cone in the "Axisymetric Supersonic" engine?
- What is the purpose
of the stators in the compressor?
- What is the advantage
of having a rectangular nozzle on a jet engine?
- What is "spillage
drag"?
- What is meant
by "distortion" in reference to inlet performance?
- What
is the difference between an axial compressor and a centrifugal compressor?
- Why
did designers change from centrifugal compressors to axial compressors?
- At
what point in the turbojet engine is the pressure the highest?
- How does the
nozzle produce thrust?
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Related Pages:
Standards
Worksheet
Propulsion Activity Index
Propulsion Index
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