How Jet Engines Work Answers

1. Use the Internet to find the function of the main parts of a jet engine and complete the table of jet engine parts shown below.
   (See http://www.grc.nasa.gov/WWW/K-12/airplane/turbparts.html ) 

   JET ENGINE PARTS	IMAGE OF PART	PART FUNCTION
   Fan		Accelerates air into the jet engine. Fans are used for efficiency.
   By-pass Duct		Air flows through the inlet through a duct and out the nozzle. The air leaves the engine at a higher velocity than when it entered. The passage through which the air travels is called the by-pass duct.
   Compressor		Consists of multiple rows of blades which turn and make the air denser.
   Combustor		The compressed air flows into the combustor where a spray of fuel is added and ignited.
   Turbine		The fast moving air causes the blades of the turbine to turn, generating energy which is used to power other parts of the engine.
   Nozzle		Air leaves the engine through the nozzle where exhause pressure is matched with atmospheric pressure.

    

2. Name the four main types of gas turbines (http://www.grc.nasa.gov/WWW/K-12/airplane/trbtyp.html) demonstrated below and give their functions.

   NAME OF ENGINE	DIAGRAM OF GAS TURBINE	MAIN APPLICATION OF ENGINE
   Turbojet		Airliners and military aircraft
   Turbo fan		Most common type used in civil and military aircraft
   Turbo prop		Military aircraft
   Turbo shaft		Helicopters, power and pumping stations, hovercraft, and ships

   Diagrams used in this table have the following Copyright (C) 1995, 1996, 1997 Allison Engine Company. All rights reserved
   
   

3. The reaction produced by a jet engine is based on Newton's Third law of motion.

    

    

4. Explain Newton's law of motion referred to in Question 3.

    For every action, there is an equal and opposite reaction.

    

    

5. Give two examples of applications of Newton's law of motion other than jet engines.

 Answers will vary. Examples: a bouncing ball or one marble striking another marble.