Turbines Flashcards
What is a turbine ?
Rotary engine that extracts energy from fluid flow and converts it into useful work
What is a steam turbine ?
Extracts thermal energy from pressurised steam, and converts it into rotary motion
What type of energy does moving fluid or gas contain?
Potential energy and Kinectic
What law does impulse turbines follow?
Newton’s second law
What law does reaction turbines follow?
Newton’s third law
How does an impulse turbine work
High velocity fluid or gas is directed at turbine blades or rotors
How does reaction turbines work?
Movement by reacting to the gas or fluids pressure of mass
What are the main functions of a jet engine control and safety system?
Protect for engine surge and over temperature
What are the advantages of a jet engine ?
Very high power to weight ratio
More size efficient
Moves in one direction
Fewer moving parts
What do blades have to withstand ?
Fatigue , high pressure and temperature, light and resistant to volcano dust
What is used to control a turbine ?
Governor
What are the 6 events of a jet engine ?
Air intake Compressor Fuel burner Combustion chamber Turbine Jet pipe and propelling nozzle
What law does jet propulsion use?
Newton’s third law
What type of turbine blade can be used which allows an increase in rotor inlet temperature?
Ceramic
Which basic principle does the steam engine operate on?
Heat / thermodynamics
