Week 18 (Q&A) Flashcards
What is a Divergent duct’s shape & what does it do?
Velocity Decreases, Pressure Increases
IN A TURBINE ENG, WHAT IS A COMMON TERM APPLIED TO A DIVERGENT DUCT?
Diffuser
What is a Convergent duct’s shape & what does it do?
Increase Velocity, Decrease Pressure
Which component on a turbine eng is typically a Convergent duct?
Exhaust Nozzle
Define Bernoulli’s Principle
‘The sum of the static and dynamic pressures will always be equal’ (Increase Velocity, Decrease Pressure)
4 events to support combustion occur constantly & simultaneously and referred to as a Constant Pressure Cycle.
Brayton Cycle
is defined as a single rotating unit with a compressor and turbine attached at opposite ends of a shaft.
Spool/Rotor
Rotors are typically referred to as
N1, N2, N3
What is Engine Pressure Ratio (E.P.R.) ?
measures engine thrust output by comparing the pressure at the front to the pressure back of the engine.
REFERS TO THE LP (LOW PRESS) ROTOR.
N1
REFERS TO THE HP ROTOR (HI PRESS) IN A 2-SPOOL ENGINE.
N2
5 primary areas within a turbine engine, front to back.
INTAKE-COMPRESSOR-COMBUSTION-TURBINE-EXHAUST
A CONFIGURATION WHERE A PROPELLOR IS DRIVEN BY A TURBINE ENGINE.
Turboprop Engine
It increases the static pressure from the inlet duct and directs it to the combustion chamber at the correct pressure, velocity and temp (Rotor and Stator)
Axial Compressor Stage
converts the kinetic and heat energy of the combustion gases into mechanical energy to rotate the Turbine to drive the fan/propeller/compressors/accessories. (Stator and Rotor)
Axial Turbine Stage
