Flashcards in Final Deck (59)
What type of engines have combustion occur MOMENTARILY in a CYLINDRICAL flow?
(Intake, Compression, COMBUSTION, Exhaust)
What type of engines have combustion occur CONTINUOUSLY in ONE location?
What are the 4 engine sections?
1. Fan (Intake)
4. Turbine (Exhaust)
Newton's 2nd Law
F = ma
Increasing temperature causes gas to:
A ____ accelerates gas flow at the trailing edge of the turbine
A ____ decelerates streamlines in conventional air intake design
What are the 4 different types of Turbo engines?
Turbo___ engine are most commonly used for helicopters
Turbo___ engines are knows to be the noisiest
Turbo___ engines have better fuel consumption and reduced noise (80 percent bypass/20 percent core air)
Turbo___ engines are prop-driven through a reduction gearbox from a turbine.
The Pratt and Whitney Purepower 1000 is what TYPE of turbine engine?
The ___ is designed to ensure smooth, stable airflow delivered to the compressor.
With regards to a Compressor, what does the term "Stage" refer to?
Stage = One set of rotors and stators within an axial flow compressor
Compressor EFFICIENCY is concerned with:
The amount of energy supplied from the turbine, via a shaft to the compressor resulting in an increase in pressure energy
____ are a collection of blades oriented around one cylindrical plane which rotates on the compressor shaft (driven by the turbine).
____ are blades mounted to the compressors CASING
(Stators STAY, they do not move)
The ________ refers to the Amount of air routed around the compressor, versus the amount of air routed through the compressor/combustor
High-Bypass ratio engines have a ratio greater than __
The air flow rate is the:
Volume of air able to be processed by the compressor (typically in 1 second)
What are the 2 TYPES of compressors?
1. Centrifugal Flow
2. Axial Flow
What type of compressor is most commonly used today?
Axial Flow Compressor
A(n) ____ flow compressor is able to accept large mass flow rates, and deliver high pressure ratios!
Can Axial Flow compressors be divided into multi-stage/multi-spool? What are 2 downsides of Axial Flow compressors?
- Weight and Complexity (multiple stages/spools)
What are the 2 main types of COMBUSTION chambers?
1. Can-Type (inefficient, no longer used)
______ are distributed as necessary to provide fuel mist into the combustor
_____ operate as needed, and assist with starting, auto-continuous ignition, and manual-continuous ignition
What is the purpose of a Turbine?
- To extract/absorb energy, and convert it from gas flow, into mechanical shaft power/torque