Basic Principle Flashcards
(17 cards)
In a gas turbine engine, an ungeared fan has the same RPM as?
The low pressure compressor
In a gas turbine engine, the highest gas temperature is reached within the?
Combustion Chamher
By-pass ration in a turbine engine is the ratio of the?
Cold air mass flow to the hot air mass flow.
The greatest risk created by a free turbine overspeed is?
Bursting of the free turbine disk
During take-off, the fan in a high by-pass ratio turbofan engine produces?
The greater part of the thrust.
In a multi-spool turbofan engine, the fan is driven by?
The rearmost turbine.
Assuming the jet pipe is not choked, the equation to calculate jet engine thrust T (with mass flow m, airspeed Vv and jet velocity Vj) is?
T = m(Vj - Vv)
Jet engine total efficiency indicates the efficiency at which?
Chemical power in the fuel is transformed into propulsive power (lT x V)
The maximum temperature in a gas turbine engine is limited by the temperature at the?
Turbine.
In a single spool gas turbine engine, the compressor rpm is the same as?
Turbine rpm.
For a fan jet engine, the by-pass ratio is the?
Cold air mass flow divided by the hot air mass flow.
The fan stage of a ducted-fan turbine engine is driven by the?
Low-pressure turbine
With regard to a jet aeroplane, specific range is the?
Nautical air miles flown per unit mass of fuel
Specific fuel consumption for a turbo-prop engine can be expressed in kg per?
Hour per unit of shaft power.
In a theoretical gas turbine cycle, combustion takes place at constant?
Pressure
In a gas turbine engine, the maximum gas temperature is attained?
Within the combustion chamber.
By-pass ration in a turbine engine is the ratio of the?
By-pass air mass flow to the HP air mass flow
