Podcast
Questions and Answers
The force that the gasturbine excerts on the air flowing through is ... (1) the force that the air excerts on the gasturbine, and points towards the ... (2) of the aircraft.
The force that the gasturbine excerts on the air flowing through is ... (1) the force that the air excerts on the gasturbine, and points towards the ... (2) of the aircraft.
- (1) equal to; (2) nose
- (1) equal to; (2) tail (correct)
- (1) larger than; (2) nose
- (1) larger than; (2) tail
The propulsive efficiency is the ratio between the power absorbed by (1) ... and the power delivered by the (2) ... .
The propulsive efficiency is the ratio between the power absorbed by (1) ... and the power delivered by the (2) ... .
- (1) airflow; (2) fuel
- (1) airflow; (2) engine
- (1) airplane; (2) fuel
- (1) airplane; (2) engine (correct)
What stays the same in a closed system ?
What stays the same in a closed system ?
- Enthalpy
- Entropy
- Internal energy
- Mass (correct)
What processes take place in the Carnot-cycle of a Stirling engine ?
What processes take place in the Carnot-cycle of a Stirling engine ?
The main advantages of a jet engine over a reciprocating engine are related to the:
The main advantages of a jet engine over a reciprocating engine are related to the:
How does the First Law look like, when applied to the turbine of a gasturbine ?
How does the First Law look like, when applied to the turbine of a gasturbine ?
Friction losses result in ... (1) of the ... (2) of a gas.
Friction losses result in ... (1) of the ... (2) of a gas.
The purpose of flat-rated thrust is to:
The purpose of flat-rated thrust is to:
Due to the decreasing blade length at the end of the compressor, we can also reduce the cross-section of the compressor. This can be done either by increasing the diameter of the shaft, or by decreasing the diameter of the casing of the compressor. What are two benefits of the increase of the diameter of the shaft ?
Due to the decreasing blade length at the end of the compressor, we can also reduce the cross-section of the compressor. This can be done either by increasing the diameter of the shaft, or by decreasing the diameter of the casing of the compressor. What are two benefits of the increase of the diameter of the shaft ?
What conclusion can you draw if the degree of reaction of a stage increases ?
What conclusion can you draw if the degree of reaction of a stage increases ?
The goal of the VSVs is to prevent:
The goal of the VSVs is to prevent:
The blade profiles shown are from of the (1) ... of (2) ... turbine.
The blade profiles shown are from of the (1) ... of (2) ... turbine.
A stoichiometric mixture contains ... combustion takes place.
A stoichiometric mixture contains ... combustion takes place.
A flow divider in a combustion chamber is used to:
A flow divider in a combustion chamber is used to:
I The starting engine of a twin-spool turbofan is connected to the N2-shaft
II The starting engine drives the gas turbine by delivering air under pressure to the gas turbine
I The starting engine of a twin-spool turbofan is connected to the N2-shaft II The starting engine drives the gas turbine by delivering air under pressure to the gas turbine
What line represents the fastest deceleration from Y to X ?
What line represents the fastest deceleration from Y to X ?
A fuel metering graph is given at sea level:
If we fly at 10 km altitude (where a significantly lower temperature prevails) then the equilibrium line moves to the (1)...; the prohibited areas related to a too high fuel-air ratio move (2) ...; and the prohibited areas related to a too low fuel-air ratio move (3) ...
A fuel metering graph is given at sea level: If we fly at 10 km altitude (where a significantly lower temperature prevails) then the equilibrium line moves to the (1)...; the prohibited areas related to a too high fuel-air ratio move (2) ...; and the prohibited areas related to a too low fuel-air ratio move (3) ...
In what order were the following systems for fuel metering developed ?
In what order were the following systems for fuel metering developed ?
One has switched from controlling N2 to controlling N1 because the N1-shaft:
One has switched from controlling N2 to controlling N1 because the N1-shaft:
What does FADEC do if both systems of the ECU give error messages?
What does FADEC do if both systems of the ECU give error messages?
With the increase of the velocity of the air and the mass flow of the air in an unchoked turbojet the ... can be determined.
I. thrust
II. propulsive efficiency
With the increase of the velocity of the air and the mass flow of the air in an unchoked turbojet the ... can be determined. I. thrust II. propulsive efficiency
In each cylinder the gas is in a different phase of the Otto-cycle. When the gas in cylinder number 4 has just been ignited and is expanding, in cylinder number 1 the gas:
In each cylinder the gas is in a different phase of the Otto-cycle. When the gas in cylinder number 4 has just been ignited and is expanding, in cylinder number 1 the gas:
In a reciprocating engine the pressure of the gas is increased by compressing the gas in the piston VERY quickly. Hereby:
In a reciprocating engine the pressure of the gas is increased by compressing the gas in the piston VERY quickly. Hereby:
A ... has the acceleration of the gas flow as its ONLY source of propulsion.
A ... has the acceleration of the gas flow as its ONLY source of propulsion.
If the TAS increases, the total efficiency ... (1) because of a change in the ... (2) efficiency.
If the TAS increases, the total efficiency ... (1) because of a change in the ... (2) efficiency.
The critical pressure increases with the ... of the outlet.
The critical pressure increases with the ... of the outlet.
Why does increasing the TIT have a favourable effect on the specific thrust?
Why does increasing the TIT have a favourable effect on the specific thrust?
To determine the pressure difference, in the rotor you look for the change of the (1) ... velocity, and in the stator for the change of the (2) ... velocity.
To determine the pressure difference, in the rotor you look for the change of the (1) ... velocity, and in the stator for the change of the (2) ... velocity.
We talk about choke when ... occurs.
We talk about choke when ... occurs.
Compared to a turbine blade a compressor blade has a:
Compared to a turbine blade a compressor blade has a:
With impingement cooling air:
With impingement cooling air:
To the combustion chamber a surplus of air is fed. What is NOT a function of this surplus of air?
To the combustion chamber a surplus of air is fed. What is NOT a function of this surplus of air?
What type of combustion chamber is the LEAST suitable for connection to a centrifugal compressor ?
What type of combustion chamber is the LEAST suitable for connection to a centrifugal compressor ?
What is first parameter that begins to rise at the startup of the engine?
What is first parameter that begins to rise at the startup of the engine?
