Where is the highest gas pressure in a turbojet engine quizlet?
B— direct the flow of gases parallel to the vertical line of the turbine blades. C— increase the velocity of the heated gases flowing past this point. The highest gas pressure in a turbojet engine occurs at the outlet of the compressor. The compressor outlet is the same as the entrance of the burner section.
Where is the highest heat to metal contact in a turbine engine?
The turbine inlet nozzle vanes are located directly aft of the combustion chambers and immediately forward of the turbine wheel. This is the highest or hottest temperature that comes in contact with metal components in the engine.
Can turbofans go supersonic?
Turbofans can tolerate supersonic speeds because the intake creates constant flow conditions irrespective of flight speed. Efficiency for propellers and fan blades is highest at subsonic flow conditions.
Why is a turbofan better than a turbojet?
Low-bypass-ratio turbofans are more fuel efficient than the basic turbojet. A turbofan generates more thrust for nearly an equal amount of fuel used by the core because the fuel flow rate is changed by slightly when adding the fan. As a result, the turbofan offers high fuel efficiency.
What is the proper starting sequence for a turbojet engine?
65. What is the proper starting sequence for a turbojet engine? a. Ignition, starter, fuel.
Why does the pressure drop slightly or remain constant in the combustion section of a turbine engine?
Why does the pressure drop slightly or remain constant in the combustion section of a turbine engine? The air moves¹ in direction of decreasing pressure except where forced by the compressor. So the pressure must be decreasing to maintain desired flow. … If the pressure was constant, it would keep moving.
What is meant by axial-flow?
: having the fluid or gas flowing parallel to the axis axial-flow turbine axial-flow pump — compare radial-flow.
What are some things inside a turbine engine to provide positive air flow?
Therefore, in order to give a positive flow the air must surround the engine compressor at a positive pressure before entering the compressor.
- Cabin pressurization, heating, and cooling.
- Pneumatic starting of engines.
- Auxiliary drive units.
- Control-booster servosystems.
- Power for running instruments.