Gas Turbine Engines: Expansion Away From Compressors

In summary, the conversation discusses the movement of gas in a gas turbine engine, specifically why it moves away from the compressor after expansion and the difference in pressure before and after combustion. It is explained that the gas moves backwards due to its dropping pressure and that the pressure is highest after compression and decreases as it moves towards the outlet nozzle.
  • #1
Mohankpvk
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In a gas turbine engine(in aircrafts), why doesn't the gas after expansion move backwards towards the compressor?
.How is it that it expands away from the compressor(rotating the turbine blades)?
Will the pressure of air at the end of the compressor before the combustion chamber be higher than the pressure after combustion(of the hot gas)?
 
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  • #2
Mohankpvk said:
In a gas turbine engine(in aircrafts), why doesn't the gas after expansion move backwards towards the compressor?
Its pressure is dropping (because it is expanding), so it has to move backwards.
How is it that it expands away from the compressor(rotating the turbine blades)?
Will the pressure of air at the end of the compressor before the combustion chamber be higher than the pressure after combustion(of the hot gas)?
The pressure is highest right after compression and drops as it goes toward the outlet nozzle.
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  • #3
russ_watters said:
Its pressure is dropping (because it is expanding), so it has to move backwards.

The pressure is highest right after compression and drops as it goes toward the outlet nozzle.
View attachment 228679
Nice answer.
 
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Related to Gas Turbine Engines: Expansion Away From Compressors

What is a gas turbine engine?

A gas turbine engine is a type of internal combustion engine that converts the energy from fuel combustion into mechanical energy to power an aircraft or other machinery. It is composed of a compressor, combustor, and turbine, which work together to produce thrust or mechanical power.

What is expansion away from compressors in a gas turbine engine?

Expansion away from compressors is a process in a gas turbine engine where the compressed air from the compressor is heated and expanded in the turbine, converting its energy into mechanical power. This expansion drives the turbine, which in turn drives the compressor and other engine components.

Why is expansion away from compressors important in a gas turbine engine?

Expansion away from compressors is important because it is the primary source of power in a gas turbine engine. It converts the energy from fuel combustion into mechanical power, which is used to drive the engine and generate thrust. Without this process, the engine would not function.

What are the components involved in expansion away from compressors?

The components involved in expansion away from compressors are the combustor, turbine, and nozzle. The combustor is where fuel is mixed with compressed air and ignited to produce hot gases. These gases then flow through the turbine, which is composed of blades that are turned by the force of the gases, converting their energy into mechanical power. The nozzle is the final component where the exhaust gases exit the engine.

What are the benefits of using a gas turbine engine with expansion away from compressors?

There are several benefits of using a gas turbine engine with expansion away from compressors. These include high power-to-weight ratio, efficient fuel consumption, low emissions, and high reliability. Additionally, gas turbine engines are compact, have fewer moving parts, and can operate at high altitudes. They are also more versatile and can be used in a variety of applications such as aircraft, power generation, and marine propulsion.

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