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What is the purpose of diffuser section in a turbine engine?
Diffuser is one key component of the gas turbine combustor following the compressor. Its primary function is to slow down the air flow delivered by the compressor in order to promote efficient combustion and avoid large total pressure losses.
In what part of the jet engine does thrust occur?
The reaction of the expanded gas—the mixture of fuel and air—being forced through the turbine, drives the fan and compressor and blows out of the exhaust nozzle providing the thrust.
What is the diffuser section of a jet engine?
Diffuser section: – The diffuser slows down the compressor delivery air to reduce flow losses in the combustor. Slower air is also required to help stabilize the combustion flame and the higher static pressure improves the combustion efficiency.
What is the turbine section of a jet engine?
Turbine: The turbine section is another series of rotating blades that are driven by high-pressure air leaving the combustor. The turbine blades catch the rapid airflow, and rotate to drive a spinning shaft that turns the fan and compressor at the front of the engine.
What is the diffuser function of a turbine engine?
Turbine Engine Diffuser The diffuser is the divergent section of the engine after the compressor and before the combustion section. It has the all-important function of reducing high-velocity compressor discharge air to increased pressure at a slower velocity.
What causes the jet engine to thrust forward?
As the jets of gas shoot backward, the engine and the aircraft are thrust forward. As the hot air is going to the nozzle, it passes through another group of blades called the turbine. The turbine is attached to the same shaft as the compressor. Spinning the turbine causes the compressor to spin.
Why does combustion produce drag rather than thrust?
With the *’s indicating the location of combustion one would expect it to generate drag rather than thrust. The expanding gases produced by combustion would push against the narrowing sides of the engine and create a backward force on the plane. To produce net thrust does the inlet have to be narrower than the outlet or what?
Why does a small exhaust jet produce less drag?
At that point you have an ‘engine’ with a small exhaust jet and a very large drag, and it wouldn’t produce a net thrust. In fact it would produce less overall drag if the combustion is stopped as a larger (denser) mass of air would fit through the inlet and so less air would need to be pushed around the engine.