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In Reply to: RE: fullsized, working version would be way more interesting, though posted by tomservo on May 12, 2025 at 17:14:55:
Intake and Compression: The engine sucks in air at the front and compresses it. This requires energy input from the engine's turbines.
Combustion: Fuel is mixed with the compressed air and ignited in a combustion chamber. This process significantly increases the temperature and pressure of the gases.
Expansion and Exhaust: These hot, high-pressure gases then expand rapidly. The engine is designed with a narrower opening at the rear (the nozzle) compared to the front intake. This constriction forces the expanding gases to accelerate dramatically out the back.
Think of it like squeezing a balloon - the air rushes out the opening you create. In the jet engine, the nozzle acts as that opening.
Why not the front?
While there might not be a physical barrier blocking the front in a static museum display, the entire design of the engine is engineered to direct the flow rearward:
Turbine Blades: Behind the combustion chamber are turbine blades. These are specifically shaped to extract energy from the rapidly expanding gases, causing the turbines (and the compressor at the front) to spin. The angle and curvature of these blades are crucial for directing the airflow towards the rear.
Converging Nozzle: The narrowing shape of the rear nozzle is key to accelerating the exhaust gases. This acceleration is what generates thrust in the opposite direction, propelling the aircraft forward. If the gases were to exit freely from the front, this acceleration and the resulting thrust would be significantly reduced or non-existent.
So, while it might appear open at both ends in a non-operational engine, the internal components and the overall aerodynamic design are what dictate the direction of the powerful exhaust flow. The engine is meticulously designed to harness the energy of the combustion process and direct it rearward to create thrust.
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Follow Ups
- RE: fullsized, working version would be way more interesting, though - Leo loves music 17:58:00 05/12/25 (1)
- RE: fullsized, working version would be way more interesting, though - tomservo 06:53:38 05/13/25 (0)
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