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Introduction to Jet Engines

Hey what is up folks, hope you all are doing well. So the wait is finally over. We are going to start with the first topic of our primary curriculum, JET ENGINES. With this blog, I want to introduce you all to the basics of jet engines. So without any further ado, let's get straight into it, shall we? 


The above picture is a cross-sectional diagram of a JET ENGINE also known as a GAS TURBINE ENGINE. A jet engine generates power in 4 stages:

  1. Induction: This is air being sucked into the engine through the air intake.
  2. Compression: This is air being compressed by the compressors to increase the pressure and decrease air volume.
  3. Combustion: The addition of fuel to the air creates an air-fuel mixture, burnt in the combustion chamber. This combustion causes a rise in volume at a constant pressure.
  4. Exhaust: In this stage, the hot gasses generated by combustion pass through the turbine. The hot gasses passing through the turbine make it rotate, which facilitates the rotation of the compressors. The presence of the turbine also reduces the temperature of the outgoing gasses through the exhaust nozzle.
Alright so now that we have discussed the 4 different stages by which a jet engine generates power lets talk about a few key aspects and properties of a jet engine.

  1. A jet engine follows a CONSTANT PRESSURE cycle, i.e. combustion in a jet engine theoretically occurs at a constant pressure. This constant pressure cycle is known as the BRAYTON CYCLE.
  2. The basic principle of a gas turbine engine is that it propels a mass of air backwards providing us with thrust. While a propeller-driven A/c pushes a LARGE mass of air backwards rather SLOWLY, a jet engine pushes a SMALL mass of air relatively QUICKLY.
  3. Jet engines follow NEWTON'S THIRD LAW. The law states for every action there is an equal and opposite reaction. In a jet engine, hot gasses are produced that flow out of the exhaust at the engine's back. In reaction to this, an opposite acting force is generated.
Alright, folks with that we will be concluding our intro to jet engines. Hope this has given all of you a clear idea of the topic we are about to dive in, until then keep dreaming big and this your Soaring Pilot signing off 🛫💖.

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