How exactly does a gas turbine engine produce thrust?

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SUMMARY

The thrust produced by a gas turbine engine is primarily defined by the change in momentum of the exhaust fluid, calculated using the formula mass flow rate multiplied by the difference between jet velocity and intake velocity, plus the pressure difference across the nozzle. The thrust is transmitted to the engine mounts through the rotor and stator blades of the compressor and turbine, which experience forces that are transferred to the engine casing via thrust bearings. The nozzle's role is to optimize the pressure and velocity of the exhaust, thereby enhancing thrust, particularly when afterburners are employed to increase exhaust velocity. Overall, the compressor is the main component generating forward thrust, while other components primarily create drag.

PREREQUISITES
  • Understanding of gas turbine engine components (compressor, turbine, nozzle)
  • Familiarity with fluid dynamics principles (momentum change, pressure differentials)
  • Knowledge of thrust calculation methods (mass flow rate, velocity changes)
  • Basic thermodynamics related to combustion processes and afterburners
NEXT STEPS
  • Research the mechanics of gas turbine engine components and their interactions
  • Study the principles of fluid dynamics as applied to jet propulsion systems
  • Learn about the design and function of afterburners in enhancing thrust
  • Explore advanced thrust calculation methods and modeling techniques used in jet engine design
USEFUL FOR

Aerospace engineers, mechanical engineers, students studying propulsion systems, and anyone interested in the mechanics of gas turbine engines and thrust generation.

  • #61
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  • #62
Groobler said:
How depressing (but not surprising) that after all these posts only one person managed to understand the question, let alone answer it!
Isn't it kind of late to be whinging about the replies to a four-year-old question? :smile:

(oops, I missed Dale's post.)
 
  • #63
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