What principle is the basic concept for the gas turbine engine?

The basic concept for the gas turbine engine is jet propulsion. Gas turbine engines operate on the principle of converting fuel into energy through combustion, which generates high-temperature, high-velocity exhaust gases. These gases are expelled out of the engine, creating thrust based on Newton's third law of motion: for every action, there is an equal and opposite reaction. In the context of jet propulsion, the action is the high-speed exhaust gas being expelled, and the reaction results in the forward thrust that propels the aircraft.

Jet propulsion is fundamental to gas turbine engines, as it capitalizes on the rapid expansion of gases produced during combustion. This principle is crucial for the engine to operate efficiently and effectively, as it allows for the propulsion of aircraft at high speeds and altitudes.

In contrast, electromagnetic force focuses on the interaction between charged particles, mechanical advantage relates to the use of tools and machines to amplify force, and hydraulic pressure is about using liquid under pressure for movement and control. While these concepts have their own applications, they do not apply to the operational principles of gas turbine engines as jet propulsion does.