On which of the fundamental principle a jet engine works?

Explanation:

A jet engine is a type of reaction engine discharging a fast-moving jet that generates thrust by jet propulsion.

• It works on the principle of conservation of linear momentum.
• The reaction principle accelerates a mass in one direction and as we know that from Newton's third law of motion it will experience a reaction and hence it results in thrust in the opposite direction.

Working of Jet engine:

1. Air is drawn into the system through a set of valves, and fuel is sprayed into the incoming air.
2. Combustion occurs and pressure is built up in the closed combustion region, closing the inlet valves and then accelerating the column of gas in the tailpipe outward.
3. The escape of gases in exhaust permits the combustion gases to expand and the inertia of the out moving column of gases leaving the system lowers the pressure in the combustion chamber, allowing a fresh charge to enter through the inlet valve and repeat the cycle.