How does a ramjet engine work?

By Ritesh|Updated : September 3rd, 2022

A ramjet engine works when air moves through the combustion chamber of the engine at subsonic speeds. The engine's forward motion is used to compress the entering air. The ramjet's seeming simplicity is deceiving; creating one requires advanced aeronautical engineering, contemporary materials, and precision manufacturing.

Ramjet Engine Functioning

  • Ramjets breathe air, in contrast to their primary rival for speed, the rocket, which burns fuel using internal oxidizers such as ammonium nitrate, potassium chlorate, or ammonium chlorate.
  • Ramjets must go through the atmosphere, in contrast to rockets, which may operate in the almost vacuum of space.
  • Ramjets work by harnessing ram pressure, the natural air compression brought on by an aircraft's high speed.
  • Hence they must operate at very high speeds, around Mach 2.5 -- 3.0, or three times the speed of sound.
  • As a result, they rely on other vehicles or booster rockets to accelerate them. Hybrid engines are primarily used in standalone ramjet aircraft.
  • The controlled explosions power jets.
  • That may seem odd until most automobile engines operate similarly: Air is drawn in, compressed, combined with fuel, ignited, and then the piston gets pushed!
  • Use continuous combustion, in which fuel and air are continuously mixed and burned, in contrast to the cyclical or intermittent combustion that occurs in gasoline and diesel engines.


How does a ramjet engine work?

A Ramjet engine's combustion chamber has air moving through it at subsonic speeds. Ramjets are more effective than rockets across long distances, but they have a severe drawback: they are worthless at low speeds.


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