In the aerospace context, ignition refers to the process of starting the propulsion system of a rocket, missile or aircraft.
It is the point at which the fuel and oxidizer in the propulsion system are ignited, creating a controlled combustion reaction that generates thrust.
Examples of ignition in the aerospace context include:
-
Rocket ignition: In a rocket propulsion system, ignition occurs when the fuel and oxidizer are mixed and ignited in the combustion chamber. This creates the hot, high-pressure gases that are expelled through the nozzle, generating thrust.
-
Engine ignition: In an aircraft propulsion system, ignition occurs when the fuel and air are mixed and ignited in the combustion chamber of the engine. This creates the hot, high-pressure gases that are expelled through the nozzle, generating thrust.
-
Missile ignition: In a missile propulsion system, ignition occurs when the fuel and oxidizer are mixed and ignited in the combustion chamber of the rocket engine. This creates the hot, high-pressure gases that are expelled through the nozzle, generating thrust.
-
Ignition of solid propellant: Solid rocket motors use solid propellant as fuel, which is usually made of a mixture of a fuel and an oxidizer. In this case, ignition is achieved by a small explosive charge or a heating element.
Ignition is a critical step in the launch process, as it provides the initial thrust required to lift the rocket, missile or aircraft off the ground.