How would you describe combustion?

Combustion, or burning, is a high-temperature exothermic redox chemical reaction between a fuel (the reductant) and an oxidant, usually atmospheric oxygen, that produces oxidized, often gaseous products, in a mixture termed as smoke.

What are the 3 stages of combustion?

Based on the experimental results the combustion in SI engines takes place in three stages as follows:

• Period of ignition Lag Or preparation phase.
• Flame propagation phase.
• after burning or flame termination phase.

What are the steps of combustion?

Three things are required in proper combination before ignition and combustion can take place—Heat, Oxygen and Fuel.

• There must be Fuel to burn.
• There must be Air to supply oxygen.
• There must be Heat (ignition temperature) to start and continue the combustion process.

What are the 4 stages of combustion?

An internal-combustion engine goes through four strokes: intake, compression, combustion (power), and exhaust.

What are the stages of combustion in spark ignition engine?

Stages of combustion in spark ignition engine. There are 3 stages of combustion ignition lag, flame propagation, after burning.

What are the stages of combustion in CI engine?

There are four different stages of combustion in CI engine where proper combustion of air and fuel takes place as follows: Ignition Delay Period….

• Ignition Delay Period.
• Period of Uncontrolled Combustion.
• Period of Controlled Combustion.
• After Burning.

What kind of reaction is combustion?

exothermic reaction
Combustion is another name for burning. It is an example of an exothermic reaction, a reaction that releases energy to the surroundings.

Is combustion a physical process?

Combustion is not a physical process. Because, in combustion the oxygen is reacted with the substance and there is a formation of heat will take place. In a combustion reaction, there is a reaction between a fuel, that is hydrocarbon and oxygen will take place.

What is Stage 4 of the 4 key stage of fire?

Stage Four – Decay The decay of a fire is the phase when the fire decreases in intensity until it is either a smolder or non-existent. If there was no suppression, this is likely when there is nothing left for the fire to burn.

How does a 4 cycle engine work?

A 4-stroke engine is a very common variation of an internal combustion engine. During engine operation, pistons go through 4 events to achieve each power cycle. The definition of an event is an up or down piston motion. Upon completion of the 4 events, the cycle is complete and ready to begin again.

What are the four steps of the combustion cycle?

1) Pre-flame combustion 2) Uncontrolled combustion 3) Controlled combustion and 4) After burning.

What is the first stage of an internal combustion engine?

Ignition Delay Period. At this first stage of combustion in the CI engine,the fuel from the injection system sprayed in the combustion chamber in the form of a

Period of Uncontrolled Combustion. This is the second stage of combustion in the CI engine.

Period of Controlled Combustion.

After Burning.

What are stages of combustion in CI engines?

Stages of combustion in CI engine Ignition Lag. The time interval between the injection of the fuel and the start of the self-ignition of the fuel is known as ignition lag or Ignition delay. Rapid Combustion. The period of rapid combustion also known as the uncontrolled combustion. Controlled Combustion. After Brning.

What is smoldering stage in combustion?

The smoldering stage is a region of fully developed pyrolysis that begins with ignition and includes the initial stage of combustion. Invisible aerosol and visible smoke particles are generated and transported away from the source by moderate convection patterns and background air movement.