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combustion

Combustion is a chemical process in which a substance reacts rapidly with oxygen and gives off heat. The original substance is called the fuel, and the source of oxygen is called the oxidizer. The fuel can be a solid, liquid, or gas, although for airplane propulsion the fuel is usually a liquid.

Explosive Combustion

Explosive Combustion happens when the reaction occurs very rapidly. The reaction occurs when something ignites to produce heat, light and sound energy, The simple way to describe is it to call it an explosion. Some classic examples are firecrackers or blowing up of dynamite.

luminous zone of flame

Luminous zone is bright and is the middle zone of candle flame. The temperature in this zone is moderate hot. It does not have a sufficient supply of oxygen. The colour of this zone is yellow.

Outermost or Non-Luminous zone of flame

The zone of complete combustion is known as a non-luminous zone. In this zone complete combustion of fuel takes place due to the availability of sufficient oxygen. This is the outermost zone of a flame with the highest temperature.