Explain the structure of a flame ?
Answers
Answer:
Inner Part: This is the innermost part of the flame. It is the part closest to the wick. You might assume that this is the hottest part of the flame. However, it is the least hot. This is the black part of the flames that contains unburnt particles of the carbon from the wick i.e. unburnt fuel.
Middle Part: This is the biggest part of the flame. The colors in this are varying shades of yellow and orange. This is the luminous flame because it emits light. This part is also not extremely hot. This is because this part gets a limited supply of oxygen. So incomplete combustion takes place here. Which is why it burns orange and is luminous.
Outer Part: Now this is the hottest part of the flame. This part has an unlimited supply of oxygen. So complete combustion takes place here. Hence it is the hottest part of the flame. Also, this part of the flames burns with a blue color. It is the non-luminous, i.e. does not emit light
Answer:
A flame consists of three zones
i) innermost zone :- it is a dark or black coloured zone. it consists of hot unburnt vapors of combustible material. it is the least hot part of the flame.
ii) middle zone :- it is the bright and Luminous zone. it produces a moderate temperature. here, partial combustion of the fuel takes place.
iii) outermost zone :- it is non luminous zone. here complete combustion of the fuel takes place because there is plenty of air around it. it has the highest temperature in the flame that is it is the hottest part of the flame.