There are different methods of distributing the required components of combustion to a flame. In a diffusion flame, oxygen and fuel diffuse into each other; the flame occurs where they meet. In a premixed flame, the oxygen and fuel are premixed beforehand, which results in …

This helps us to classify the parts of a flame which are as following: 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.

There are three main types of flame: neutral (balanced), excess acetylene (carburising), and excess oxygen (oxidising). A pure flame is considered neutral because the metal being welded would in most situations have no chemical effect.

2023年7月3日 · 1) The Innermost zone of a flame is dark or black:It consist of hot,unburnt vapours of the combustible material.It is the least hot part of the flame.It is the coldest part of the flame.

2024年4月3日 · The main parts of a flame include the outer cone (blue region), inner cone (yellow region), and the dark zone between them. What does the outer blue region of a flame indicate?

2025年1月1日 · Summary A flame is a visible and gaseous part of the fire where fuel vapor burns to produce heat and light. A candle flame has three zones; outer, middle, and inner. The outer zone is blue, non-luminous, and the hottest part of the flame. The middle zone is yellow in color, luminous, and moderately hot.

2024年12月11日 · flame, rapidly reacting body of gas, commonly a mixture of air and a combustible gas, that gives off heat and, usually, light and is self-propagating. Flame propagation is explained by two theories: heat conduction and diffusion.

Here's the sequence of events in a typical wood fire: Something heats the wood to a very high temperature. The heat can come from lots of different things -- a match, focused light, friction, lightning, something else that is already burning...

A flame consists of three zones (or three parts). These are : innermost zone, middle zone and outer zone. The three zones of a flame have different colours and different temperatures. We will now describe the three zones of a flame in detail by taking the example of candle flame. (i) The innermost zone of a flame is dark (or black) (see Figure).

2023年6月22日 · Flame is referred to as a visible, gaseous component of fire. It is caused by a highly exothermic chemical reaction in a thin zone. Very hot flames have ionized gaseous components of sufficient density to be considered plasma.