flame structure

A flame’s structure consists of distinct zones: the innermost core is unburned fuel; just outside is the blue, luminous region called the combustion zone where fuel reacts with oxygen rapidly, producing heat and light. Surrounding this is the cooler, outer zone where combustion is incomplete or cooling occurs. The flame’s appearance depends on factors like fuel type and air supply, with blue flames indicating efficient combustion and yellow or orange flames suggesting incomplete burning. Overall, the flame reflects the complex interplay of fuel, oxygen, and heat during combustion.