Hi I’m making this live again.. lets start with Burner!!

The Flame Visibility
1. Low Luminous flame causes, Non uniform Temperature & heat flux distribution
2.Low Luminous flame causes Poor radiant heat transfer & hence lower thermax efficiency
3. While More luminous flame gives Good radiant heat transfer, Low flame temperature & low NOx

Flame Geometry & O2
Blue Whitish flame,7.5% O2 Whisling Noise
At high excess air & velocity, molecules of the fuel start burning in fractions. on-off in this manner they produce small explosion along the length.
Hence flame will be bright & fluctuating in nature

Blueish pinkish flame
Less blue, more pink gives less NOx, higher blue flame suggest excess air & higher NOx


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