A lower flame emissivity value than the standard value should be used.
The strong-jet/weak-jet coupling is basic to a new generation of ultra-low-NOx burners that are diffusion type and rely on lower flame temperatures through controlled mixing of the air, the fuel, and recirculated combustion products.
On the other hand, ethanol with 5%Al2O33 volumetric concentration resulted in a 1-2% lower flame temperature than pure ethanol, agreeing with the experimental result that n-Al2O3 did not participate in the combustion.
Furthermore, oxidizers with lower oxygen concentrations always resulted in a larger flame volume, a lower peak flame temperature and a lower NO emission.
Soot volume fraction predictions on the wings and at lower flame heights are considerably improved by using benzopyrene, due to the different distribution of the soot forming PAH molecule in the flame.
"We are still on a lower level.
Once the milk comes to a boil, lower the flame.
Put a large frying pan on a medium flame.
Heat a griddle pan on a high flame.
