What term is used to describe the air used for atomizing fuel in a burner?

The term "primary air" is used to describe the air that is mixed with fuel in a burner to ensure proper atomization. Atomization is the process of breaking down the fuel into small droplets, which facilitates efficient combustion. Primary air is essential for creating the right conditions for fuel combustion, as it helps to disperse the fuel and achieve a fine spray that allows for better mixing with the surrounding air. This optimal mixture is crucial for achieving complete combustion, which maximizes efficiency and minimizes emissions.

In contrast, secondary air refers to air that is added after combustion has begun, to complete the burning of any remaining fuel. Tertiary air is less common and typically refers to additional air supplied in specific situations to enhance combustion or reduce emissions. Compressed air, while beneficial in certain applications, does not specifically describe the air used for atomizing fuel in a burner. Therefore, "primary air" is the most accurate term for this crucial part of the combustion process.