primary air

[′prī‚mer·ē ′er] (mechanical engineering) That portion of the combustion air introduced with the fuel in a burner.

primary air

1. In a water heater, the air which is fed to the burner to be mixed with gas. 2. The air which is delivered to any type of air outlet or grille by a supply duct.

primary air

That portion of the compressor output air used for the actual combustion of fuel. It is that portion of airflow flowing through the engine core. See also primary combustion.

单词	primary air
释义	primary air primary air [′prī‚mer·ē ′er] (mechanical engineering) That portion of the combustion air introduced with the fuel in a burner. primary air 1. In a water heater, the air which is fed to the burner to be mixed with gas. 2. The air which is delivered to any type of air outlet or grille by a supply duct. primary air That portion of the compressor output air used for the actual combustion of fuel. It is that portion of airflow flowing through the engine core. See also primary combustion.
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