What is Air. A Standard Model for Combustion Simulations

摘要

Most combustion devices utilize air as the oxidizer. Thus, reactive flow simulations of these devices require the specification of the composition of air as part of the physicochemical input. A mixture of only oxygen and nitrogen often is used, although in reality air is a more complex mixture of somewhat variable composition. We summarize some useful parameters describing a standard model of dry air. Then we consider modifications to include water vapor for creating the desired level of humidity. The 'minor' constituents of air, especially argon and water vapor, can affect the composition by as much as about 5 percent in the mole fractions.