Air density, often referred to simply as “ambient air density,” represents the mass of air per unit volume under standard conditions. “Ambient” indicates the surrounding environment, specifying factors like air density at a specific location and time. Under standard atmospheric conditions at sea level (ISA conditions), air density (ρ) is approximately 1.225 kg/m³.The formula to calculate density as follows:
Where:
- q is the dynamic pressure in Pa.
- M is the Mach Number,
- a is the Speed of sound in m/s.
- ρ is the Density in kg/m3.