In the context of aircraft design, “density” refers to air density. Air density, denoted by the Greek letter ρ (rho), is the mass of air per unit volume in a particular location and is a critical parameter in aerodynamics. The formula for air density is defined as:
- ρ = Density of the fluid (in kilograms per cubic meter, kg/m³)
- P = Pressure of the fluid (in pascals, Pa)
- R = Specific gas constant for the fluid (in J/(kg·K))
- T = Temperature of the fluid (in kelvin,K)