In aircraft design, the term “density” generally refers to the air density or the density of the fluid (usually air) passing through a throttle. Air density is a critical parameter in aviation as it affects the engine’s performance.
Formula:The density (ρ) of the fluid passing through the throttle can be calculated using the ideal gas law, which relates pressure (P), temperature (T), and the gas constant (R) to density:
- ρ = Density of the fluid (in kilograms per cubic meter, kg/m³)
- P = Pressure of the fluid (in pascals, Pa)
- R = Specific gas constant of the fluid (in joules per kilogram per kelvin, J/(kg·K))
- T = Temperature of the fluid (in kelvin, K)