Density of Inlet Air (\(\rho_a\)):

\[ \rho_a = \frac{p}{0.287 \Theta} \]

Density of Engine Exhaust (\(\rho_{ex}\)):

\[ \rho_{ex} = \frac{p}{0.277 \Theta} \]

Where:

• \(\rho_a\) is the density of inlet air, kg/m³.
• \(\rho_{ex}\) is the density of engine exhaust, kg/m³.
• \(p\) is the gas pressure, kPa.
• \(\Theta\) is the gas temperature, K.