(Solution) - A modern jet engine operates so that the fuel is -(2025 Original AI-Free Solution)

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Academic Level: Undergrad. (yrs 3-4)

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A modern jet engine operates so that the fuel is sprayed into air at a P, T higher than the fuel critical point. Assume we have a rich mixture of 50% n-octane and 50% air by mole at 500 K and 3.5 MPa near the nozzle exit. Do I need to treat this as a real gas mixture or is an ideal gas assumption reasonable? To answer find Z and the enthalpy departure for the mixture assuming Kay?s rule and the generalized charts.