QoD: JET ENGINE EFFICIENCY

Knowing the thermal processes $($Brayton cycle$)$ of the jet engine

$($ pV diagram$),$ one can calculate the engine efficiency of the engine.

Alternatively, we can set the upper bound of the efficiency with

the temperatures in different stages in the jet engine using $2^{nd}$ Law.

Question:

$($a$)$ Search online about an airplane jet engine $($anyone$)$ and fill

the information below:

Airplane model:

Engine model:

Cruising altitude and air temperature at that altitude: $T_1=$

Turbine inlet temperature

$($Air$+$Fuel temperature entering the turbine after combustion$)$: $T_3=$

$($b$)$ With the information above, find the upper bound of the efficiency limited by $2^{nd}$ Law $($Carnot$).$

$($c$)$ The efficiency of airplane jet engine is higher than Otto and Diesel engines in general. Give one

main reason for it$.$