(a) What is the efficiency of the jet engine in Example 21.9?

(b) If the jet engine were to operate on a Carnot cycle between the same highest and lowest temperatures, what would its efficiency be?

Data from Example 21.9

Consider a jet engine operating on the Brayton cycle. The working substance is air, which consists primarily of diatomic molecules. The air is drawn in at atmospheric pressure, \(1.01 \times 10^{5} \mathrm{~Pa}\), at \(288 \mathrm{~K}\). In the combustion chamber, the temperature of the air is raised to \(1520 \mathrm{~K}\), and the engine has a pressure ratio of 30 . What are the temperatures at the end of the two isentropic processes?