Hot combustion gases enter the nozzle of a turbojet engine at 250 kPa, 650°C, and 70 m/s and exit at80 kPa and 420°C. The mass flow rate is 1.2 kg/s. Assume the heat losses to the surroundings is 90kWand the surroundings is at 27°C. Determine (a) the exit velocity and (b) the decrease in the exergy ofthe gases. Take k = 1.3 and c, = 1.15 kJkg-°C for the combustion gases.Qtoss = 90kW250 kPaCombustiongases80 kPa650°C420°C70 m/sm = 1.2 kg/sm = 1.2 kg/s

Given data as P1=250 kPaT1=650 °C=923 Kv1=70 m/sP2=80 kPaT2=420 °C=693 Km˙=1.2 kg/sQloss=90 kW=90000…

Answered: Hot combustion gases enter the nozzle…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

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Section: Chapter Questions

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