20 A turbofan engine with bypass ratio - 5 is to operate at the same core en-

gine pressure ratio and maximum temperature as prescribed in the previous

problem. Determine the specific thrust, the thrust specific fuel consumption,

and the efficiencies for a fan pressure ratio p₁ = 1.5. The component effi-

ciencies and ambient conditions are as given in Tables 5.1 and 5.2.

If you are using a spreadsheet for your calculations, explore the possibil-

ity of finding a combination of bypass ratio and fan pressure ratio that maxi-

mizes the overal efficiency.