Discussion
Free stream total pressure is \( 180 \ \mathrm{kPa} \) and the compressor face sees \( 171 \ \mathrm{kPa} \). The total pressure recovery is
Answer: A
Recovery is the ratio of the two total pressures, \( 171/180 = 0.95 \). A five per cent loss sounds modest but typically costs rather more than five per cent in thrust, which is why intake design receives so much attention on fast aircraft.
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