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A turbofan engine with an inlet air mass flow of 220 kg/s and a HP compressor mass flow of 20 kg/s has a bypass ratio of:
  • A
    11
  • B
    10
  • C
    1.1
  • D
    12
Formulas:
Bypass mass flow = inlet mass flow - HP compressor mass flow
Bypass ratio = bypass mass flow / HP compressor mass flow
  • Bypass mass flow = 220 kg/s - 20 kg/s = 200 kg/s
  • Bypass ratio = 200 kg/s / 20 kg/s = 10

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