7 / 20

The bypass ratio:

I. is the ratio of inlet airflow to HP compressor flow.
II. can be determined from the inlet air mass flow and the HP compressor mass flow.

  • A
    I is correct, II is incorrect.
  • B
    I is correct, II is correct.
  • C
    I is incorrect, II is incorrect.
  • D
    I is incorrect, II is correct.
  • I. is the ratio of inlet airflow to HP compressor flow. INCORRECT
Refer to the following formulas:
Bypass ratio = bypass mass flow / HP compressor mass flow

Bypass mass flow = inlet mass flow – HP compressor mass flow

Bypass ratio is defined as the ratio between the mass flow rate of air drawn in by the fan bypassing the engine core (bypass mass flow) to the mass flow rate passing through the engine core (HP compressor mass flow).

  • II. can be determined from the inlet air mass flow and the HP compressor mass flow. CORRECT
Referring to the formulas shared above, we can conclude that bypass ratio is the ratio between bypass mass flow to HP compressor mass flow. The bypass mass flow can be obtained from the difference between inlet mass flow and HP compressor mass flow. Thus, bypass ratio can be determined knowing inlet air mass flow and HP compressor mass flow.

Your Notes (not visible to others)



This question has appeared on the real examination, you can find the related countries below.

Keyboard Shortcut Use Keyboard Shortcuts