What Basis Bypass Ratio Has Chosen For Turbofan Engine
Bypass ratios range from very small in some applications to very large in others. What do you mean by basis?
It's all dictated by the cycle requirements. There is no quick way to nail it down.
if you see bypass ratio varies from 0.1:1>br<1:1 for turbojet engine and 5:1>br<11:1 for turbofan engine.
Some turbofan engine has bypass ratio CFM 56 2c1 has 6, and CFM 56-5b3/4 has 5.3 and 5.5 has Ge 90 has 8.4 and ge 90-115b has 9 and various ratio. when your check this the thrust range is also varies with bypass ratio. is bypass ratio chosen by thrust or any other parameter.
It's chose by flight regime of the engine's intended use. For most commercial applications, high bypass turbofans are more efficient, as the design parameter is simply sustained high sub-mach cruise, with sufficient thrust for one engine-out performance at max gross take-off weight.
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