Bypass Ratio

vincentryan

What Basis Bypass Ratio Has Chosen For Turbofan Engine

minger

Bypass ratios range from very small in some applications to very large in others. What do you mean by basis?

FredGarvin

It's all dictated by the cycle requirements. There is no quick way to nail it down.

vincentryan

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.

*mugaliens*

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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vincentryan	Bypass Ratio Tweet What Basis Bypass Ratio Has Chosen For Turbofan Engine

minger Recognitions: Science Advisor	Bypass ratios range from very small in some applications to very large in others. What do you mean by basis?

FredGarvin Recognitions: Science Advisor	It's all dictated by the cycle requirements. There is no quick way to nail it down.

vincentryan	Bypass Ratio 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.

mugaliens Blog Entries: 1	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.