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turbofan    音标拼音: [t'ɚbof,æn]
n. 涡轮风扇发动机; 涡轮风扇

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  • What is the difference between a turbofan and a turboprop engine . . .
    Turbofan is the most efficient engine and most of the thrust is produced from the bypass air The efficiency of the engine mainly depends on the engine bypass ratio Turbojet is mainly used on the fighter or acrobatic aircraft These aircraft’s thrust is further increased by the “after burner” installed at the nozzle of the engine
  • What is the difference between turbojet and turbofan engines?
    The thrust from the hot combustion products coming out the back is minor In a low-bypass turbofan, a good fraction of the thrust still comes from the jet part so it's part way between a pure turbojet and a modern high-bypass turbofan Better for higher speeds, and faster throttle response without a huge fan to spool up
  • turbofan - What does fan pressure ratio affect in an engine? - Aviation . . .
    The Fan Pressure Ratio (FPR) is part of the Overall Pressure Ratio (OPR, ratio of highest to lowest pressure in your primary gas path from inlet to combustor) The importance of the FPR depends on the application of your gas turbine, generally, higher pressure ratios are found in smaller fan diameters with lower flow capacity while lower pressure ratios are found in larger diameters with high
  • What is a high-bypass geared turbofan, and why is it so much more . . .
    The linchpin for the CSeries was a new concept for engines developed by Pratt Whitney, known as a high bypass geared turbofan The new engine design promised exceptional fuel savings of up to 20 percent and unusually low noise levels
  • How come a turboprop cant reach speeds as high as a turbofan?
    I understand that turbofan powered aircraft can reach much faster speeds than turboprops like the C130 Hercules, and I can't imagine a turbofan turboprop powered 737 would be of any use really, but
  • turbofan - How does the bypass air provide thrust? - Aviation Stack . . .
    The bypass air is accelerated by the fan at the front of the turbofan engine This changes its velocity and therefore its momentum, which is the definition of a force (in this case: thrust): $$ F = \frac {\text {d}} {\text {d}t} p = m \frac {\text {d}} {\text {d}t} v = m \cdot a $$ This thrust contributes to the total thrust of the engine How much will depend on the bypass ratio of the engine
  • What is the fan pressure ratio in a turbofan? - Aviation Stack Exchange
    I’m not convinced mixing of the flows at the exhaust is the main reason for selection of fpr After reading the paper it mainly seems as a supercharging stage for the compressors Fighter jet engines have around 30:1 and a fpr of 2 should double that If you look at a lot of modern commercial turbofans the exhaust is so far from the nacelle both streams should easily be ambient pressure by then
  • What is the operating temperature of a turbofan engine, and how is it . . .
    What is the operating temperature of a turbofan engine? If advancements were made to materials through material science for the internal components would increasing the operating temperature result in better fuel efficiencies, better thrust and optimal engine performance?
  • What are the advantages of 3 spool over 2 spool turbofan engines?
    There are two advantages; It's easier to match the compressor rotational speed with the turbine Typically, the first stages of the compressor want to rotate slower than the turbine is required to rotate The turbine needs to spin faster to help obtain as much energy from the airstream as possible, but initial stages of compression prefer to spin slower With 3 spools instead of 2, less
  • turbofan - How does the CFM LEAP-1B engine achieve the same efficiency . . .
    For turbofan engines, we know that the higher the bypass ratio, the higher the propulsive efficiency of the engine, which results in a lower fuel consumption So how does the CFM LEAP-1B engine achieve similar efficiencies to its larger siblings when its bypass ratio is considerably lower?





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