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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
  • What is the difference between a high bypass turbofan and a low bypass . . .
    The first turbofan, the RR Conway, had just a bypass ratio of 0 25 It was designed for installation into the wing root of airplanes like the HP Victor bomber or the Vickers V-1000 transport project, so RR strived to keep the diameter small Of course, back then nobody distinguished low- and high-bypass engines The P W JT-3D, which powered most of the second generation of jet airliners
  • 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
  • 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 bypass air in a turbofan engine actually for?
    So a turbine and fan are used to capture energy from the exhaust gasses and use them to accelerate bypass air resulting in a turbofan For planes that spend a lot of time at low speeds, designers may use a gearbox and propeller instead of the fan resulting in a turboprop
  • 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
  • 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
  • What does a reduction gearbox do in a turbofan engine?
    I've read that the P amp;W PW1000G engine has a reduction gearbox What is it and does it have any relation to the fan or compressor speed? Does it improve fuel efficiency?
  • 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?





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