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- 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 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
- turbofan - Why is thrust available constant with speed for turbojet . . .
Similarly, why is power available (nearly) constant with speed for a propeller engine, while it varies for a jet engine?
- 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?
- turbofan - Why do we refer to power for turboprop engines and thrust . . .
In jet engines, I read that thrust is related to the fuel flow rate, whereas in turboprop engines power produced is related to the fuel flow rate What is the reason and brief math behind this?
- turbofan - How does a fan differ from a propeller? - Aviation Stack . . .
Which is why they use a ducted fan in hovercrafts, for instance But if that's true, shouldn't the fan in a turbofan be open (unshrouded), considering the high speeds (higher than a propeller)? Also, how does the fan get away with supersonic tip speeds and the prop don't? Would the fan be more efficient if tip speeds were lower?
- 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 are the mass flow rate and exhaust velocity for a CF6 or GE90 . . .
8 For a typical turbofan jet engine (two examples given in the title), what is the exhaust velocity and mass flow rate of air at sea level and cruising altitude (~ FL350)? Also, does the specific impulse vary at different altitudes, since the density of air decreases with increases in altitude?
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