Essay On Turbofan Engine

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TURBOFAN ENGINE

TEAM NAME: MUST ADVENTURERS.
MEMBERS NAMES: 1)AMMARA TOFIQUE.
2)M.JAWAD MUZAFFAR.
UNIVERSITY: MIRPUR UNIVERSITY OF SCIENCE AND
TECHNOLOGY (MUST) , MIRPUR,AZAD
KASHMIR.
CITY:MIRPUR,AZAD KASHMIR.
STATE:AZAD KASHMIR.
DEPARTMENT:MECHANICAL ENGINEERING.
ROLL NUMBERS:1)11-ME-12.
2)12-ME-45.

1)Definition Of A Turbofan Engine:
Turbofan is the combination of two words.”Turbo” means gas turbine engine which takes mechanical energy from combustion and “Fan” means a fan is use which consumes the mechanical energy from gas turbine to accelerate air rearwards.
2)History Of Turbofan Engines:
1)The first turbofan was tested in April 1,1943 by Daimler Benz.
2)In 1960s,low bypass ratio turbofan engines were introduced.
3)Then further modification was done by introducing improved materials and twin compressors.
3)Construction Of A Turbofan Engine:

Fig.1 A Turbofan Engine

It consists of:
1)Intake Duct/Air Inlet:
It is responsible for suction of air.
2)Compressor:
It can be axial or centrifugal.
1)Axial Compressors:
Those compressors in which gas or working fluid flows parallel to the axis of rotation.

Fig,2 An Axial Flow Compressor

2)Centrifugal Compressors:
Those compressors in which the compression is obtained by centrifugal force. They make use of rotating vanes or impel...

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...fic impulse(in seconds) is taken along y-axis.It shows the efficiency as a function of speed of different types of jets.It concludes that efficiency per unit distance(per Km/mile) is independent of speed for jet engines as a group.
10)Advantages Of Turbofan Engine:
 Turbofan engine is more fuel efficient.
 It is quieter due to greater mass flow and lower total exhaust speed.
11)Disadvantages Of Turbofan Engine:
 Turbofan engine gives rise to greater complexity due to additional ducting e.g. addition of multiple shafts, heavy blades.
 Top speed is limited due to the potential for shockwaves to damage engine.
 They are more subject to Foreign Object Damage(FOD) i.e.damage cause to aircrafts when nuts,bolts etc are misplaced during jet blast,engine intake and ice damage.
12)References:
 www.scribd.com.
 www.grc.nasa.gov.
 Engines.fighter-planes.com.

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