Enjin jet: Perbezaan antara semakan

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[[Image:engine.f15.arp.750pix.jpg|thumb|right|Sebuah enjin [[turbin kipas]] [[Pratt & Whitney F100]] untuk pesawat [[F-15 Eagle]] dan [[F-16 Fighting Falcon]] diuji di [[Pangkalan Tentera Udara Robins]], [[Georgia, A.S]]. Terowong di belakang enjin akan merendam bunyi bising dan membenarkan ekzos dilepaskan.]]
[[Image:engine.f15.arp.750pix.jpg|thumb|right|Sebuah enjin [[turbin kipas]] [[Pratt & Whitney F100]] untuk pesawat [[F-15 Eagle]] dan [[F-16 Fighting Falcon]] diuji di [[Pangkalan Tentera Udara Robins]], [[Georgia, A.S]]. Terowong di belakang enjin akan merendam bunyi bising dan membenarkan ekzos dilepaskan.]]


A '''jet engine''' is a [[reaction engine]] that discharges a fast moving [[jet (fluid)|jet]] of [[fluid]] to generate thrust in accordance with [[Isaac Newton|Newton's]] [[Newton's laws of motion|laws of motion]]. This broad definition of jet engines includes [[turbojet]]s, [[turbofan]]s, [[rocket engine|rocket]]s, [[ramjet]]s, [[Pulse jet engine|pulse jets]] and [[pump-jet]]s. In general, most jet engines are [[internal combustion engines]]<ref>[http://www.britannica.com/EBchecked/topic/290504/internal-combustion-engine Encyclopedia Britannica: Internal Combustion Engine]</ref> but non-combusting forms also exist.
'''Enjin jet''' merupakan sebuah [[enjin tindak balas]] yang membebaskan [[bendalir]] [[jet (bendalir)|jet]] yang bergerak laju bagi menghasilkan tujahan berdasarkan [[Peraturan pergerakkan Newton|peraturan gerakan]] [[Isaac Newton|Newton]]. Definasi luas ini termasuk [[turbin jet]], [[turbin kipas]], [[enjin roket|roket]], [[ramjet]], [[enjin denyutan jet|denyutan jet]] dan [[pam-jet]]. Secara umumnya, kebanyakkan enjin jet adalah sebuah [[enjin pembakaran dalam]]<ref>[http://www.britannica.com/EBchecked/topic/290504/internal-combustion-engine Encyclopedia Britannica: Internal Combustion Engine]</ref> tetapi bentuk bukan pembakaran juga wujud.


In some common usage, the term 'jet engine' generally refers to an [[internal combustion engine|internal combustion]] [[wiktionary:duct engine|duct engine]], which typically consists of an engine with a rotary (rotating) air compressor powered by a [[turbine]] ("[[Brayton cycle]]"), with the leftover power providing thrust via a [[propelling nozzle]]. These types of jet engines are primarily used by [[jet aircraft]] for long distance travel. The early jet aircraft used [[turbojet]] engines which were relatively inefficient for subsonic flight. Modern subsonic jet aircraft usually use [[Turbofan#High-bypass_turbofan_engines|high-bypass turbofan engines]] which help give high speeds as well as, over long distances, giving better fuel efficiency than many other forms of transport.
In some common usage, the term 'jet engine' generally refers to an [[internal combustion engine|internal combustion]] [[wiktionary:duct engine|duct engine]], which typically consists of an engine with a rotary (rotating) air compressor powered by a [[turbine]] ("[[Brayton cycle]]"), with the leftover power providing thrust via a [[propelling nozzle]]. These types of jet engines are primarily used by [[jet aircraft]] for long distance travel. The early jet aircraft used [[turbojet]] engines which were relatively inefficient for subsonic flight. Modern subsonic jet aircraft usually use [[Turbofan#High-bypass_turbofan_engines|high-bypass turbofan engines]] which help give high speeds as well as, over long distances, giving better fuel efficiency than many other forms of transport.

Semakan pada 02:29, 13 Februari 2009

Sebuah enjin turbin kipas Pratt & Whitney F100 untuk pesawat F-15 Eagle dan F-16 Fighting Falcon diuji di Pangkalan Tentera Udara Robins, Georgia, A.S. Terowong di belakang enjin akan merendam bunyi bising dan membenarkan ekzos dilepaskan.

Enjin jet merupakan sebuah enjin tindak balas yang membebaskan bendalir jet yang bergerak laju bagi menghasilkan tujahan berdasarkan peraturan gerakan Newton. Definasi luas ini termasuk turbin jet, turbin kipas, roket, ramjet, denyutan jet dan pam-jet. Secara umumnya, kebanyakkan enjin jet adalah sebuah enjin pembakaran dalam[1] tetapi bentuk bukan pembakaran juga wujud.

In some common usage, the term 'jet engine' generally refers to an internal combustion duct engine, which typically consists of an engine with a rotary (rotating) air compressor powered by a turbine ("Brayton cycle"), with the leftover power providing thrust via a propelling nozzle. These types of jet engines are primarily used by jet aircraft for long distance travel. The early jet aircraft used turbojet engines which were relatively inefficient for subsonic flight. Modern subsonic jet aircraft usually use high-bypass turbofan engines which help give high speeds as well as, over long distances, giving better fuel efficiency than many other forms of transport.

About 7.2% of the oil used in 2004 was ultimately consumed by jet engines.[2] In 2007, the cost of jet fuel, while highly variable from one airline to another, averaged 26.5% of total operating costs, making it the single largest operating expense for most airlines.[3]

Rujukan

  1. ^ Encyclopedia Britannica: Internal Combustion Engine
  2. ^ How many air-miles are left in the world’s fuel tank?
  3. ^ U.S. Airlines: Operating in an Era of High Jet Fuel Prices
  • John Golley (1997). Genesis of the Jet: Frank Whittle and the Invention of the Jet Engine. Crowood Press. ISBN 1-85310-860-X.
  • David S Brooks (1997). Vikings at Waterloo: Wartime Work on the Whittle Jet Engine by the Rover Company. Rolls-Royce Heritage Trust. ISBN 1-872922-08-2

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