Duct engine | Wikipedia audio article
Channel: wikipedia tts
Date: 2019-07-06

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Airbreathing_jet_engine


00:01:18 1 Background
00:04:57 2 Types of airbreathing jet engines
00:05:45 2.1 Turbojet engine
00:06:46 2.2 Turbofan engine
00:10:10 2.3 Turboprop and turboshaft
00:11:43 2.4 Propfan
00:12:39 3 Major components
00:12:55 3.1 Cold Section
00:15:17 3.2 Hot section
00:17:52 4 Operation
00:18:01 4.1 Engine cycle
00:18:37 4.2 Thrust lapse
00:20:33 5 Safety and reliability
00:20:51 5.1 Engine surge
00:21:33 5.2 Blade containment
00:21:55 5.3 Bird ingestion
00:23:46 5.4 Volcanic ash
00:24:29 5.5 Uncontained failures
00:25:43 6 Economic considerations
00:26:07 7 Environmental considerations
00:27:02 8 Advanced designs
00:27:12 8.1 Ramjet
00:29:02 8.2 Scramjets
00:30:40 8.3 P&amp;W J58 Mach 3+ afterburning turbojet
00:31:46 8.4 Hydrogen-fuelled air-breathing jet engines
00:33:09 8.5 Precooled jet engines
00:34:05 8.6 Turborocket
00:34:58 9 Terminology
00:36:48 10 See also



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SUMMARY
=======
An airbreathing jet engine (or ducted jet engine) is a jet engine propelled by a jet of hot exhaust gases formed from air that is forced into the engine by several stages of centrifugal, axial or ram compression, which is then heated and expanded through a nozzle. They are typically gas turbine engines. The majority of the mass flow through an airbreathing jet engine is provided by air taken from outside of the engine and heated internally, using energy stored in the form of fuel.
All practical airbreathing jet engines are internal combustion engines that directly heat the air by burning fuel, with the resultant hot gases used for propulsion via a propulsive nozzle, although other techniques for heating the air have been experimented with (such as nuclear jet engines). Most modern jet engine designs are turbofans, which have largely replaced turbojets. These modern engines use a gas turbine engine core with high overall pressure ratio (about 40:1 in 1995) and high turbine entry temperature (about 1800 K in 1995), and provide a great deal of their thrust with a turbine-powered fan stage, rather than with pure exhaust thrust as in a turbojet. These features combine to give a high efficiency, relative to a turbojet. A few jet engines use simple ram effect (ramjet) or pulse combustion (pulsejet) to give compression.