Turbine 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/Gas_turbine


00:01:53 1 Timeline of development
00:08:45 2 Theory of operation
00:13:13 2.1 Creep
00:14:59 3 Types
00:15:08 3.1 Jet engines
00:15:52 3.2 Turboprop engines
00:16:31 3.3 Aeroderivative gas turbines
00:17:06 3.4 Amateur gas turbines
00:18:28 3.5 Auxiliary power units
00:19:10 3.6 Industrial gas turbines for power generation
00:22:14 3.7 Industrial gas turbines for mechanical drive
00:23:32 3.7.1 Compressed air energy storage
00:24:11 3.8 Turboshaft engines
00:25:10 3.9 Radial gas turbines
00:25:42 3.10 Scale jet engines
00:26:17 3.11 Microturbines
00:26:51 4 External combustion
00:28:19 5 In surface vehicles
00:31:08 5.1 Passenger road vehicles (cars, bikes, and buses)
00:32:11 5.1.1 Concept cars
00:37:25 5.1.2 Racing cars
00:39:35 5.1.3 Buses
00:40:33 5.1.4 Motorcycles
00:41:26 5.2 Trains
00:41:43 5.3 Tanks
00:44:51 5.4 Marine applications
00:45:00 5.4.1 Naval
00:49:43 5.4.2 Civilian maritime
00:58:16 6 Advances in technology
01:00:58 7 Advantages and disadvantages
01:01:13 7.1 Advantages
01:02:40 7.2 Disadvantages
01:03:11 8 Testing



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SUMMARY
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A gas turbine, also called a combustion turbine, is a type of continuous combustion, internal combustion engine. The main elements common to all gas turbine engines are:

An upstream rotating gas compressor;
A combustor;
A downstream turbine on the same shaft as the compressor.A fourth component is often used to increase efficiency (on turboprops and turbofans), to convert power into mechanical or electric form (on turboshafts and electric generators), or to achieve greater thrust-to-weight ratio (on afterburning engines).
The basic operation of the gas turbine is a Brayton cycle with air as the working fluid. Atmospheric air flows through the compressor that brings it to higher pressure. Energy is then added by spraying fuel into the air and igniting it so the combustion generates a high-temperature flow. This high-temperature high-pressure gas enters a turbine, where it expands down to the exhaust pressure, producing a shaft work output in the process. The turbine shaft work is used to drive the compressor; the energy that is not used for compressing the working fluid comes out in the exhaust gases that can be used to do external work, such as directly producing thrust in a turbojet engine, or rotating a second, independent turbine (known as a power turbine) which can be connected to a fan, propeller, or electrical generator.  The purpose of the gas turbine determines the design so that the most desirable split of energy between the thrust and the shaft work is achieved. The fourth step of the Brayton cycle (cooling of the working fluid) is omitted, as gas turbines are open systems that do not use the same air again.
Gas turbines are used to power aircraft, trains, ships, electrical generators, pumps, gas compressors, and tanks.