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Topic: Gas-turbine


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In the News (Sun 27 Dec 09)

  
 Gas turbine - Wikipedia, the free encyclopedia
Gas turbines are described thermodynamically by the Brayton cycle, in which air is compressed isentropically, combustion occurs at constant pressure, and expansion over the turbine occurs isentropically back to the starting pressure.
Gas turbines are used in many naval vessels, where they are valued for their high power-to-weight ratio and their ships' resulting acceleration and ability to get underway quickly.
Gas turbines are used on ships, locomotives, helicopters, and in tanks.
en.wikipedia.org /wiki/Gas_turbine   (2504 words)

  
 Gas Turbine Training
Gas Turbine Training is an independent training source for the LM6000, LM5000, LM2500, LM2500+, LM1600, LM1500, Frame 5, Frame 6 gas turbine engines.
The Company has over 39 years experience in the maintenance and overhaul of gas turbine engines and has worked for numerous Fortune 500 company's as an instructor for gas turbine engine maintenance.
www.gasturbinetraining.com   (64 words)

  
 Howstuffworks "How Gas Turbine Engines Work"
You may have never heard of gas turbine engines, but they are used in all kinds of unexpected places.
For example, many of the helicopters you see, a lot of smaller power plants and even the M-1 Tank use gas turbines.
Most commercial jets are powered by turbofan engines, and turbofans are one example of a general class of engines called gas turbine engines.
www.howstuffworks.com /turbine.htm   (103 words)

  
 Gas Turbine Propulsion
Early gas turbine engines worked much like a rocket engine creating a hot exhaust gas which was passed through a nozzle to produce thrust.
Because gas turbine engines are so important for modern life, we will be providing a lot of information about turbine engines and their operation.
Most modern, high speed passenger and military aircraft are powered by gas turbine engines.
www.lerc.nasa.gov /WWW/K-12/airplane/turbine.html   (103 words)

  
 LM2500 Gas Turbine Engine
An advantage of a gas turbine engine is its ability to be removed from the ship for repair in a short period of time (approximately 72 hours).
The HP turbine uses approximately 65% of the thermal energy from the combustor to drive the compressor and engine mounted accessories.
The HP turbine is a two stage axial flow type which is mechanically coupled to the compressor rotor.
www.fas.org /man/dod-101/sys/ship/eng/lm2500.htm   (103 words)

  
 Patent 4263997
A turbine engine having a power turbine rotor which is directly coupled for rotation with a compressor rotor may be referred to as a single shaft gas turbine engine.
Engine speed is controlled in response to exhaust gas temperature and engine speed feedback for operation at 100% rated speed under full load conditions and for optimum fuel consumption under part load conditions.
Engine speed is controlled in a conventional manner by regulating the engine fuel flow in response to a fuel command signal which is normally proportional to the difference between a commanded and an actual engine speed.
www.freepatentsonline.com /4263997.html   (103 words)

  
 Gas turbine-electric locomotive - Wikipedia, the free encyclopedia
A gas turbine-electric locomotive, or GTEL, is a locomotive that uses a gas turbine to drive an electric generator or alternator.
After the oil crisis in the 1970s and the subsequent rise in fuel costs, gas turbine locomotives became uneconomical to operate, and many were taken out of service.
Blade erosion and soot buildup plagued all of the turbines.
en.wikipedia.org /wiki/Gas_turbine-electric_locomotive   (2042 words)

  
 CITS aircraft gas turbine engine program
The first component in an aircraft gas turbine engine is the compressor, which raises the pressure of the air flowing through the engine.
The final stage of a gas turbine engine is the turbine itself, which extracts power from the hot gas emerging from the combustor.
The turbine power is used to run the compressor and the fan, which moves most of the air that propels the airplane.
ctr-sgi1.stanford.edu /CITS/engine.html   (2042 words)

  
 gas-turbine engine --  Encyclopædia Britannica
The principle of the gas turbine is that of compressing and burning air and fuel in a combustion chamber and using the exhaust jet from this process to provide the reaction that propels the engine forward.
Most gas turbines operate on an open cycle in which air is taken from the atmosphere, compressed in a centrifugal or axial-flow compressor, and then fed into a combustion chamber.
While in a piston engine the air is alternately drawn in and exhausted, a gas turbine engine draws air in continuously.
www.britannica.com /eb/article-9106038   (2042 words)

  
 Gas Turbine Engine - AskTheBrain.com
The engine is believed to be a combined cycle powerplant that integrates conventional gas turbine and rocket technologies.
Problem Natural gas is commonly used as a fuel in gas engines and turbines in the hydrocarbon processing industry.
TURBOPROP - Gas turbine engine in which maximum energy is taken from the turbine to drive a reduction gear and conventional propeller.
www.askthebrain.com /engine_ga_turbine-.html   (2042 words)

  
 Research • keith-knipling.com
What follows is a brief introduction to gas turbine engines, which will provide you with some basic information motivating my research in developing new high temperature aluminum-based alloys.
Turbine blades in the hottest sections of the engine (the turbine) are typically made of nickel alloys, whereas "cooler" sections exploit titanium and aluminum alloys.
Turbine blades are highly susceptible to creep failure, due to the high level of stress induced by the centrifugal forces coupled with elevated operating temperatures.
www.keith-knipling.com /research   (2042 words)

  
 EngineSim 1.6e beta
The total engine performance is always displayed on the control panel panel at the upper right and includes the engine net thrust, the fuel flow rate, the engine air flow rate, the engine weight, the thrust to weight ratio, and the specific fuel consumption.
The thrust to weight ratio of the engine is displayed in the numerical output and is a measure of the efficiency of the engine.
As you choose a different component the part of the engine being affected is highlighted in the graphic by changing from its default color to yellow.
www.grc.nasa.gov /WWW/K-12/airplane/ngnsim.html   (2042 words)

  
 turbine on Encyclopedia.com
The term gas turbine is usually applied to a unit whose essential components are a compressor, a combustion chamber, and a turbine that resembles a steam turbine.
The turbine drives the compressor, which feeds high-pressure air into the combustion chamber; there it is mixed with a fuel and burned, providing high-pressure gases to drive the turbine, the gases expanding until their pressure drops to atmospheric pressure.
Gas turbines are used mainly as aircraft engines.
www.encyclopedia.com /html/t1/turbine.asp   (2042 words)

  
 gas-turbine-engine
The turbine, which is directly coupled to the compressor, provides the power to compress the air; the gas leaving the nozzle provides the thrust to propel the aircraft.
Although the Gas Turbine Engine is one of the most complicated machines ever engineered by man, the concept is actually fairly simple.
However, some turbo-jet engines are not fitted with starter motors at all, but direct the air obtained from an external source, or from an engine that is running, through non-return valves and nozzles onto the turbine blades.
www.bath.ac.uk /~en0id/bath-uni/mech-eng/gas-turbine-engine/gas-turbine-engine.htm   (2042 words)

  
 Gas Turbine Engine Collecting and Operating Home Page
Gas turbines for collecting or hobby uses fall into three distinct categories, firstly there are commercially produced engines which take the form of industrial or aerospace units.
A second form of gas turbine engine can be constructed by making use of a complete automotive turbo-charger unit, it is possible to add a combustion system to an otherwise virtually unmodified turbo to create a cheap and simple demonstration gas turbine.
These engines are the most common form of gas turbine a subset of which are APUs or stationary small power plants, it is this type of engine which is the main focus of this website.
www.gasturbine.pwp.blueyonder.co.uk /newpage.htm   (2042 words)

  
 Gas turbine - Wikipedia, the free encyclopedia
Gas turbines are described thermodynamically by the Brayton cycle, in which air is compressed isentropically, combustion occurs at constant pressure, and expansion over the turbine occurs isentropically back to the starting pressure.
Gas turbines are used in many naval vessels, where they are valued for their high power-to-weight ratio and their ships' resulting acceleration and ability to get underway quickly.
Gas turbines are used on ships, locomotives, helicopters, and in tanks.
en.wikipedia.org /wiki/Gas_turbine   (1904 words)

  
 GAS ENGINE - LoveToKnow Article on GAS ENGINE
Gas engines operating on the Otto cycle are usually of the single acting open cylinder type up to about 200 b.h.p., but for the larger engines closed cylinders of the double acting type are used.
The governing of large gas engines, too, is now effected so asj to keep up continuity of impulses by the method either of throttling the charge inlet or by varying the point of admission of gas alone or air and gas mixed.
Ai and A are inlet valves for gas and air.
www.1911ency.org /G/GA/GAS_ENGINE.htm   (1904 words)

  
 GAS TURBINE ENGINE TYPES AND CONSTRUCTION
There are two primary means of classifying gas turbine engines: (1) by the type of compressor used and (2) by how the power is used.
Most gas turbines of modern design use the dual-entry compressor to reduce engine diameter.
A plenum (an enclosure in which air is at a pressure greater than that out­side the enclosure) chamber is also required for dual-entry compressors, since the air must enter the engine at almost right angles to the engine axis.
www.tpub.com /fireman/48.htm   (1904 words)

  
 Homebuilt Gas Turbine FAQ
THE HOMEBUILT GAS-TURBINE ENGINE FAQ Foreword on safety 1.
However, don't be tempted to run your engine in an enclosed space -- there's a very real risk of setting fire to objects some distance away from the engine and a risk of explosion or asphyxiation from the gases produced.
Most engines will need to be producing a certain amount of compressor output before they will sustain (keep running) so having this gauge helps you to know when to remove your starter (the leaf blower).
www.aardvark.co.nz /pjet/faq.htm   (1904 words)

  
 Building A Primitive Turbine Engine
It doesn't normally run hot enough that the turbine can be seen to glow in daylight, so I looked around for a problem and found that the PVC air pipe was trying to blow off again, and was leaking air badly.
Someone on the turbo turbine mailing list is using a homemade air motor running on compressor bleed air to power a generator.
I also found that there is an air leak from the joint between the adaptor plate and the turbine inlet.
www.junkyardjet.com /primitive.html   (1904 words)

  
 Gas turbine engine (US6460343)
A gas turbine engine has a device for admitting a rotating fluid flow from an annular space of the casing to the inlet portion of a combustor to form a rotating fluid flow in the inlet portion of the combustor.
A method of operation of a gas turbine engine having a compressor for producing a fluid flow, a casing, a combustor in said casing, said combustor having an inlet portion, a turbine rotor disk with blades, and an annular space in said casing, said annular space surrounding said blades, said method comprising:
The rotating fluid flow is formed in the annular space of the casing by supplying a fluid from a compressor to the blades of the turbine rotor disk.
www.delphion.com /details?pn=US06460343__   (1904 words)

  
 GAS TURBINE ENGINE
In this variation, the turbine exhaust gas is passed through a heat exchanger, called the regenerator, where some of the energy in the gas is transferred to the air coming from the compressor and going to the combustor.
In stationary gas turbines, such as those used for distributed electricity generation, the efficiency of the engine is improved by adding a regenerator, as shown in the following diagram:
The principles and processes equations for the compressor, burner, and turbine (processes 1-2, 2-3, and 3-4) are the same as for the open Brayton cycle engine.
gaia.ecs.csus.edu /~reardonf/MET140/brayton.htm   (1904 words)

  
 GTD-1250 Gas Turbine Engine
GTD-1250 gas turbine is the main powerplant of a T-80U MBT.
The engine is implemented in a triple-shaft scheme, with two independent turbocompressors and a free propulsion turbine with the built-in conicocylindrical reducer, and is kinematically connected to two planetary gear boxes.
The turbine has an adjustable nozzle system that provides for tank's braking with the engine, reduces turbine's rotation speed and prevents its overrunning when the gears are changed.
armor.yurteh.net /fofanov/Tanks/EQP/gtd-1250.html   (1904 words)

  
 Gas Turbine Engine
A simple turbine engine combustion chamber is represented by a double walled curving duct as shown in Figure 5-14.
The negative element number in the above line indicates that the element is connected to the node on the inside of the bend.
The passage between the two walls conveys the bypass air while the inner duct conveys the main air stream.
www.bjjs.com.au /gas.htm   (1904 words)

  
 Gas-Turbine Jet Engine: The Gokart
When the engine is idling the wastegate will be open, allowing the gases to bypass the power turbine -- but when the throttle is increased above idle the wastegate will be closed and all the gasses will be made to flow through the turbine.
As you can see from the pictures on my gas-turbine engine page, the prototype of my engine is rather large with a huge vertical combustion chamber.
Another thing I'm not sure about is the amount of back-pressure that a stalled power turbine might produce when the kart is stationary and the engine is at idle.
aardvark.co.nz /pjet/turbine5.htm   (1904 words)

  
 Wired News: The Little Engine That Could Be
Weighing less than a gram, the engine is constructed from eight wafers of diffusion-bonded silicon and consists of a combustion chamber that ignites hydrogen and shoots hot gas past a spinning turbine that powers the compressor to drive the machinery.
No bigger than a regular shirt button, the micro gas turbine engine uses the same process for producing electricity as its big brother electricity stations -- burning fuel and running it through a power plant.
Frechette is currently assistant professor of mechanical engineering at Columbia University.
www.wired.com /news/technology/0,1282,48400,00.html   (1904 words)

  
 Howstuffworks "How Gas Turbine Engines Work"
You may have never heard of gas turbine engines, but they are used in all kinds of unexpected places.
Most commercial jets are powered by turbofan engines, and turbofans are one example of a general class of engines called gas turbine engines.
For example, many of the helicopters you see, a lot of smaller power plants and even the M-1 Tank use gas turbines.
travel.howstuffworks.com /turbine.htm   (1904 words)

  
 Aircraft Gas Turbine Engine Technology
Aircraft Gas Turbine Engine Technology provides a comprehensive, easy-to-understand treatment of the background, development, and applications of the gas turbine engine it its various forms, such as turobjet, turbofan, turboprop, and turboshaft powerplants.
I found this book to be intensively desciptive when I was taking my gas turbine technician course and would recommend it to any one who wishes to understand the concepts of the gas turbine engines.
You will learn how are Gas Turbines made, what kind of engine is currently being used in what kind of aircraft, how is the fuel system made, plus a much more.
www.rollingfelony.com /car-books-reviewed/0028018281.html   (1904 words)

  
 Pushby Queue :: Gas turbine engine motorcycle.
The difference is that a torque converter has hydraulic fluid in it and the T-63 Allison Gas Turbine (GM) has only air however air behaves hydraulicly.
A turbine engine on the other hand increases in horse power as it accelerates making it more capable of higher speeds and quicker acceleration.
I figured it had to be an axial flow turbine since they convert thrust to horse power thru the gear box much better than a true turbine powerplant would.
www.pushby.com /queue/technology/001305.html   (1904 words)

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