gas turbine v ganesan pdf download
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i need gas turbine by V ganesan pdf . can you please provide me that?
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A gas turbine, also called a combustion turbine, is a type of internal combustion engine. It has an upwardly rotatable compressor coupled to a turbine downstream, and a combustion chamber or area, called the combustion chamber, between them. The basic operation of the gas turbine is similar to that of the steam turbine, except that the working fluid is air instead of water. Fresh atmospheric air flows through a compressor that carries it to a higher pressure. The energy is then added by spraying the 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 to the exhaust pressure, producing a shaft output in the process. The work of the turbine shaft is used to power the compressor and other devices such as an electric generator that can be coupled to the shaft. The energy that is not used for the shaft work comes out in the exhaust gases, so these have a high temperature or a high speed. The purpose of the gas turbine determines the design so that the most desirable form of energy is maximized. Gas turbines are used to power airplanes, trains, ships, electric generators, pumps, gas compressors and tanks.


In an ideal gas turbine, the gases are subjected to four thermodynamic processes: isentropic compression, isobaric combustion (constant pressure), isentropic expansion and heat rejection. Together, these form the Brayton cycle.

In a real gas turbine, mechanical energy irreversibly changes (due to internal friction and turbulence) in pressure and thermal energy when the gas is compressed (in a centrifugal or axial compressor). Heat is added to the combustion chamber and the specific volume of the gas increases, accompanied by a slight loss of pressure. During the expansion through the stator and rotor passages in the turbine, an irreversible energy transformation occurs again. Fresh air is drawn instead of heat rejection.

If the engine has a power turbine added to drive an industrial generator or a helicopter rotor, the outlet pressure will be as close to the inlet pressure as possible with sufficient energy to overcome pressure losses in the exhaust ducts and expel the exhaust. For a turboprop engine, there will be a particular balance between the power of the propeller and the thrust of the jet, which gives the most economical operation. In a jet engine, only enough pressure and energy is drawn from the flow to drive the compressor and other components. The remaining high pressure gases are accelerated to provide a jet to propel an aircraft.

The smaller the motor, the greater the speed of rotation of the axis (s) to reach the tip velocity of the required blade. The speed of the blade tip determines the maximum pressure ratios that can be obtained by the turbine and the compressor. This, in turn, limits the maximum power and efficiency that can get the engine. In order for the tip speed to remain constant, if the diameter of a rotor is halved, the speed of rotation must be doubled. For example, large jet engines operate around 10,000 rpm, while micro-turbines spin as fast as 500,000 rpm.

Mechanically, gas turbines can be considerably less complex than internal combustion piston engines. Single turbines may have a main moving part, the compressor rotor / shaft / turbine assembly (see above), with other moving parts in the fuel system. However, the precision manufacturing required for components and the temperature-resistant alloys required for high efficiency often make the construction of a simple gas turbine more complicated than a piston engine.

More advanced gas turbines (such as those found in modern jet engines) can have 2 or 3 axles (reels), hundreds of compressor blades and turbines, mobile stator blades and extensive outer tubes for fuel systems, oil and air.

Thrust bearings and thrust bearings are a critical part of the design. They are hydrodynamic oil bearings or oil-cooled rolling element bearings. Reed bearings are used in some small machines such as micro turbines and also have a strong potential for use in small gas turbines / auxiliary power units.
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