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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 that the combustion generates a high-temperature flow; this high-temperature pressurized gas enters a ...
A compressor map is a chart which shows the performance of a turbomachinery compressor. This type of compressor is used in gas turbine engines, for supercharging reciprocating engines and for industrial processes, where it is known as a dynamic compressor. A map is created from compressor rig test results or predicted by a special computer program.
Unlike a compressor or fan, surge or stall does not occur in a turbine. This is because the gas flows through the turbine in its natural direction, from high to low pressure. As a result, there is no surge line marked on a turbine map. Working lines are difficult to see on a conventional turbine map because the speed lines bunch up.
The performance of a gas turbine, its efficiency and the generated power output strongly depend on the climate conditions, which may decrease the output power ratings by up to 40%. [4] To operate the turbine at ISO conditions [5] and recover performance, several inlet air cooling systems have been promoted.
Figure 5.1 – Illustration of the Brayton cycle as applied to a gas turbine Figure 5.2 – Example centrifugal compressor performance map. While illustrating a gas turbine's Brayton cycle, [15] Figure 5.1 includes example plots of pressure-specific volume and temperature-entropy. These types of plots are fundamental to understanding ...
The General Electric LM6000 is a turboshaft aeroderivative gas turbine engine. The LM6000 is derived from the CF6-80C2 aircraft turbofan.It has additions and modifications designed to make it more suitable for marine propulsion, industrial power generation, and marine power generation use.
The relevance for gas turbine-powered aircraft is the use of a secondary jet of air with a propeller or, for jet engine performance, the introduction of the bypass engine. The overall efficiency of the jet engine is thermal efficiency multiplied by propulsive efficiency ( η o = η t h η p r {\displaystyle \eta _{o}=\eta _{th}\eta _{pr}} ).
Free-piston engine used as a gas generator to drive a turbine. A free-piston engine is a linear, 'crankless' internal combustion engine, in which the piston motion is not controlled by a crankshaft but determined by the interaction of forces from the combustion chamber gases, a rebound device (e.g., a piston in a closed cylinder) and a load device (e.g. a gas compressor or a linear alternator).