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Gas turbine engines are primarily controlled by the amount of fuel supplied to the combustion chambers.With this in mind we can say that, the very simplest fuel control for a turbine engine is a fuel valve operated by the pilot.
Active clearance control (ACC) is a method used in large aircraft gas turbines to improve fuel efficiency during cruise. This is achieved by setting the turbine tip clearance at more than one operating point and contrasts with passive clearance control which sets it for only one condition and is explained below.
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 ...
However, the more critical inlet control was digital on the production aircraft. [4] Digital electronic control followed. In 1968, Rolls-Royce and Elliott Automation, in conjunction with the National Gas Turbine Establishment, worked on a digital engine control system that completed several hundred hours of operation on a Rolls-Royce Olympus Mk ...
The SAC turbine has one single concentric ring where the DLE turbine has two or three rings with premixers depending on gas turbine type. [2] DLE technology demands an advanced control system with a large number of burners.
An inlet air cooling system installed in a desert-dry area to increase turbine power output. Turbine inlet air cooling is a group of technologies and techniques consisting of cooling down the intake air of the gas turbine. The direct consequence of cooling the turbine inlet air is power output augmentation.
Bleed air in aerospace engineering is compressed air taken from the compressor stage of a gas turbine, upstream of its fuel-burning sections.Automatic air supply and cabin pressure controller (ASCPC) valves bleed air from low or high stage engine compressor sections; low stage air is used during high power setting operation, and high stage air is used during descent and other low power setting ...
Accessory Gearbox – bevel gears that extract 35 to 100 hp (26 to 75 kW) from the high-pressure spool to operate the fuel control unit, starter, oil pump, and vehicle hydraulic pump; Power Turbines – the first stage of the two-stage power turbine is driven by a variable-geometry nozzle to improve efficiency