The United Engine Corporation (UEC) in its Telegram channel explained the principle of operation of the turbine in the latest PD-14 gas turbine engine for the MS-21 aircraft. In turbojet power plants, single- and two-stage axial gas turbines are the most widely used.
The term "axial" indicates that the gas flow is supplied to the turbine blades parallel to the axis of rotation of the bladed wheel.
The turbine blades convert the internal energy of the expanding gas exiting the combustion chamber into mechanical work on the shaft. Through the shaft, the turbine rotates the compressor and ensures the operation of the engine's gas generator, as well as engine accessories.
A turbine stage consists of a rotor and a nozzle guide vane. The nozzle guide vane blades are part of the stator; they turn the flow of working fluid exiting the combustion chamber to give it the optimal angle of attack relative to the rotor blades. The rotor blades convert the energy of the flow into mechanical energy, transferring motion from the rotor to the shaft.
Turbine blades are subjected to powerful centrifugal and centripetal forces. The rotational speed of the bladed wheels reaches 60,000 rpm, and the temperature of the gas flow reaches 2000 degrees Kelvin. Therefore, turbine blades are made of heat-resistant alloys and have complex cooling systems.
Earlier www1.ru reported that Rostec showed a detailed video of the flight of the "Superjet" with PD-8 at an extreme speed.
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