The turbocharger consists of a single-stage impulse turbine connected to a centrifugal impeller via a shaft.
The turbine works by the engine exhaust gas, which enters via the gas inlet casing. The gas expands through a nozzle ring where the pressure energy of the gas converts to kinetic energy. This high-velocity gas is directed onto the turbine blades where it drives the turbine wheel, and thus the compressor at high speed (10-15000 rpm).
The exhaust gas then passes through the outlet casing to the exhaust uptake. On the airside, the air goes in through litters and enters the compressor wheel axially where it accelerates to high velocity.
The air exits the impeller radially and passes through a diffuser. From that, some of the kinetic energy converts to pressure energy. The air passes to the volute casing where a further energy Conversion takes place. The air gets cool before passing to the engine inlet manifold or scavenge air receiver.