Dynamic viscous damping of the turbine output power train is used to control the rotational speed of the turbine.

Thus, the responsiveness to a turbine output command can be improved.

A turbine exhaust case has an outer housing to be secured within a gas turbine engine and a central hub.

A turbine for an exhaust gas turbocharger comprises a turbine housing (1) containing a spiral bypass channel (8) which runs parallel to the spiral turbine channel (3) and surrounds the turbine outlet (5).

The valve flap (6) is opened and closed to short gas flowing in the turbine entrance side passage (3), to the turbine exit side passage (4).

Control strategies to utilize the charge flow as a lever to control turbine outlet temperature are disclosed.

A turbine exhaust case (28) for a gas turbine engine (10) comprises a frame (100), a vane fairing (108), a heat shield (124, 126, 128), and a serpentine cooling path.

An output of the fourth pump, an output of the third turbine, and an output of the fourth turbine are connected to the combustion chamber.

An output port (21) of the turbine B (20) is communicated with an output port of the electronic pressure valve (14), an input port (19) of the turbine B (20) is communicated with the output port (16) of the turbine A (17).

An outlet (33) is in air flow communication with the impeller housing (15), wherein air from the impeller is expelled through the outlet (33).

The turbine drives an output shaft, and the output shaft drives at least four gears.

The fluid outlet tube has at least one outlet turbine generator disposed therein.

An output of the gas generator is connected to the first turbine and the second turbine.

The outlet directs air away from the impeller.

Dynamic viscous damping of the turbine output power train is used to control the rotational speed of the turbine.