free power turbine

free power turbine

free power turbine
An arrangement in which a turbine, or stage of turbines, in a gas turbine engine does not drive the compressor. Free turbines are used to drive the reduction gears for the propeller in a turboprop engine or the transmission and rotor of a helicopter. Also known as a power turbine or a free turbine. In a turbine engine, a turbine wheel drives the output shaft and is not connected to the shaft driving the compressor.
References in periodicals archive ?
According to GE, the LMS100-PB is the largest aeroderivative gas turbine available with a free power turbine, ideally positioning it for large LNG applications.
Engineers from EGT increased the compressor and high-pressure stages, and added a free power turbine to their proven Tempest gas turbine to create a train shaft engine with a simple-cycle efficiency exceeding 35 percent.