Gas turbine system and method of operating a gas turbine

A supercharging system 11 for a gas turbine system 13 includes a compressor 21, a combustor 23, a turbine 25 and a shaft 27. The supercharging system 11 includes a fan assembly 39 that provides an air stream and a torque converter 46 coupled to the shaft 27 and the fan assembly 39. The supercharging system 11 also includes a subsystem for conveying a first portion of the air stream output to the compressor 21; and a bypass subsystem 59 for optionally conveying a second portion of the air stream output to other uses.