Method and apparatus to control part-load performance of a turbine

A method of controlling the part-load performance of a turbine (1) includes generating a bypass flow in the turbine (1) by removing a portion of a compressed fluid from a compressor (10) of the turbine (1), determining an operating load of the turbine (1), transmitting the bypass flow to a turbine section (30) of the turbine (1); and selectively heating the bypass flow according to the determined operating load of the turbine (1).