System and method for flow control in turbine

A system, comprising:

• a turbine comprising a main flow path, a plurality of turbine blades and at least one shaft disposed along the main flow path, at least one flow control area disposed along the main flow path, and at least one fluid injection port fluidly coupled to the main flow path;
• and
• a fluid supply system fluidly coupled to the at least one fluid injection port, wherein the fluid supply system is configured to couple to a plurality of waste heat sources, and the fluid supply system is configured to selectively use one or more waste heat sources of the plurality of waste heat sources to supply a fluid to the at least one fluid injection port to adjust an effective area of the at least one flow control area.