Fuel supply system

A fuel supply system comprising:

• a main fuel line path configured to route a fuel to a combustion inlet region;
• a secondary fuel line path fluidly coupled to the main fuel line path, the secondary fuel line path having a fluid chamber, the fluid chamber having an inlet and an outlet;
• a piston disposed within the fluid chamber and cyclically translatable between a first position and a second position;
• an obstruction member disposed within an orifice extending between the fluid chamber and the main fuel line path, the obstruction member operatively coupled to the piston and moveable into the main fuel line path in response to translation of the piston, wherein the first position of the piston provides a first cross-sectional area of the main fuel line path and the second position of the piston provides a second cross-sectional area of the main fuel line path that is less than the first cross-sectional area;
• a first segment of the secondary fuel line path routing fuel from the main fuel line path to the inlet of the fluid chamber;
• and
• a second segment of the secondary fuel line path routing fuel from the outlet of the fluid chamber to the main fuel line path at a location downstream from the first segment.

A gas turbine system comprising:

• a compressor;
• a combustion assembly having at least one combustion chamber;
• a turbine section;
• and
• a fuel supply system configured to route fuel to the combustion assembly, the fuel supply system comprising:
• a main fuel line path configured to route a fuel to a combustion inlet region;
• a secondary fuel line path fluidly coupled to the main fuel line path and configured to divert a portion of the fuel from the main fuel line path through a first segment of the secondary fuel line path and return the fuel to the main fuel line path through a second segment of the secondary fuel line path;
• and
• an obstruction mechanism located proximate the main fuel line path at an obstruction location, the obstruction mechanism configured to cyclically translate into the main fuel line path to cyclically alter a cross-sectional area of the main fuel line path.