Nested channel ducts for nozzle construction and the like

A multiple conduit system for a gas turbine engine, the multiple conduit system extending between a plurality of conduit inlet and outlets, the system comprising:

• a channel formed in a surface of a gas turbine engine component, the channel having a length and defining at least one shoulder therein along the length, the shoulder corresponding to a change in width of the channel, the channel being adapted for conveying a fluid flow from an inlet to an outlet;
• at least a first sealing member disposed within the channel and mounted to the shoulder substantially along said length, the first sealing member dividing the channel into at least a first discrete conduit and a second discrete conduit;
• and
• a second sealing member enclosing the channel substantially alone its length to define the second discrete conduit;
• whereby the first and second discrete conduits are each adapted to direct an independent fluid flow from respective inlets to respective outlets.

A method of manufacturing a gas turbine engine fuel nozzle having multiple discrete fuel conduits for directing independent fuel flows from a fuel source to a spray tip assembly, the method comprising:

• providing a fuel-conveying member;
• providing a channel in a surface of the fuel-conveying member;
• providing a shoulder in the channel along a length of the channel, the shoulder corresponding to a change in width of the channel;
• fixing at least a first sealing member into the channel against the shoulder substantially along said length to divide the channel into a first discrete fuel conduit and a second discrete fuel conduit;
• and fixing a second sealing member to the fuel-conveying member substantially along said length to enclose the channel and thereby define the second discrete fuel conduit.

A gas turbine engine fuel nozzle system having a spray tip assembly in flow communication with a fuel source, the fuel nozzle system comprising:

• a fuel-conveying member comprising a channel formed in a peripheral surface thereof and-defining an opening in the peripheral surface;
• at least a first inner sealing member receivable within the channel, the first inner sealing member being mounted therewithin substantially along the channel to sealingly divide the channel into nested primary and secondary discrete conduits, the primary discrete conduit being defined between a bottom of the channel and the inner sealing member and being narrower than the secondary conduit;
• an outer sealing member fastenable to the fuel-conveying member for enclosing the channel;
• and
• whereby each discrete conduit is adapted for directing fuel flow from the fuel source to the spray tip assembly.

A multiple conduit system for a gas turbine engine, the multiple conduit system extending between a plurality of conduit inlet and outlets, the system comprising:

• a channel formed in a peripheral surface of a gas turbine engine fluid-conveying component, the channel defining an opening in the peripheral surface;
• at least a first inner sealing member receivable within the channel, the first inner sealing member being mounted therewithin substantially along the channel to sealingly divide the channel into nested first and second discrete conduits, the first discrete conduit being defined between a bottom of the channel and the first inner sealing member and being narrower than the second conduit;
• an outer sealing member fastenable to the fluid-conveying component for enclosing the channel;
• and
• the first and second discrete conduits each providing independent fluid flow communication from the respective inlets to the respective outlets.

A method of manufacturing a gas turbine engine fuel assembly having multiple discrete fuel conduits for directing independent fuel flows from a fuel source to a spray tip assembly, the method comprising:

• providing a fuel-conveying member;
• forming a channel in a peripheral surface of the fuel-conveying member, the channel defining an opening in a peripheral surface;
• inserting at least a first inner sealing member into the channel through the opening, and mounting the inner sealing member within the channel substantially alone a length of the channel to sealingly divide the channel into nested first and second discrete fuel conduits;
• and
• mounting an outer sealing member to the fuel-conveying member to enclose the channel substantially along a length of the channel, the first discrete fuel conduit being defined between a bottom of the channel and the inner sealing member.