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A method of fabricating a test model of a gas turbine engine combustor dome, and the test model produced thereby. The method entails individually stamping a plurality of dome wall segments and first and second mounting band segments. Each wall segment comprises at least one cup between radially inwa

A method of fabricating a test model of a gas turbine engine combustor dome, and the test model produced thereby. The method entails individually stamping a plurality of dome wall segments and first and second mounting band segments. Each wall segment comprises at least one cup between radially inward and outward edges of the wall segment, and an opening in the cup. At least one wall segment and its two corresponding mounting band segments are placed on a fixture that locates the opening of the wall segment, locates the first and second mounting band segments at the radially-inward and outward edges of the wall segment, and orients the wall segment to establish a dome angle of the fixtured dome assembly. The wall segment and mounting band segments are then joined while the fixtured dome assembly remains on the fixture to form at least a unitary sector of the test model.

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1. A method of fabricating a test model of a dome for a gas turbine engine combustor, the method comprising the steps of:stamping a plurality of dome wall segments, each dome wall segment comprising an arcuate radially-inward edge, an arcuate radially-outward edge, at least one cup between the radia

1. A method of fabricating a test model of a dome for a gas turbine engine combustor, the method comprising the steps of:stamping a plurality of dome wall segments, each dome wall segment comprising an arcuate radially-inward edge, an arcuate radially-outward edge, at least one cup between the radially inward and outward edges, and an opening in the cup; stamping a plurality of arcuate-shaped first mounting band segments and a plurality of arcuate-shaped second mounting band segments; placing at least one of the dome wall segments and at least one of each of the first and second mounting band segments on a fixture to form a fixtured dome assembly, the fixture comprising means for locating the opening of the at least one dome wall segment relative to the fixture, means for locating each of the at least one first mounting band segment at the radially-inward edge of the at least one dome wall segment, means for locating each of the at least one second mounting band segment at the radially-outward edge of the at least one dome wall segment, and means for orienting the at least one dome wall segment to establish a dome angle of the fixtured dome assembly; and then joining the at least one dome wall segment and the at least one first and second mounting band segments while the fixtured dome assembly remains on the fixture to form at least a unitary sector of a dome test model. 2. A method according to claim 1, further comprising the step of joining a plurality of unitary sectors to form a unitary dome test model.3. A method according to claim 2, wherein the step of joining a plurality of unitary sectors comprises a welding operation.4. A method according to claim 1, wherein the joining step comprises joining one of the dome wall segments and one of each the first and second mounting band segments to form the unitary sector.5. A method according to claim 4, further comprising the step of joining a plurality of unitary sectors together to form a unitary dome test model.6. A method according to claim 1, wherein the joining step comprises joining a plurality of the dome wall segments and a plurality of the first and second mounting band segments to form the unitary sector.7. A method according to claim 6, further comprising the step of joining a plurality of unitary sectors together to form a unitary dome test model.8. A method according to claim 1, wherein the joining step comprises joining a plurality of the dome wall segments and a plurality of the first and second mounting band segments to yield a unitary dome test model at the completion of the joining step.9. A method according to claim 1, wherein the joining step comprises:welding a plurality of the dome wall segments together, welding a plurality of the first mounting band segments and welding a plurality of the second mounting band segments together; and then brazing the welded dome wall segments to the welded first and second mounting band segments to form the unitary sector. 10. A method according to claim 9, further comprising the step of performing a stress-relieving heat treatment between the welding and brazing steps.11. A method according to claim 1, wherein the fixture comprises a baseplate, and the means for locating the opening comprises a cylindrical member attached to the baseplate and sized to center the opening.12. A method according to claim 1, wherein the fixture comprises a baseplate, and the means for locating the second mounting band segments and the means for establishing the dome angle comprises blocks attached to the baseplate.13. A method according to claim 1, wherein the dome wall segments, the first and second mounting band segments, and the fixture are formed of the same material.14. A method according to claim 1, further comprising the step of conducting a developmental test on the dome test model.15. A method of fabricating a test model of a dome for a gas turbine engine combustor, the method comprising the steps of:stamping a plurality of dome wall segments, each dome wall segment comprising an arcuate radially-inward flange, an arcuate radially-outward flange, a single cup between the radially inward and outward flanges, and a single opening in the cup; stamping a plurality of arcuate-shaped first mounting band segments and a plurality of arcuate-shaped second mounting band segments; providing a fixture comprising a baseplate, a plurality of cylindrical members attached and oriented at an angle to a first surface of the baseplate, a plurality of blocks and gussets attached to the first surface of the baseplate, the baseplate, the cylindrical members, the blocks and the gussets being formed of the same material; placing more than one of the dome wall segments and more than one of each of the first and second mounting band segments on the fixture to form a fixtured dome assembly, the openings of the dome wall segments being located on the fixture with the cylindrical members, the blocks, the gussets and the first surface of the baseplate cooperating to locate the first mounting band segments at the radially-inward flanges of the dome wall segments and the second mounting band segments at the radially-outward flanges of the dome wall segments, and to orient the dome wall segments to establish a dome angle of the fixtured dome assembly; tack welding the dome wall segments to the cylindrical members and the blocks and the gussets to the first and second mounting band segments; welding adjacent dome wall segments together, welding adjacent first mounting band segments together, and welding adjacent second mounting band segments together while the fixtured dome assembly remains on the fixture; and then brazing each of the first and second mounting band segments to their respective dome wall segments while the fixtured dome assembly remains on the fixture to form a unitary sector of a dome test model. 16. A method according to claim 15, further comprising the step of stress relieving the dome wall segments and the first and second mounting band segments following the welding step and while the fixtured dome assembly remains on the fixture.17. A method according to claim 15, wherein the dome wall segments, the first and second mounting band segments, and the fixture are formed of the same material.18. A method according to claim 15, wherein the dome wall segments, the first and second mounting band segments, and the fixture are formed of a superalloy.19. A method according to claim 15, further comprising the step of conducting a developmental test on the dome test model.20. A unitary test model of a dome for a gas turbine engine combustor, the unitary test model comprising:a plurality of individually-stamped dome wall segments, each dome wall segment comprising an arcuate radially-inward flange, an arcuate radially-outward flange, at least one cup between the radially inward and outward flanges, and an opening in the cup; a plurality of individually-stamped arcuate-shaped first mounting band segments, each of the first mounting band segments being joined to the radially-inward flange of a corresponding one of the dome wall segments; and a plurality of individually-stamped arcuate-shaped second mounting band segments, each of the second mounting band segments being joined to the radially-outward flange of a corresponding one of the dome wall segments. 21. A unitary test model according to claim 20, wherein the first and second mounting band segments are brazed to the dome wall segments.22. A unitary test model according to claim 20, wherein adjacent dome wall segments are welded together, adjacent first mounting band segments are welded together, and adjacent second mounting band segments are welded together.23. A unitary test model according to claim 20, wherein the dome wall segments and the first and second mounting band segments are formed of the same material.24. A unitary test model according to claim 20, wherein the dome wall segments and the first and second mounting band segments are formed of a superalloy.25. A unitary test model according to claim 20, wherein each of the dome wall segments comprises a single cup and a single opening in the cup.