Impingement panel support structure and method of manufacture

An integrated combustor nozzle comprising:

• a combustion liner extending along a radial direction between an inner liner segment and an outer liner segment, the combustion liner including a forward end portion, an aft end portion, a first side wall, and a second side wall, the aft end portion of the combustion liner defining a turbine nozzle;
• and
• an impingement panel comprising:
• an impingement plate disposed along an exterior surface of one of the inner liner segment or the outer liner segment, wherein the impingement plate defines a plurality of impingement apertures that direct coolant in discrete jets towards the exterior surface of the one of the inner liner segment or the outer liner segment;
• a collection duct spaced apart from the impingement plate and defining a collection passage;
• an inlet portion extending from the impingement plate to the collection duct;
• and
• at least one support coupled to the impingement plate and at least one of the inlet portion and the collection duct.

A method for fabricating an impingement panel, comprising:

• (a) irradiating a layer of powder in a powder bed to form a fused region, the powder bed disposed on a build plate;
• (b) providing a subsequent layer of powder over the powder bed by passing a recoater arm over the powder bed from a first side of the powder bed;
• and
• (c) repeating steps (a) and (b) until the impingement panel is formed on the build plate, wherein the impingement panel comprises:
• an impingement plate defining a plurality of impingement apertures;
• a collection duct spaced apart from the impingement plate and defining a collection passage;
• an inlet portion extending from the impingement plate to the collection duct;
• and
• at least one support coupled to the impingement plate and at least one of the inlet portion and the collection duct.