Impingement panel for a turbomachine

An integrated combustor nozzle, comprising:

• a combustion liner extending radially 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 holes that direct coolant in discrete jets towards the exterior surface of the one of the inner liner segment or the outer liner segment, wherein the impingement panel is radially spaced from the exterior surface to form a cooling flow gap therebetween;
• a collection duct defining a collection passage;
• and
• an inlet portion extending from the impingement plate to the collection duct such that the collection duct is spaced apart from the impingement plate, and wherein the inlet portion provides for fluid communication between the cooling flow gap and the collection passage.

A turbomachine comprising:

• a compressor;
• a compressor discharge casing disposed downstream from the compressor;
• a turbine disposed downstream from the compressor discharge casing;
• and
• an annular combustion system disposed within the compressor discharge casing, the annular combustion system including a plurality of integrated combustor nozzles disposed in an annular array about an axial centerline of the turbomachine, wherein each integrated combustor nozzle comprises:
• a combustion liner extending radially 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 holes that direct coolant in discrete jets towards the exterior surface of the one of the inner liner segment or the outer liner segment, and wherein the impingement panel is radially spaced from the exterior surface to form a cooling flow gap therebetween;
• a collection duct defining a collection passage;
• and
• an inlet portion extending from the impingement plate to the collection duct such that the collection duct is spaced apart from the impingement plate, and wherein the inlet portion provides for fluid communication between the cooling flow gap and the collection passage.