A gas turbine engine combustor, comprising: an inner liner having an upstream end and a downstream end, the inner liner extending in an axial direction between the upstream and downstream ends; a dual wall outer liner having a hot wall, a cold wall at least partially surrounding the hot wall, an upstream end, and a downstream end, the outer liner extending in the axial direction between the upstream and downstream ends, the outer liner being spaced apart from, and at least partially surrounding, the inner liner; a dome assembly coupled between the upstream ends of the inner and outer liners (202, 204) to define a combustion chamber between the inner liner and the hot wall of the outer liner; one or more rows of dilution openings (232, 234) extending through the hot wall and the cold wall and configured to admit combustion air into the combustion chamber; and a plurality of rows of effusion cooling holes disposed in the hot wall and configured to direct at least a portion of the cooling air through the hot wall onto an inner surface of the hot wall, the plurality of rows of effusion cooling holes including a first set of effusion cooling holes and a second set of effusion cooling holes, wherein the first set of effusion cooling holes includes a first row of effusion cooling holes disposed at a tangential angle of about 90° relative to the axial direction, and a second row of effusion cooling holes disposed at a tangential angle of about 0° relative to the axial direction, the second row of effusion cooling holes being downstream of the first row of effusion cooling holes and being generally aligned in a circumferential direction with the one or more rows of dilution openings, and wherein the second set of effusion cooling holes includes a third row of effusion cooling holes disposed at a tangential angle of about 90° relative to the axial direction and arranged immediately downstream of the one or more rows of dilution openings, and a fourth row of effusion cooling holes, characterized in that a plurality of impingement holes is arranged in the cold wall of the outer liner allowing cooling air to flow through the cold wall to the hot wall; and the fourth row of effusion cooling holes is disposed at a tangential angle of about 0° relative to the axial direction and arranged downstream of the third row of effusion cooling holes. an inner liner having an upstream end and a downstream end, the inner liner extending in an axial direction between the upstream and downstream ends; a dual wall outer liner having a hot wall, a cold wall at least partially surrounding the hot wall, an upstream end, and a downstream end, the outer liner extending in the axial direction between the upstream and downstream ends, the outer liner being spaced apart from, and at least partially surrounding, the inner liner; a dome assembly coupled between the upstream ends of the inner and outer liners (202, 204) to define a combustion chamber between the inner liner and the hot wall of the outer liner; one or more rows of dilution openings (232, 234) extending through the hot wall and the cold wall and configured to admit combustion air into the combustion chamber; and a plurality of rows of effusion cooling holes disposed in the hot wall and configured to direct at least a portion of the cooling air through the hot wall onto an inner surface of the hot wall, the plurality of rows of effusion cooling holes including a first set of effusion cooling holes and a second set of effusion cooling holes, wherein the first set of effusion cooling holes includes a first row of effusion cooling holes disposed at a tangential angle of about 90° relative to the axial direction, and a second row of effusion cooling holes disposed at a tangential angle of about 0° relative to the axial direction, the second row of effusion cooling holes being downstream of the first row of effusion cooling holes and being generally aligned in a circumferential direction with the one or more rows of dilution openings, and wherein the second set of effusion cooling holes includes a third row of effusion cooling holes disposed at a tangential angle of about 90° relative to the axial direction and arranged immediately downstream of the one or more rows of dilution openings, and a fourth row of effusion cooling holes, characterized in that a plurality of impingement holes is arranged in the cold wall of the outer liner allowing cooling air to flow through the cold wall to the hot wall; and the fourth row of effusion cooling holes is disposed at a tangential angle of about 0° relative to the axial direction and arranged downstream of the third row of effusion cooling holes.