Cooling channel for cooling a hot gas guiding component

A cooled combustion chamber, comprising:

• a combustion space arranged within the combustion chamber;
• a burner arranged within the combustion space that admits a fuel to be combusted in the combustion space to produce a hot combustion gas;
• and
• a cooling channel arranged within the combustion chamber that defines the combustion space and having:
• a plurality of channel walls having a downstream and an upstream side with respect to the direction of coolant flow where a first channel wall is operatively exposed to the hot combustion gas, a second channel wall is disposed opposite the first channel wall, and side walls, each spanning from the first channel wall to the second channel wall;
• and
• a plurality of inlet apertures arranged in a plurality of rows around the perimeter of at least the second channel wall for the inlet of the coolant to the cooling channel at the upstream side, wherein the plurality of rows are arranged in the direction of flow, wherein the plurality of inlet apertures are axially aligned with the cooling channel and radially outward of the first channel wall, wherein the inlet apertures vary in size and/or shape among themselves within at least one segment of the cooling channel, wherein the inlet apertures are effective to reduce a secondary flow within the flow and proximate the side walls, wherein each inlet aperture comprises an aperture entry and an aperture exit, and wherein at the upstream side the cooling channel terminates at an end wall disposed upstream of the aperture exits and joining the first channel wall, the second channel wall, and the side walls such that the inlet apertures supply all coolant for the coolant flow in the cooling channel.

A gas turbine engine, comprising:

• a rotor arranged along a rotational axis of the turbine;
• a compressor arranged coaxially with the rotor that inlets a working fluid and produces a compressed working fluid;
• a combustion chamber arranged downstream of the compressor that receives the compressed working fluid and comprises:
• a combustion space arranged within the combustion chamber,
• a burner arranged within the combustion space that admits a fuel to be combusted in the combustion space to produce a hot combustion gas, and
• a cooling channel arranged within the combustion chamber that defines the combustion space and having:
• a plurality of channel walls having a downstream and an upstream side with respect to the direction of coolant flow where a first channel wall is operatively exposed to the hot combustion gas, a second channel wall is disposed opposite the first channel wall, and side walls each spanning from the first channel wall to the second channel wall;
• and
• a plurality of inlet apertures arranged in a plurality of rows around the perimeter of at least the second channel wall for the inlet of the coolant to the cooling channel at the upstream side, wherein the plurality of rows are arranged in the direction of flow, wherein the plurality of inlet apertures are axially aligned with the cooling channel and radially outward of the first channel wall, wherein the inlet apertures vary in size and/or shape among themselves within at least one segment of the cooling channel, wherein the inlet apertures are effective to reduce a secondary flow within the flow and proximate the side walls, wherein each inlet aperture comprises an aperture entry and an aperture exit, and wherein at the upstream side the cooling channel terminates at an end wall disposed upstream of the aperture exits and joining the first channel wall, the second channel wall, and the side walls such that the inlet apertures supply all coolant for the coolant flow in the cooling channel
• a turbine arranged downstream of the combustion chamber that receives and expands the hot combustion gas to produce mechanical energy.