Airfoil with cooling passage network having flow guides

A gas turbine engine comprising:

• a compressor section;
• a combustor in fluid communication with the compressor section;
• and
• a turbine section in fluid communication with the combustor,
• the turbine section having a turbine airfoil that includes
• an airfoil section having an airfoil wall defining a leading end, a trailing end, and first and second sides joining the leading end and the trailing end, the first and second sides spanning in a longitudinal direction between first and second ends, the airfoil wall circumscribing an internal core cavity, and
• a cooling passage network embedded in the airfoil wall between inner and outer portions of the airfoil wall, the cooling passage network having an entrance region adjacent the first end of the airfoil section, a plenum region between the entrance region and the second end of the airfoil section, and an exit region adjacent the plenum region, the entrance region including a plurality of flow guides dividing the entrance region into a plurality of channels opening into the plenum region, each of the flow guides having a distinct shape among the plurality of flow guides, the flow guides defining flow guide lengths in the longitudinal direction and the flow guide lengths differ from each other, and the plenum region including a plurality of pedestals having a shape different from the flow guides.

An airfoil comprising:

• an airfoil section having an airfoil wall defining a leading end, a trailing end, and first and second sides joining the leading end and the trailing end, the first and second sides spanning in a longitudinal direction between first and second ends, the airfoil wall circumscribing an internal core cavity;
• first and second platforms having, respectively, first and second platform plenums;
• and
• a cooling passage network embedded in the airfoil wall between inner and outer portions of the airfoil wall, the cooling passage network having an entrance region including an inlet that opens to the first platform plenum and receives cooling air there from, a plenum region between the entrance region and the second end of the airfoil section, and an exit region including an outlet that opens to the second platform plenum to discharge the cooling air thereto, the entrance region including a plurality of flow guides dividing the entrance region into a plurality of channels opening into the plenum region, and the plenum region including a plurality of pedestals having a shape different from the flow guides.