HEAT SHIELD ELEMENT FOR A GAS TURBINE

摘要

Heat shield element (HS) for a gas turbine (GT) comprising an areal wall section (WS), said wall section (WS) being defined by limiting edges of the heat shield element (HS), and having a defined thickness (TH) extending radially from an inner surface (IS) to an outer surface (OS) said inner surface (IS) is exposed to a hot gas path (HGP) and said outer surface (OS) is exposed to a coolant (CO). To improve cooling efficiency, cooling channels (CC) are provided through the wall of said wall section (WS) said cooling channels (CC) comprising a first section (SI) starting at the inner surface (IS), further comprising a second section (S2) extending between the inner surface (IS) and the outer surface (OS) along a length of at least three times the thickness (TH) of the wall section (WS) at that specific area of the second section and comprising a third section (S3) joining the hot gas path so that said cooling channels (CC) connect said cavity (CV) with the hot gas path (HGP).