A coolable component for a streaming engine providing an improved cooling, wherein the coolable component includes an outer wall providing an outer surface adapted to be in contact with a hot fluid like a hot gas stream used in the streaming engine or to be coated with a coating that is adapted to be in contact with the hot fluid, wherein the outer surface is at least partially curved. The coolable component includes at least one cooling channel inside the outer wall adapted to guide a cooling fluid through the cooling channel to cool the outer wall during operation of the streaming engine, wherein the cooling channel is adapted to provide a convection cooling of the outer surface.