Patent attributes
An turbine airfoil and a process for near wall cooling of a turbine airflow with low flow in which the airfoil is formed by a main spar that forms the support structure for the airfoil and forms a series of cooling air collecting chambers extending from the leading edge region to the trailing edge region of the airfoil. A thermal skin forms an outer airfoil surface and also forms a series of pressure side and suction side impingement chambers along the airfoil walls. A cooling air supply chamber is formed by the spar in the leading edge region and supplies the cooling air for the airfoil. A series of leading edge impingement chambers are formed along the leading edge and carry the cooling air from the supply chamber to the series of collection chambers and impingement chambers downstream. The spent cooling air is then collected in a trailing edge collecting chamber and discharged through a row of exit holes.