US Patent 11313238 Turbine blade including pin-fin array

A turbine blade includes a blade extending from a platform to a free end and having an airfoil-shaped cross section, the blade including a leading edge, a trailing edge, a pressure side extending from the leading edge to the trailing edge, and a suction side extend-ing from the leading edge to the trailing edge, one or more internal cooling passages through which cooling air flows, a trailing edge slot formed along the trailing edge and con-nected to the internal cooling passage, and a pin-fin array including a plurality of pin-fins positioned in the internal cooling passage connected to the trailing edge slot, each pin-fin including a main body and chamfered or filleted portions respectively connected to the pressure side and the suction side at respective ends of the main body, wherein among the pin-fins of the pin-fin array, a portion of the pin-fins have relatively large chamfered or filleted portions as compared with remaining pin-fins.