公开(公告)号：US11193377B2

公开(公告)日：2021-12-07

申请号：US16695358

申请日：2019-11-26

Applicant: General Electric Company

Inventor： Aamir Shabbir ,  Christopher Robert Berndt ,  Andrew Breeze-Stringfellow

IPC: F01D5/12

Abstract: A method of controlling a transition from a laminar flow to a turbulent flow for an airfoil of a turbomachine includes forming an airfoil. The airfoil defines a span extending between a root and a tip and a chord extending between a leading edge and a trailing edge. The airfoil includes a suction side surface and a pressure side surface, opposite the suction side surface, each extending between the leading edge, the trailing edge, the root, and the tip. The method also includes finishing a majority of the suction and pressure side surfaces in order to form a finished surface. The finished surface defines a first roughness. The method additionally includes leaving at least a portion of the suction side surface and/or pressure side surface unfinished in order to form an unfinished surface. Furthermore, the unfinished surface defines a second roughness greater than the first roughness.

公开(公告)号：US20210156258A1

公开(公告)日：2021-05-27

申请号：US16695358

申请日：2019-11-26

Applicant: General Electric Company

Inventor： Aamir Shabbir ,  Christopher Robert Berndt ,  Andrew Breeze-Stringfellow

IPC: F01D5/12

Abstract: A method of controlling a transition from a laminar flow to a turbulent flow for an airfoil of a turbomachine includes forming an airfoil. The airfoil defines a span extending between a root and a tip and a chord extending between a leading edge and a trailing edge. The airfoil includes a suction side surface and a pressure side surface, opposite the suction side surface, each extending between the leading edge, the trailing edge, the root, and the tip. The method also includes finishing a majority of the suction and pressure side surfaces in order to form a finished surface. The finished surface defines a first roughness. The method additionally includes leaving at least a portion of the suction side surface and/or pressure side surface unfinished in order to form an unfinished surface. Furthermore, the unfinished surface defines a second roughness greater than the first roughness.