公开(公告)号：WO2015167604A1

公开(公告)日：2015-11-05

申请号：PCT/US2014/059508

申请日：2014-10-07

Applicant: VIRGINIA TECH INTELLECTUAL PROPERTIES, INC.

Inventor： ALEXANDER, William Nathan ,  DEVENPORT, William J. ,  CLARK, Ian A. ,  JAWORSKI, Justin W. ,  GLEGG, Stewart ,  PEAKE, Nigel ,  DALY, Conor

IPC: F03D1/00 ,  F03D1/06

CPC classification number: F03D1/0633 ,  F03D1/0675 ,  F05B2240/30 ,  F05B2260/962 ,  Y02E10/721

Abstract: The present invention relates to airfoils having surface treatments to reduce trailing edge noise. The surface treatment is designed to reduce trailing edge noise by modifying the boundary layer turbulence as it approaches the trailing edge. The surface treatment accomplishes its function by breaking up spanwise-oriented turbulence approaching the trailing edge, thereby reducing the spanwise correlation lengthscales; deflecting the boundary layer turbulence away from the edge; and/or creating spanwise vortices or instability waves to reduce the turbulence-edge interaction.

Abstract translation: 本发明涉及具有减少后缘噪声的表面处理的翼型件。 表面处理设计成通过在接近尾缘时修改边界层湍流来减少后缘噪声。 表面处理通过分解接近尾缘的翼展方向湍流来实现其功能，从而降低翼展方向相关长度尺度; 使边界层的湍流偏离边缘; 和/或创建展开式涡旋或不稳定性波以减少湍流 - 边缘相互作用。