公开(公告)号：US20150344126A1

公开(公告)日：2015-12-03

申请号：US14760278

申请日：2014-01-13

Applicant: SINGAPORE TECHNOLOGIES AEROSPACE LTD

Inventor： Keen Ian CHAN

IPC: B64C11/00 ,  B64C27/20 ,  F15D1/02

CPC classification number: B64C11/001 ,  B64C27/20 ,  F15D1/02

Abstract: Various embodiments provide a method for improving crosswind stability of a propeller duct. The method comprises defining an initial duct section based on a predetermined airfoil section having an initial value of a geometric parameter such that the geometric parameter of a portion of the initial duct section has the initial value. The method also comprises determining fluid flow paths around the initial duct section when subject to a crosswind having a predetermined crosswind speed. The method further comprises varying the initial value of the geometric parameter of the initial duct section to a threshold value which causes separation of fluid flow paths at a windward side of the initial duct section at and above the predetermined crosswind speed to form an improved duct section. Various embodiments provide a corresponding apparatus, system and/or computer readable medium.

Abstract translation: 各种实施例提供了一种用于改善螺旋桨管道的侧风稳定性的方法。 该方法包括基于具有几何参数的初始值的预定翼型部分限定初始管道段，使得初始管道段的一部分的几何参数具有初始值。 该方法还包括当经受具有预定侧风速度的侧风时，确定围绕初始管道段的流体流动路径。 该方法还包括将初始管道部分的几何参数的初始值改变为阈值，该阈值导致初始管道部分的迎风侧处的流体流动路径在预定侧风速度和高于预定侧风速度时分离，以形成改进的管道部分 。 各种实施例提供了相应的装置，系统和/或计算机可读介质。