Title:
AEROFOIL
Document Type and Number:
Japanese Patent JPS63170195
Kind Code:
A
Abstract:
An airfoil (400) has a plurality of spaced apart, U-shaped troughs (408,410) in either or both its suction or pressure surface (402,404) in the trailing edge region. Each trough (408,410) extends in a direction generally parallel to the bulk fluid flow in its vicinity near the airfoil surface and has an outlet at the trailing edge (406). The troughs (408,410) increase in depth from their inlets toward their outlets, the maximum depth being no more than half the trailing edge thickness. The troughs (408,410) are spaced apart, sized and configured to flow full over their entire length and to cause fluid to flow into the space immediately behind the trailing edge (406), thereby reducing base drag.
Inventors:
MAIKERU JIEI WAARU
UORUTAA MAIKERU PUREZU JIYUNIA
ROBAATO DABURIYU PATAASON
UORUTAA MAIKERU PUREZU JIYUNIA
ROBAATO DABURIYU PATAASON
Application Number:
JP33682687A
Publication Date:
July 14, 1988
Filing Date:
December 29, 1987
Export Citation:
Assignee:
UNITED TECHNOLOGIES CORP
International Classes:
B62D25/08; B62D35/00; B64C21/10; B63H9/06; B64C23/00; F42B10/22; (IPC1-7): B62D35/00; B64C21/10
Foreign References:
| US4455045A | 1984-06-19 |
Attorney, Agent or Firm:
Akashi Masatake