Quantitative force measurements of pneumatic control on a wing/strake model.
Loading...
Authors
Willson, James Griffin
Subjects
Strake
Vortex Control
Blowing
Vortex Interaction
Enhanced Lift
Vortex Control
Blowing
Vortex Interaction
Enhanced Lift
Advisors
Howard, Richard M.
Date of Issue
1992-09
Date
Publisher
Monterey, California. Naval Postgraduate School
Language
en_US
Abstract
A low-speed wind-tunnel study to quantitatively measure
the lift and drag effects of pneumatically controlling a
leading edge vortex generated by a half-span, genericfighter-
wing model was conducted. The study measured the
added lift and drag upon the model, throughout a range of
angles of attack, utilizing blowing tubes of different
geometry and orientations. The effects of blowing upon the
high pressure side of the strake were also investigated.
Results showed that the effects of blowing were limited to
changes in lift with no apparent changes in drag. Blowing
appeared to reattach the flow during the initial stages of
wing stall. Blowing increased lift by a maximum of 3.75% at
angles of attack greater than 25°. The effects of blowing
appeared oscillatory with respect to angle of attack.
Blowing rates were varied from C„=0.0 to 0.0035 in an
attempt to determine an optimum. It was found that changes
in blowing rates had little effect upon ACL .
Type
Thesis
Description
Series/Report No
Department
Aeronautical Engineering
Organization
Naval Postgraduate School
Identifiers
NPS Report Number
Sponsors
Funder
Format
112 p.;28 cm.
Citation
Distribution Statement
Approved for public release; distribution is unlimited.