Static and dynamic flow visualization studies of two double-delta wing models at high angles of attack
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Authors
Li, Feng-Hsi
Subjects
High angle of attack aerodynamics
Effect of static AOA
Pitch rate dynamic motion
Flow visualization by dye injection
Vortex development and bursting
Water tunnel studies
Effect of fillet
Baseline or modified double-delta wing
Effect of static AOA
Pitch rate dynamic motion
Flow visualization by dye injection
Vortex development and bursting
Water tunnel studies
Effect of fillet
Baseline or modified double-delta wing
Advisors
Hebbar, S.K.
Platzer, Max F.
Date of Issue
1992-03
Date
March 1992
Publisher
Monterey, California. Naval Postgraduate School
Language
en_US
Abstract
A water tunnel flow visualization was performed to study the vortex development and bursting phenomena on a baseline double delta wing model and a modified double delta wing model. The primary focus of this study was two-fold: First, to study the static and dynamic effects of pitch and pitch rate on the vertical flowfield of the individual models. Second to compare the vortex breakdown characteristics of these two models under static and dynamic conditions. Results indicate that the vortex burst location moves forward with increasing AOA for both the models relative to the static case, the bursting is delayed during pitch up motion with the vortex burst lag increasing with the pitch rate. Compared with the baseline model, the small geometry model changes the local flowfield in developing the wing vortex earlier and promoting earlier coiling-up of strake and wing vortices.
Type
Thesis
Description
Series/Report No
Department
Department of Aeronautics and Astronautics
Organization
Naval Postgraduate School
Identifiers
NPS Report Number
Sponsors
Funder
Format
100 p.
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
Copyright is reserved by the copyright owner