The effects of forebody strakes on asymmetric vortices on a vertically launched missile
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Authors
Yuan, Chih-Chung
Subjects
Vortex
Vertical Launch
Surface to Air Missile
High Angle of Attack
Turbulence
Strakes
Forebody
Ogive
Vertical Launch
Surface to Air Missile
High Angle of Attack
Turbulence
Strakes
Forebody
Ogive
Advisors
Howard, Richard M.
Date of Issue
1990
Date
Publisher
Monterey, California. Naval Postgraduate School
Language
en_US
Abstract
Wind tunnel tests were conducted on a vertically launched surface-to- air missile model to investigate the effects of forebody stakes on the side forces and yawing moments induced by nose-generated asymmetric vortices at high angles of attack. The effects of body configuration and a turbulent flowfield on the induced side forces and yawing moments were also examined. Test angles of attack ranged from 0 to 90 at Reynolds number of 150,000 based on the model diameter, and at a March number of 0.11. Three forebody configurations, two body configurations and two flowfield conditions were investigated. The flowfield with a turbulence length scale on the order of the vortex scale was found to have no significant influence on the induced side forces and yawing moments. The change of body configuration had no strong effects on the side forces and yawing moments either. The '4 STRAKES' forebody demonstrated dramatic results in the yawing moment alleviation; the ranges of angle of attack in the induced side forces and yawing moments were also decreased by this modification. The '8' STRAKES forebody gave no significant improvement in the induced side force and yawing moment reduction.
Type
Thesis
Description
Series/Report No
Department
Aeronautics and Astronautics
Organization
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
Sponsors
Funder
Format
xiv, 159 p.: ill.
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
Copyright is reserved by the copryright owner.