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Experimental Investigations on the Phantom Yaw Effect on a maneuvering slender body

Wysocki, Oliver and Schülein, Erich (2013) Experimental Investigations on the Phantom Yaw Effect on a maneuvering slender body. 31st AIAA Applied Aerodynamics Conference, 24.-27. Juni 2013, San Diego, USA.

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Official URL: http://arc.aiaa.org/doi/pdf/10.2514/6.2013-3033

Abstract

This paper deals with the topic of asymmetric vortices on slender bodies at high angles of attack called the Phantom Yaw Effect. In contrast to most of the existing studies, the Phantom Yaw is investigated both on the still and on the moving body undergoing pitching motions with almost realistic pitch rates. Tests were performed at different Mach numbers (0.5 ≤ M ≤ 1.1) and Reynolds numbers (2.0 ≤ 10^5  ReD ≤ 4.2 ≤ 10^5) but only some of the results obtained at M = 0.8 and ReD = 4.2 ∙ 10^5 are presented within this paper. The test model is a generic missile configuration with a blunt nose and a high fineness ratio of 20. With this model, the influence of the (nose) roll angle, as well as the effect of an asymmetric transition fixation (at the nose and shoulder section) on the formation of asymmetric vortices were studied. The tests showed that the asymmetry can be triggered but they also revealed that the mechanisms are not simple and the effects not always distinct. Furthermore, symmetrical longitudinal side-jets in the shoulder region (aerostrakes) were used to force a symmetric flow separation in order to reduce the occurring side forces and yawing moments. The tests showed that this device works well under static conditions (no model motion) but has deficiencies under dynamic conditions.

Item URL in elib:https://elib.dlr.de/78538/
Document Type:Conference or Workshop Item (Speech)
Additional Information:(doi: 10.2514/6.2013-3033)
Title:Experimental Investigations on the Phantom Yaw Effect on a maneuvering slender body
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Wysocki, Oliveroliver.wysocki (at) dlr.deUNSPECIFIED
Schülein, Ericherich.schuelein (at) dlr.deUNSPECIFIED
Date:2013
Refereed publication:No
Open Access:No
In DOAJ:No
In SCOPUS:No
In ISI Web of Science:No
Volume:Conference Proceedings online
Page Range:pp. 1-13
Status:Published
Keywords:Phantom Yaw, flow control
Event Title:31st AIAA Applied Aerodynamics Conference
Event Location:San Diego, USA
Event Type:international Conference
Event Dates:24.-27. Juni 2013
Organizer:American Institute of Aeronautics and Astronautics
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research (old)
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Flight Physics (old)
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > High Speed Configurations
Deposited By: Wysocki, Oliver
Deposited On:26 Aug 2013 09:09
Last Modified:08 May 2014 23:17

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