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Wake Vortex Investigation in WSG without / with End-effect

Bao, F. and Vollmers, H. (2004) Wake Vortex Investigation in WSG without / with End-effect. DLR/ONERA - Annex II Meeting, DLR, Köln, 6. -7. April 2004.

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Abstract

An experimental study was carried out to establish a self-destructive wake vortex system. The study was made in the water towing tank in Göttingen (WSG), which was instrumented with a standard Stereoscopic PIV system and flow visualization setups. The tailoring of 4 vortices wake systems was achieved by employing a generic model with a main wing and several horizontal tail plains. By varying aspect ratios and incidences, various effects were generated and studied. The study exhibited that, with appropriate horizontal tail plain settings, the interaction of tail vortices with tip vortices may result in a promising self-destructive mechanism within the wake system in the sense that the vortex core experiences an instability and abrupt change of pattern. Typically, the interaction of wake vortex cores could be achieved as early as in 40 wing spans downstream with suitable tail settings. The possible influence from the finite movement in the water tank due to transient processes of the model (End-effect) was investigated. The end-effect could be essentially alleviated by isolating the working region with patented laboratory settings. The influence of the bottom and side wall effects was estimated from comparison of results from a larger water towing tank HSVA.

Document Type:Conference or Workshop Item (Speech)
Additional Information: LIDO-Berichtsjahr=2004,
Title:Wake Vortex Investigation in WSG without / with End-effect
Authors:
AuthorsInstitution or Email of Authors
Bao, F.UNSPECIFIED
Vollmers, H.UNSPECIFIED
Date:2004
Page Range:1-
Status:Published
Keywords:Wake Vortex Investigation, Stereoscopic PIV system, flow visualization
Event Title:DLR/ONERA - Annex II Meeting, DLR, Köln, 6. -7. April 2004
Organizer:DLR/ONERA
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Flight Physics
Location: Köln-Porz , Braunschweig , Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology
Deposited By: Ilka Micknaus
Deposited On:31 Jan 2006
Last Modified:14 Jan 2010 19:31

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