1. feb. 2005 - wakenetwakenet.eu/fileadmin/wakenet2-europe/wakenet2/past events/wg7, … · 1.1 m x...
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Heinrich VollmersHeinrich Vollmers
* 27. Aug. 1943* 27. Aug. 1943† 1. Feb. 2005† 1. Feb. 2005
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H. Vollmers, F. Bao, H. Mattner
Institut für Aerodynamik undStrömungstechnik
DLR Göttingen
DLR Projekt -- Wirbelschleppe IIDLR Projekt -- Wirbelschleppe IIHAP1HAP1
3. Statustreffen im Projekt Wirbelschleppe II3. Statustreffen im Projekt Wirbelschleppe II20. Januar 2005, DLR Braunschweig20. Januar 2005, DLR Braunschweig
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water towing tank of DLR in Göttingenwater towing tank of DLR in Göttingen
1.1 m x 1.1 m18 mUmax = 5 m/s
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flow visualisation of the wake vortex in WSGflow visualisation of the wake vortex in WSG
towing speed set to 2.0 m/s
entrainment ofparticles by modelis visualized(EVT)
view intotankfrom front
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model setup for generating a 4 wake vortices systemmodel setup for generating a 4 wake vortices system
generic airfoil+
tail-plain(negative incidence)
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flow visualisation of the wake flow fieldsflow visualisation of the wake flow fields
Left: the wake vortex pair of theprinciple airfoil.The circulation (vortex core) keepsits intensity for more than 60 spans
Right: The two additional vorticesadded to interact with the mainwake vortices which interactwithin 30 spans
(view from bottom of tank)
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method to generate a secondary vortex:method to generate a secondary vortex:the half wish-bone devicethe half wish-bone device
Triangular flaps or wishbone(HW) devices in pair generatethe additional vortices similarto those generated from HTP
HW device on generic model
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half wishbone (HW)attached under the
wing near to afairing
c = 0.227 mh = 0.083 ms/2 = 0.112 m
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light source (laser)
light sheet opticsmirror
light sheet
flow withtracer particles
illuminated particles
imaging opticsflow direction
tracers
illumination
recording
evaluation
post processing
experimental setup for PIV recording in a wind tunnelexperimental setup for PIV recording in a wind tunnel
PParticle article IImagemageVVelocimetryelocimetry
first flash at t0
second flash at t1
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set up of light sheet and cameras for stereo PIVset up of light sheet and cameras for stereo PIV
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PIV measurements by DLR & ONERA
- 10 cameras (1390mm x920mm)- Total Vector Number: 48500
Tests at ONERA B10 Catapult
For future tests: needs for PIV traversesystem during flight at catapult
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Tests at ONERA B20 Catapult
Traverse PIV system12 cameras
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Links wurde das Modell nach Durchfahren des Messbereiches abgebremst. Rechtswurde dieser Bereich mit einer Platte abgetrennt.
AP1-3/M1-3-1: Einfluss der endlichen Messstrecke inAP1-3/M1-3-1: Einfluss der endlichen Messstrecke inWasserschleppkanälen und im KatapultWasserschleppkanälen und im Katapult
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AP1-3/M1-3-1: Einfluss der endlichen Messstrecke inAP1-3/M1-3-1: Einfluss der endlichen Messstrecke inWasserschleppkanälen und im KatapultWasserschleppkanälen und im Katapult
Geschwindigkeitsfeld nach 3,2 Sekunden nach Durchfahren des Lichtschnittes
mit abgetrenntemBeschleunigungsbereich
ohne abgetrenntenBeschleunigungsbereich
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AP1-3/M1-3-2 Messungen und Auswertung zum Re-AP1-3/M1-3-2 Messungen und Auswertung zum Re-Einfluss mit großem Prinzipmodell F13X in einemEinfluss mit großem Prinzipmodell F13X in einemWasserschleppkanal (04/I-04/II)Wasserschleppkanal (04/I-04/II)
400% Modell F13X zurValidierung der WSG-Studien:
• Endeffekt• Seiten/Boden-Effekt• Reynolds-Zahleffekt
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AP1-3/M1-3-3: Bau eines TriebwerkstrahlsimulatorsAP1-3/M1-3-3: Bau eines Triebwerkstrahlsimulators
Versorgung mit WasserfertiggestelltBeurteilung des Strahles mit3C-PIV folgt
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