Near-Surface Topology and Flow Structure on a Delta Wing

Yavuz, Mehmet Metin; Elkhoury, M.; Rockwell, D.

doi:10.2514/1.3499

Cited by 45 publications

(23 citation statements)

References 8 publications

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“…Along the leading edge of the wing, well-defined clusters of negative ω occur, due to a three-dimensional instability of the shear layer separating from the windward surface of the wing. Regarding the positive, elongated layer of vorticity at α = 5 deg, its form is generally similar to that characterized by Yavuz et al 9 for a wing of different but low sweep angle. Corresponding dye visualization showed that this well-defined region of vorticity is the footprint of the leading-edge vortex, as represented in Fig.…”

Section: Near-surface Topology In Absence Of Controlsupporting

confidence: 81%

“…Yavuz et al 9 investigated the near-surface topology and flow structure for a wing of sweep angle = 38.7 deg, including the effect of wing perturbations and transient motion of the wing; a near-surface technique of PIV was employed.…”

Section: A Flow Structure and Topology On Moderate-and Low-swept Delmentioning

confidence: 99%

“…To provide a guide for interpretation of these patterns, in relation to classical dye visualization, an excerpt from the investigation of Yavuz et al 9 is given in Fig. 1b.…”

Section: Experimental System and Techniquesmentioning

confidence: 99%

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Control of Flow Structure on Delta Wing with Steady Trailing-Edge Blow

Yavuz

Rockwell

2006

AIAA Journal

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The near-surface flow structure and topology are characterized on a delta wing of low sweep angle, which is subjected to trailing-edge blowing. A technique of high-image-density particle image velocimetry is employed to determine the topological critical points adjacent to the surface and in the near wake of the wing, in relation to the dimensionless magnitude of the blowing coefficient. These topological features are, in turn, interpreted in conjunction with patterns of surface-normal vorticity and near-surface velocity fluctuations, which provide an indication of buffet loading. Even though the jet blowing is at the trailing edge, it has a remarkable, global influence on the surface patterns located well upstream; at high angle of attack, it leads to eradication of large-scale, three-dimensional separation in the vicinity of the apex.

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Section: Near-surface Topology In Absence Of Controlsupporting

confidence: 81%

Section: A Flow Structure and Topology On Moderate-and Low-swept Delmentioning

confidence: 99%

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Control of Flow Structure on Delta Wing with Steady Trailing-Edge Blow

Yavuz

Rockwell

2006

AIAA Journal

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“…Ol and Gharib, 2003 and references therein). The use of particle image velocimetry (PIV) to educe the near-surface topology (Yavuz et al, 2004) is promising because it allows the identification of regions of unsteadiness along the surface of the fixed or moving wing. Less slender wings having low angles of attack and for flows of lower Reynolds numbers where studied by Ol and Gharib (2003) using stereoscopic PIV.…”

Section: Introductionmentioning

confidence: 99%

Unsteady wall pressure field of a model A-pillar conical vortex

Hoarau

Borée

Laumonier

et al. 2008

International Journal of Heat and Fluid Flow

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“…It was found that there is a strong interaction between vortex breakdown and delta wing planform. In order to determine results of this interaction, the near surface topology of a generic delta wing is investigated by [8] by utilizing two dimensional particle image velocimetry. Moreover, [9] and [10] also perform measurements close to the surface of different delta wings using stereoscopic particle image velocimetry.…”

Section: Introductionmentioning

confidence: 99%

Aerodynamics and Flow Characteristics of X-45 Delta Wing Planform

Yanıktepe¹,

Özalp²,

Canpolat³

2016

KSU J. Eng. Sci.

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ABSTRACT:The present experimental work investigates the near surface flow structure and aerodynamic characteristics of X-45 type non-slender delta wing planform using dye visualization, Stereoscopic Particle Image Velocimetry (stereo-PIV) and aerodynamic load measurements. The instantaneous images are acquired on the planview plane within 5 o ≤ α ≤ 20 o to calculate the time-averaged flow data. In order to compare flow structures with other non-slender wing planforms such as delta and lambda, previously presented dye visualization and stereo-PIV results are also provided. It can be concluded that vortical flow with a pair of well-defined LEVs over X-45 develop at very low angles of attack, and form close to the wing surface similar to delta and lambda planforms. The stall occurs at an angle of attack α = 32 o , whereas stalling is evident at relatively lower angles of attack for simple delta wing. Keywords: Aerodynamics, delta wing, stereo-PIV, X-45 X-45 Tipi Delta Kanat Modeli Üzerinde Oluşan Akış Karakteristikleri ve AerodinamiğiÖZET: Mevcut deneysel çalışma ile X-45 tipi delta kanat modeli üzerinde oluşan yakın yüzey akış yapısı ve aerodinamik karakteristikleri, boya görüntüleme, üç boyutlu Stereoskopik Parçacık Görüntüleme Tekniği (stereo PIV) ve aerodinamik kuvvet ölçümleri kullanılarak araştırılmıştır. Anlık görüntüler ile üst görünüş düzleminde zaman ortalama akış verileri 5 o ≤ α ≤ 20 o hücum açılarında elde edilmiştir. Delta ve Lamda tipi diğer düşük süpürme açılarına sahip delta kanat modelleri ile akış yapılarını karşılaştırmak için önceki sunulan boya görüntüleri ve stero-PIV sonuçları kullanılmıştır. Düşük hücum açılarında X-45 tipi delta kanat modeli üzerinde iyi tanımlanmış ön uç yanal girdaplar delta ve lamda modellerine benzer kanat yüzeyinde oluşmaktadır. X-45 tipi delta kanat modelinde ölü akış yapısı α = 32 o de oluşmaktayken basit delta kanat ve lamda modellerinde daha düşük hücum açılarında meydana gelmektedir.

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Near-Surface Topology and Flow Structure on a Delta Wing

Cited by 45 publications

References 8 publications

Control of Flow Structure on Delta Wing with Steady Trailing-Edge Blow

Control of Flow Structure on Delta Wing with Steady Trailing-Edge Blow

Unsteady wall pressure field of a model A-pillar conical vortex

Aerodynamics and Flow Characteristics of X-45 Delta Wing Planform

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