What was Learned from the New VFE-2 Experiments?

Luckring, James M.; Hummel, Dietrich

doi:10.2514/6.2008-383

Cited by 37 publications

(33 citation statements)

References 13 publications

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“…At certain conditions, on a delta wing with a symmetrically rounded leading edge a second primary vortex is found inboard of the primary vortex. 13 The size and strength of the primary vortex tends to reduce with increasing leading-edge radius r le . Associated with this is a reduction of the induced surface-pressure suction peak.…”

Section: Effects Of Leading-edge Shape On Delta Wing Characteristicsmentioning

confidence: 99%

“…[7][8][9][10][11][12][13][14] The studies show that the edge shape affects the origin and location of the primary-separation line, the size and position of the primary vortex and through mutual interaction with the wing boundary layer the generation of a secondary vortex and possibly a tertiary vortex. At certain conditions, on a delta wing with a symmetrically rounded leading edge a second primary vortex is found inboard of the primary vortex.…”

Section: Effects Of Leading-edge Shape On Delta Wing Characteristicsmentioning

confidence: 99%

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Effects of Leading-Edge Radius on Aerodynamic Characteristics of 50º Delta Wings

Verhaagen

2010

48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition

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The study focuses on the effects of the leading-edge radius on the flow over 50 o swept delta wing models. Three models were tested, one model having a sharp leading edge and the other two having a semi-circular leading edge of different radius. The vortical flow on and off the surface of the models was investigated using an oil-flow visualization and a Stereo Particle Image Velocimetry (SPIV) technique. The leading-edge radius is shown to affect the size and location of the vortices and also the vortex bursting location over the models. As a result of this, the leadingedge radius also affects the forces and moment acting on a 50 o delta wing.

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Section: Effects Of Leading-edge Shape On Delta Wing Characteristicsmentioning

confidence: 99%

Section: Effects Of Leading-edge Shape On Delta Wing Characteristicsmentioning

confidence: 99%

Effects of Leading-Edge Radius on Aerodynamic Characteristics of 50º Delta Wings

Verhaagen

2010

48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition

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“…For the investigation, a generic half delta wing model following the geometry of the Vortex Flow Experiment 2 configuration (VFE-2) is used. Within the VFE-2 project, an extensive numerical and experimental database on the flow around this wing configuration was gained [21,22]. The delta wing model has a wing sweep of ϕ = 65…”

Section: Wind-tunnel Modelmentioning

confidence: 99%

Dynamic Actuation for Delta Wing Post Stall Flow Control

Kölzsch

Blanchard

Breitsamter

2016

Notes on Numerical Fluid Mechanics and Multidisciplinary Design

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The manipulation of delta wing flow by active and passive flow control methods is of great interest for increasing the performance (e.g. lift enhancement) of such configurations. This work presents experimental results in the post-stall regime at very high angles of attack (α = 35-45• ) on a 65• sweptback generic half delta wing configuration (VFE-2 geometry) with sharp leading edge using slot actuators for pulsed blowing along the leading edge. The study comprises results of force, velocity and pressure measurements and substantiates the receptivity of the shear layer for the pulsed excitation. For α = 35• , an actuation at F + ≈ 2.7 effects a retardation of vortex breakdown. For α = 45• , the optimum pulse frequency was found at F + = 1.0-1.5, which leads to the re-establishment of a burst vortex and a significant increase in lift, thus satisfying the aim of enhancing aerodynamic performance.

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“…A detailed research on pressure distribution measurement especially in the region of the onset of flow separation for configurations with rounded leading edge was also studied. The models tested in the NASA transonic wind tunnels [7] were reused again as a generic model for further investigation using modern measurements techniques such as particle image velocimetry (PIV), pressure sensitive paint, hot wire, and steady balance within the VFE-2 team in wind tunnels across Europe Research Institutions [8][9][10][11][12][13]. The profile of the model [7] is shown in Figure 1(a) and its installation in the wind tunnel is shown in Figure 1(b).…”

Section: Introductionmentioning

confidence: 99%

Development of Delta Wing Aerodynamics Research in Universiti Teknologi Malaysia Low Speed Wind Tunnel

Mat

Ishak

Lazim

et al. 2014

Advances in Mechanical Engineering

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This paper presents wind tunnel experiment on two delta wing configurations which are differentiated by their leading edge profiles: sharp and round-edged wings. The experiments were performed as a part of the delta wing aerodynamics research development in Universiti Teknologi Malaysia, low speed tunnel (UTM-LST). Steady load balance and flow visualization tests were conducted at Reynolds numbers of 0.5, 1, and 1.5 × 10 6 , respectively. The flow measurement at low Reynolds number was also performed at as low as speed of 5 m/s. During the experiments, laser with smoke flow visualizations test was performed on both wings. The study has identified interesting features of the interrelationship between the conventional leading edge primary vortex and the occurrence and development of the vortex breakdown above the delta wings. The results conclude the vortex characteristics are largely dependent on the Reynolds number, angle of attack, and leading-edge radii of the wing.

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What was Learned from the New VFE-2 Experiments?

Cited by 37 publications

References 13 publications

Effects of Leading-Edge Radius on Aerodynamic Characteristics of 50º Delta Wings

Effects of Leading-Edge Radius on Aerodynamic Characteristics of 50º Delta Wings

Dynamic Actuation for Delta Wing Post Stall Flow Control

Development of Delta Wing Aerodynamics Research in Universiti Teknologi Malaysia Low Speed Wind Tunnel

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