Vortex Breakdown From a Pitching Delta Wing Incident Upon a Plate: Flow Structure as the Origin of Buffet Loading

Özgören, Murat; Şahi̇n, Beşi̇r; Rockwell, D.

doi:10.1006/jfls.2001.0427

Cited by 9 publications

(1 citation statement)

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“…External pressure gradient is detected as effective for chancing time lag of vortex breakdown location. When pitching motion is [38] applied on wing, an induced phase shift occurs between the wing motion and the onset of vortex breakdown, which depends on a continuous loop between of vortex breakdown position and angle of attack. The usage of delta wing actuators can be [39] able to delay the breakdown of the streamwise vortices with oscillation amplitudes of only one viscous scale.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Flow Characteristics and Vortex Formations of Lambda Wing at High Angles of Attack

Yavuz¹

2020

Journal of Thermal Engineering

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It is well known in literature that further stages of flow separation and vortex breakdown around wings can be able to cause stall of wings. These formations must be investigated carefully for new plane types. However, some limited studies are available, especially on lambda wing for high angles of attack. In this study, effect of angle of attack on flow characteristics and vortex breakdown around a lambda wing is investigated with a constant Reynolds number of 10000. Computational fluid dynamic analysis is used and results of high angles of attack of the wing are given up to 45 0 which are not available in literature. Open water channel simulation is used. Vortex breakdown initially begins at an angle of 17 0 and it almost reaches to tip of wing when angle of attack is equal to 25 0. Vortices get stronger at further increments of angle of attack and they become to nearly equal length of wing at 45 0. Rounding effect of leading edges is investigated for decreasing vortex magnitudes. Streamline, particle injection, iso-value of vortices and location of stagnation points are given, and they are discussed in detail.

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Section: Introductionmentioning

confidence: 99%