Interaction of multiple vortices over a double delta wing

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Interaction of strake and wing vortices over a 70◦/50◦double delta wing were studied experimentally in a wind tunnel using particle image velocimetry (PIV) measurements. The upstream effect of the wing vortex on the formation of the strake vortex was identified. A dual-vortex structure of the strake vortices was observed before the wing vortex developed. Further downstream, wing and strake vortices rotated around each other slowly initially, and then faster with downstream distance, at an increasing rate with increasing incidence. Prior to vortex breakdown, both wing and strake vortices were found meandering in relatively small regions. The correlation between the instantaneous locations of the vortices increases if the vortices become sufficiently close to each other. The proper orthogonal decomposition (POD) analysis of the instantaneous velocity fields suggested that, for both wing and strake vortices, the most energetic mode was displacement in the first helical mode. The most energetic mode reveals out-of-phase displacements when the vortices are close to each other.
LanguageEnglish
Pages291-307
Number of pages17
JournalAerospace Science and Technology
Volume48
Early online date1 Dec 2015
DOIs
StatusPublished - Jan 2016

Fingerprint

Vortex flow
Velocity measurement
Wind tunnels
Decomposition

Cite this

Interaction of multiple vortices over a double delta wing. / Zhang, Xizhe; Wang, Zhijin; Gursul, Ismet.

In: Aerospace Science and Technology, Vol. 48, 01.2016, p. 291-307.

Research output: Contribution to journalArticle

@article{7d35006dffe747a88bf448ba5e4019ad,
title = "Interaction of multiple vortices over a double delta wing",
abstract = "Interaction of strake and wing vortices over a 70◦/50◦double delta wing were studied experimentally in a wind tunnel using particle image velocimetry (PIV) measurements. The upstream effect of the wing vortex on the formation of the strake vortex was identified. A dual-vortex structure of the strake vortices was observed before the wing vortex developed. Further downstream, wing and strake vortices rotated around each other slowly initially, and then faster with downstream distance, at an increasing rate with increasing incidence. Prior to vortex breakdown, both wing and strake vortices were found meandering in relatively small regions. The correlation between the instantaneous locations of the vortices increases if the vortices become sufficiently close to each other. The proper orthogonal decomposition (POD) analysis of the instantaneous velocity fields suggested that, for both wing and strake vortices, the most energetic mode was displacement in the first helical mode. The most energetic mode reveals out-of-phase displacements when the vortices are close to each other.",
author = "Xizhe Zhang and Zhijin Wang and Ismet Gursul",
year = "2016",
month = "1",
doi = "10.1016/j.ast.2015.11.020",
language = "English",
volume = "48",
pages = "291--307",
journal = "Aerospace Science and Technology",
issn = "1270-9638",
publisher = "Elsevier Masson SAS",

}

TY - JOUR

T1 - Interaction of multiple vortices over a double delta wing

AU - Zhang, Xizhe

AU - Wang, Zhijin

AU - Gursul, Ismet

PY - 2016/1

Y1 - 2016/1

N2 - Interaction of strake and wing vortices over a 70◦/50◦double delta wing were studied experimentally in a wind tunnel using particle image velocimetry (PIV) measurements. The upstream effect of the wing vortex on the formation of the strake vortex was identified. A dual-vortex structure of the strake vortices was observed before the wing vortex developed. Further downstream, wing and strake vortices rotated around each other slowly initially, and then faster with downstream distance, at an increasing rate with increasing incidence. Prior to vortex breakdown, both wing and strake vortices were found meandering in relatively small regions. The correlation between the instantaneous locations of the vortices increases if the vortices become sufficiently close to each other. The proper orthogonal decomposition (POD) analysis of the instantaneous velocity fields suggested that, for both wing and strake vortices, the most energetic mode was displacement in the first helical mode. The most energetic mode reveals out-of-phase displacements when the vortices are close to each other.

AB - Interaction of strake and wing vortices over a 70◦/50◦double delta wing were studied experimentally in a wind tunnel using particle image velocimetry (PIV) measurements. The upstream effect of the wing vortex on the formation of the strake vortex was identified. A dual-vortex structure of the strake vortices was observed before the wing vortex developed. Further downstream, wing and strake vortices rotated around each other slowly initially, and then faster with downstream distance, at an increasing rate with increasing incidence. Prior to vortex breakdown, both wing and strake vortices were found meandering in relatively small regions. The correlation between the instantaneous locations of the vortices increases if the vortices become sufficiently close to each other. The proper orthogonal decomposition (POD) analysis of the instantaneous velocity fields suggested that, for both wing and strake vortices, the most energetic mode was displacement in the first helical mode. The most energetic mode reveals out-of-phase displacements when the vortices are close to each other.

UR - http://dx.doi.org/10.1016/j.ast.2015.11.020

U2 - 10.1016/j.ast.2015.11.020

DO - 10.1016/j.ast.2015.11.020

M3 - Article

VL - 48

SP - 291

EP - 307

JO - Aerospace Science and Technology

T2 - Aerospace Science and Technology

JF - Aerospace Science and Technology

SN - 1270-9638

ER -