Three-Dimensional Instabilities of Vortices on a Periodically Plunging Wing

Onur Son; Zhijin Wang; Ismet Gursul

doi:10.2514/6.2021-1211

Three-Dimensional Instabilities of Vortices on a Periodically Plunging Wing

Onur Son, Zhijin Wang, Ismet Gursul

Research output: Contribution to conference › Paper › peer-review

3 Citations (SciVal)

Abstract

Three-dimensional vortex instabilities are examined on a periodically plunging wing oscillating in a reduced frequency range of k = 0.5 to 3. Two values of the normalized peak-to-peak plunging amplitudes are tested (A/c = 0.1 and A/c = 0.5) at a Reynolds number based on the chord length of Re = 10,000. Leading-edge, trailing-edge and tip vortices are revealed via phase-averaged volumetric velocimetry measurements. Instabilities of the leading-edge vortices are found to initiate at the tip section. These instabilities grow to a helical pattern, similar to an m=1 mode. Tip vortices also show spiraling instabilities due to the interaction with the trailing-edge vortices. Plunging amplitude and plunging frequency are observed to have direct effect on the wavelength of the instabilities.

Original language	English
Pages	1-11
Number of pages	11
DOIs	https://doi.org/10.2514/6.2021-1211
Publication status	Published - 11 Jan 2021
Event	AIAA Science and Technology Forum and Exposition - , USA United States Duration: 11 Jan 2021 → 21 Jan 2021

Conference

Conference	AIAA Science and Technology Forum and Exposition
Abbreviated title	SciTech 2021
Country/Territory	USA United States
Period	11/01/21 → 21/01/21

Bibliographical note

Funding Information:
Council (EPSRC) Grant

Funding Information:
The authors acknowledge the Engineering and Physical Sciences Research Council (EPSRC) Grant No. EP/S028994/1.

Publisher Copyright:
© 2021, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.

ASJC Scopus subject areas

Aerospace Engineering

Access to Document

10.2514/6.2021-1211

Cite this

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title = "Three-Dimensional Instabilities of Vortices on a Periodically Plunging Wing",

abstract = "Three-dimensional vortex instabilities are examined on a periodically plunging wing oscillating in a reduced frequency range of k = 0.5 to 3. Two values of the normalized peak-to-peak plunging amplitudes are tested (A/c = 0.1 and A/c = 0.5) at a Reynolds number based on the chord length of Re = 10,000. Leading-edge, trailing-edge and tip vortices are revealed via phase-averaged volumetric velocimetry measurements. Instabilities of the leading-edge vortices are found to initiate at the tip section. These instabilities grow to a helical pattern, similar to an m=1 mode. Tip vortices also show spiraling instabilities due to the interaction with the trailing-edge vortices. Plunging amplitude and plunging frequency are observed to have direct effect on the wavelength of the instabilities.",

author = "Onur Son and Zhijin Wang and Ismet Gursul",

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AU - Wang, Zhijin

AU - Gursul, Ismet

N1 - Funding Information: Council (EPSRC) Grant Funding Information: The authors acknowledge the Engineering and Physical Sciences Research Council (EPSRC) Grant No. EP/S028994/1. Publisher Copyright: © 2021, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.

PY - 2021/1/11

Y1 - 2021/1/11

N2 - Three-dimensional vortex instabilities are examined on a periodically plunging wing oscillating in a reduced frequency range of k = 0.5 to 3. Two values of the normalized peak-to-peak plunging amplitudes are tested (A/c = 0.1 and A/c = 0.5) at a Reynolds number based on the chord length of Re = 10,000. Leading-edge, trailing-edge and tip vortices are revealed via phase-averaged volumetric velocimetry measurements. Instabilities of the leading-edge vortices are found to initiate at the tip section. These instabilities grow to a helical pattern, similar to an m=1 mode. Tip vortices also show spiraling instabilities due to the interaction with the trailing-edge vortices. Plunging amplitude and plunging frequency are observed to have direct effect on the wavelength of the instabilities.

AB - Three-dimensional vortex instabilities are examined on a periodically plunging wing oscillating in a reduced frequency range of k = 0.5 to 3. Two values of the normalized peak-to-peak plunging amplitudes are tested (A/c = 0.1 and A/c = 0.5) at a Reynolds number based on the chord length of Re = 10,000. Leading-edge, trailing-edge and tip vortices are revealed via phase-averaged volumetric velocimetry measurements. Instabilities of the leading-edge vortices are found to initiate at the tip section. These instabilities grow to a helical pattern, similar to an m=1 mode. Tip vortices also show spiraling instabilities due to the interaction with the trailing-edge vortices. Plunging amplitude and plunging frequency are observed to have direct effect on the wavelength of the instabilities.

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T2 - AIAA Science and Technology Forum and Exposition

Y2 - 11 January 2021 through 21 January 2021

ER -

Three-Dimensional Instabilities of Vortices on a Periodically Plunging Wing

Abstract

Conference

Bibliographical note

ASJC Scopus subject areas

Access to Document

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Three-dimensionality and instabilities of leading-edge vortices

Cite this

Three-Dimensional Instabilities of Vortices on a Periodically Plunging Wing

Abstract

Conference

Bibliographical note

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Projects

Three-dimensionality and instabilities of leading-edge vortices

Cite this