A geometrically non-linear time-domain unsteady lifting-line theory

Hugh Bird; Shuji Otomo; Kiran Ramesh; Ignazio Maria Viola

doi:10.2514/6.2019-1377

A geometrically non-linear time-domain unsteady lifting-line theory

Hugh Bird, Shuji Otomo, Kiran Ramesh, Ignazio Maria Viola

School of Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract / Description of output

An unsteady lifting-line theory for time-domain problems with arbitrary kinematics is presented. This is formulated by matching a vortex particle based 2D inner model with a 3D vortex lattice wake. This and a small-amplitude frequency-domain unsteady lifting-line theory are then verified against experiment and computational fluid dynamics for the case of a flat rectangular plate oscillating in heave at aspect ratios 3 and 6. Both lifting-line theories were found to generally be in good agreement with experimental and CFD results, providing reasonable solutions even in cases dominated by LEV shedding. For larger amplitude problems, the new non-linear geometry lifting-line theory predicted larger amplitudes and higher average lift coefficient than the small-amplitude lifting-line theory.

Original language	English
Title of host publication	AIAA Scitech 2019 Forum
Publisher	American Institute of Aeronautics and Astronautics Inc. (AIAA)
Number of pages	26
ISBN (Print)	9781624105784
DOIs	https://doi.org/10.2514/6.2019-1377
Publication status	Published - 6 Jan 2019
Event	AIAA Science and Technology Forum and Exposition 2019 - San Diego, United States Duration: 7 Jan 2019 → 11 Jan 2019

Conference

Conference	AIAA Science and Technology Forum and Exposition 2019
Abbreviated title	SciTech2019
Country/Territory	United States
City	San Diego
Period	7/01/19 → 11/01/19

Access to Document

10.2514/6.2019-1377

Bird et al., 2019, A geometrically non-linear time-domain unsteady lifting-line theory, AIAA Science and Technology Forum and ExpositionSubmitted manuscript, 12 MB
HJA_BIRD_AIAA_SciTechFinalAccepted author manuscript, 12 MB

Cite this

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title = "A geometrically non-linear time-domain unsteady lifting-line theory",

abstract = "An unsteady lifting-line theory for time-domain problems with arbitrary kinematics is presented. This is formulated by matching a vortex particle based 2D inner model with a 3D vortex lattice wake. This and a small-amplitude frequency-domain unsteady lifting-line theory are then verified against experiment and computational fluid dynamics for the case of a flat rectangular plate oscillating in heave at aspect ratios 3 and 6. Both lifting-line theories were found to generally be in good agreement with experimental and CFD results, providing reasonable solutions even in cases dominated by LEV shedding. For larger amplitude problems, the new non-linear geometry lifting-line theory predicted larger amplitudes and higher average lift coefficient than the small-amplitude lifting-line theory.",

author = "Hugh Bird and Shuji Otomo and Kiran Ramesh and Viola, {Ignazio Maria}",

note = "Acceptance date set to exclude from REF OA Policy; AIAA Science and Technology Forum and Exposition 2019, SciTech2019 ; Conference date: 07-01-2019 Through 11-01-2019",

year = "2019",

month = jan,

day = "6",

doi = "10.2514/6.2019-1377",

language = "English",

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booktitle = "AIAA Scitech 2019 Forum",

publisher = "American Institute of Aeronautics and Astronautics Inc. (AIAA)",

address = "United States",

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T1 - A geometrically non-linear time-domain unsteady lifting-line theory

AU - Bird, Hugh

AU - Otomo, Shuji

AU - Ramesh, Kiran

AU - Viola, Ignazio Maria

N1 - Acceptance date set to exclude from REF OA Policy

PY - 2019/1/6

Y1 - 2019/1/6

N2 - An unsteady lifting-line theory for time-domain problems with arbitrary kinematics is presented. This is formulated by matching a vortex particle based 2D inner model with a 3D vortex lattice wake. This and a small-amplitude frequency-domain unsteady lifting-line theory are then verified against experiment and computational fluid dynamics for the case of a flat rectangular plate oscillating in heave at aspect ratios 3 and 6. Both lifting-line theories were found to generally be in good agreement with experimental and CFD results, providing reasonable solutions even in cases dominated by LEV shedding. For larger amplitude problems, the new non-linear geometry lifting-line theory predicted larger amplitudes and higher average lift coefficient than the small-amplitude lifting-line theory.

AB - An unsteady lifting-line theory for time-domain problems with arbitrary kinematics is presented. This is formulated by matching a vortex particle based 2D inner model with a 3D vortex lattice wake. This and a small-amplitude frequency-domain unsteady lifting-line theory are then verified against experiment and computational fluid dynamics for the case of a flat rectangular plate oscillating in heave at aspect ratios 3 and 6. Both lifting-line theories were found to generally be in good agreement with experimental and CFD results, providing reasonable solutions even in cases dominated by LEV shedding. For larger amplitude problems, the new non-linear geometry lifting-line theory predicted larger amplitudes and higher average lift coefficient than the small-amplitude lifting-line theory.

UR - http://www.scopus.com/inward/record.url?scp=85068961609&partnerID=8YFLogxK

U2 - 10.2514/6.2019-1377

DO - 10.2514/6.2019-1377

M3 - Conference contribution

SN - 9781624105784

BT - AIAA Scitech 2019 Forum

PB - American Institute of Aeronautics and Astronautics Inc. (AIAA)

T2 - AIAA Science and Technology Forum and Exposition 2019

Y2 - 7 January 2019 through 11 January 2019

ER -

A geometrically non-linear time-domain unsteady lifting-line theory

Abstract / Description of output

Conference

Access to Document

Other files and links

Fingerprint

Investigation of Flapping Wings as a Means of Hydroelectric Power Generation

Unsteady lift on a high-amplitude pitching aerofoil

Cite this

A geometrically non-linear time-domain unsteady lifting-line theory

Abstract / Description of output

Conference

Access to Document

Other files and links

Fingerprint

Projects

Investigation of Flapping Wings as a Means of Hydroelectric Power Generation

Research output

Unsteady lift on a high-amplitude pitching aerofoil

Cite this