The University of Southampton
University of Southampton Institutional Repository

Aspect-ratio effects on aeromechanics of membrane wings at moderate reynolds numbers

Aspect-ratio effects on aeromechanics of membrane wings at moderate reynolds numbers
Aspect-ratio effects on aeromechanics of membrane wings at moderate reynolds numbers
The aspect ratio of a membrane wing at moderate Reynolds number Re=67,500 affects aerodynamic performance as well as membrane deformations. Wind-tunnel experiments are conducted using three different low-aspect-ratio wings (aspect ratios of 1, 1.5, and 2). Aerodynamic performance is determined from force and moment measurements, which are performed using a six-component force transducer. Membrane deformations are obtained using photogrammetry. Mean values and unsteady effects are examined for both aerodynamic performance and membrane deformations. Mean deflection results indicate that lower-aspect-ratio membrane wings show defined U-shape deflections along the span, whereas higher aspect ratios display a progressive rise in deformation to the wing tip. Dominant chordwise vibration modes of the membrane and their spectral content show that lower aspect ratios exhibit higher mode shapes and frequencies, likely caused by increased downwash, which delays the influence of vortex shedding into higher incidences. The frequencies of the dominant modes in membrane motions are found to correlate with the frequencies of lift and drag fluctuations


0001-1452
780-788
Bleischwitz, Robert
461358e1-6d90-4a9d-bc11-4a68595d4b7a
de Kat, Roeland
d46a99a4-8653-4698-9ef4-46dd0c77ba5d
Ganapathisubramani, Bharathram
5e69099f-2f39-4fdd-8a85-3ac906827052
Bleischwitz, Robert
461358e1-6d90-4a9d-bc11-4a68595d4b7a
de Kat, Roeland
d46a99a4-8653-4698-9ef4-46dd0c77ba5d
Ganapathisubramani, Bharathram
5e69099f-2f39-4fdd-8a85-3ac906827052

Bleischwitz, Robert, de Kat, Roeland and Ganapathisubramani, Bharathram (2015) Aspect-ratio effects on aeromechanics of membrane wings at moderate reynolds numbers. AIAA Journal, 53 (3), 780-788. (doi:10.2514/1.J053522).

Record type: Article

Abstract

The aspect ratio of a membrane wing at moderate Reynolds number Re=67,500 affects aerodynamic performance as well as membrane deformations. Wind-tunnel experiments are conducted using three different low-aspect-ratio wings (aspect ratios of 1, 1.5, and 2). Aerodynamic performance is determined from force and moment measurements, which are performed using a six-component force transducer. Membrane deformations are obtained using photogrammetry. Mean values and unsteady effects are examined for both aerodynamic performance and membrane deformations. Mean deflection results indicate that lower-aspect-ratio membrane wings show defined U-shape deflections along the span, whereas higher aspect ratios display a progressive rise in deformation to the wing tip. Dominant chordwise vibration modes of the membrane and their spectral content show that lower aspect ratios exhibit higher mode shapes and frequencies, likely caused by increased downwash, which delays the influence of vortex shedding into higher incidences. The frequencies of the dominant modes in membrane motions are found to correlate with the frequencies of lift and drag fluctuations


Full text not available from this repository.

More information

Accepted/In Press date: 9 October 2014
Published date: 3 March 2015
Organisations: Aerodynamics & Flight Mechanics Group

Identifiers

Local EPrints ID: 376545
URI: https://eprints.soton.ac.uk/id/eprint/376545
ISSN: 0001-1452
PURE UUID: cf161615-4752-41b4-a18d-a772a0538438
ORCID for Roeland de Kat: ORCID iD orcid.org/0000-0002-6851-4409
ORCID for Bharathram Ganapathisubramani: ORCID iD orcid.org/0000-0001-9817-0486

Catalogue record

Date deposited: 01 May 2015 10:31
Last modified: 06 Jun 2018 12:33

Export record

Altmetrics

Contributors

Author: Robert Bleischwitz
Author: Roeland de Kat ORCID iD

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of https://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×