The University of Southampton
University of Southampton Institutional Repository

Aerodynamics of surface-mounted ribs

Aerodynamics of surface-mounted ribs
Aerodynamics of surface-mounted ribs
The flow over ribs consists of a forward-facing step followed by a backward-facing step. The interaction between the aerodynamics of these two canonical obstacles leads to complex patterns in an oscillating flow which depend on rib length. In order to study the aerodynamics of ribs, four steps were taken which involve multiple forms of velocity and pressure measurements. To begin, a method to estimate pressure fields from particle image velocimetry is applied and validated against pressure measurements. This provides pressure information necessary for the rest of the study. Second, the characteristics of the flow over ribs of varying length are studied in a statistical sense. Trends identified in previous work were found and extended to new quantities. The effect of free-stream turbulence on the characteristics of the flow is studied. It highlights the sensitivity of separation over short obstacles to free-stream turbulence in contrast with the unchanging separation over longer obstacles. Finally, the relationship between pressure and velocity is described using modelling of velocity components from surface pressure information. It shows that individual patterns in velocity fluctuations such as vortex shedding and shear layer flapping are closely linked to surface pressure fluctuations.
University of Southampton
Van Der Kindere, Jacques
dc7f8bd2-8112-489b-8c9a-b698139eeebb
Van Der Kindere, Jacques
dc7f8bd2-8112-489b-8c9a-b698139eeebb
Ganapathisubramani, Bharathram
5e69099f-2f39-4fdd-8a85-3ac906827052

Van Der Kindere, Jacques (2017) Aerodynamics of surface-mounted ribs. University of Southampton, Doctoral Thesis, 178pp.

Record type: Thesis (Doctoral)

Abstract

The flow over ribs consists of a forward-facing step followed by a backward-facing step. The interaction between the aerodynamics of these two canonical obstacles leads to complex patterns in an oscillating flow which depend on rib length. In order to study the aerodynamics of ribs, four steps were taken which involve multiple forms of velocity and pressure measurements. To begin, a method to estimate pressure fields from particle image velocimetry is applied and validated against pressure measurements. This provides pressure information necessary for the rest of the study. Second, the characteristics of the flow over ribs of varying length are studied in a statistical sense. Trends identified in previous work were found and extended to new quantities. The effect of free-stream turbulence on the characteristics of the flow is studied. It highlights the sensitivity of separation over short obstacles to free-stream turbulence in contrast with the unchanging separation over longer obstacles. Finally, the relationship between pressure and velocity is described using modelling of velocity components from surface pressure information. It shows that individual patterns in velocity fluctuations such as vortex shedding and shear layer flapping are closely linked to surface pressure fluctuations.

Text
FINAL E-THESIS FOR E-PRINTS VAN DER KINDERE 23514299 - Accepted Manuscript
Available under License University of Southampton Thesis Licence.
Download (35MB)

More information

Published date: July 2017

Identifiers

Local EPrints ID: 416112
URI: http://eprints.soton.ac.uk/id/eprint/416112
PURE UUID: 44a28fbf-9944-4114-b8bd-990c20cf4792
ORCID for Bharathram Ganapathisubramani: ORCID iD orcid.org/0000-0001-9817-0486

Catalogue record

Date deposited: 04 Dec 2017 17:30
Last modified: 16 Mar 2024 04:04

Export record

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 http://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.

×