The University of Southampton
University of Southampton Institutional Repository

A parametric study of passive flow control for a short, high area ratio 90 deg cruved diffuser

A parametric study of passive flow control for a short, high area ratio 90 deg cruved diffuser
A parametric study of passive flow control for a short, high area ratio 90 deg cruved diffuser
This paper represents the results of an experimental program with the aim of controlling the flow in a highly unstable 90 deg curved diffuser. The diffuser, which is an integral part of an open jet wind tunnel at the University of Southampton, has the unique configuration of extreme shortness and high area ratio. In this study, several passive flow control devices such as vortex generators, woven wire mesh screens, honeycomb, and guide vanes were employed to control the three-dimensional diffusing flow in a scaled-down model. Although less successful for vortex generators, the other devices were found to improve significantly the uniformity of the flow distribution inside the curved diffuser and hence the exit flow. This study suggests that a cumulative pressure drop coefficient of at least 4.5 at the diffuser exit with at least three guide vanes is required to achieve adequate flow uniformity at the diffuser exit. These flow conditioning treatments were applied to the full-scale diffuser with exit dimensions of 1.3×1.3 m2. Flow with comparable uniformity to the scale-model diffuser is obtained. This study provides valuable guidelines on the design of curved/straight diffusers with nonseparated flow and minimal pressure distortion at the exit.
0098-2202
111104-[12pp]
Chong, T.P.
df7a2c0c-9f56-44dd-b668-8ef83d3e2c0d
Joseph, P.F.
9c30491e-8464-4c9a-8723-2abc62bdf75d
Davies, P.O.A.L.
e2de24e0-483d-49fb-ad50-703548232c61
Chong, T.P.
df7a2c0c-9f56-44dd-b668-8ef83d3e2c0d
Joseph, P.F.
9c30491e-8464-4c9a-8723-2abc62bdf75d
Davies, P.O.A.L.
e2de24e0-483d-49fb-ad50-703548232c61

Chong, T.P., Joseph, P.F. and Davies, P.O.A.L. (2008) A parametric study of passive flow control for a short, high area ratio 90 deg cruved diffuser. Journal of Fluids Engineering, 130 (11), 111104-[12pp]. (doi:10.1115/1.2969447).

Record type: Article

Abstract

This paper represents the results of an experimental program with the aim of controlling the flow in a highly unstable 90 deg curved diffuser. The diffuser, which is an integral part of an open jet wind tunnel at the University of Southampton, has the unique configuration of extreme shortness and high area ratio. In this study, several passive flow control devices such as vortex generators, woven wire mesh screens, honeycomb, and guide vanes were employed to control the three-dimensional diffusing flow in a scaled-down model. Although less successful for vortex generators, the other devices were found to improve significantly the uniformity of the flow distribution inside the curved diffuser and hence the exit flow. This study suggests that a cumulative pressure drop coefficient of at least 4.5 at the diffuser exit with at least three guide vanes is required to achieve adequate flow uniformity at the diffuser exit. These flow conditioning treatments were applied to the full-scale diffuser with exit dimensions of 1.3×1.3 m2. Flow with comparable uniformity to the scale-model diffuser is obtained. This study provides valuable guidelines on the design of curved/straight diffusers with nonseparated flow and minimal pressure distortion at the exit.

This record has no associated files available for download.

More information

Published date: November 2008

Identifiers

Local EPrints ID: 65259
URI: http://eprints.soton.ac.uk/id/eprint/65259
ISSN: 0098-2202
PURE UUID: e1cdcf9e-94be-4a07-818d-e6184cdf2233

Catalogue record

Date deposited: 12 Feb 2009
Last modified: 15 Mar 2024 12:07

Export record

Altmetrics

Contributors

Author: T.P. Chong
Author: P.F. Joseph
Author: P.O.A.L. Davies

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.

×