Aeroacoustics of Aircraft Cavities

Crook, S., Kelso, R. and Drobik, J. (2007). Aeroacoustics of Aircraft Cavities. In: Peter Jacobs, Tim McIntyre, Matthew Cleary, David Buttsworth, David Mee, Rose Clements, Richard Morgan and Charles Lemckert, 16th Australasian Fluid Mechanics Conference (AFMC). 16th Australasian Fluid Mechanics Conference (AFMC), Gold Coast, Queensland, Australia, (429-435). 3-7 December, 2007.

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Author Crook, S.
Kelso, R.
Drobik, J.
Title of paper Aeroacoustics of Aircraft Cavities
Conference name 16th Australasian Fluid Mechanics Conference (AFMC)
Conference location Gold Coast, Queensland, Australia
Conference dates 3-7 December, 2007
Proceedings title 16th Australasian Fluid Mechanics Conference (AFMC)
Place of Publication Brisbane, Australia
Publisher School of Engineering, The University of Queensland
Publication Year 2007
Year available 2007
Sub-type Fully published paper
ISBN 978-1-864998-94-8
Editor Peter Jacobs
Tim McIntyre
Matthew Cleary
David Buttsworth
David Mee
Rose Clements
Richard Morgan
Charles Lemckert
Start page 429
End page 435
Total pages 7
Collection year 2007
Language eng
Abstract/Summary The purpose of this study is to determine the aeroacoustic and fluid-dynamic nature of the flow field in and around a generic aircraft cavity in order to characterise the physical mechanism of noise and vibration generated by the flow. This paper discusses the experimental investigation of a narrow, shallow, rectangular cavity in both wind and water tunnel facilities. The experimental investigation primarily focuses on boundary layer characteristics, surface pressure distributions and surface flow visualisation. Qualitative and quantitative results are discussed. This paper reports results for cavities of length:depth:width ratios of 6:1:2. The principal findings are in agreement with an "open" type flow as stated in the literature, however the flow within the cavity is highly three-dimensional in contrast with the suggestions of Stallings & Wilcox (1987). Significant threedimensionality is also evident downstream of the cavity, close to the training edge. Further findings suggest the shear layer impinges below the edge of the rear wall in the mean, leading to a net inflow of free-stream fluid into the cavity at the centre line, which is balanced by an outflow adjacent to the side walls. Finally, a number of vortices are present at the rear wall, including a corner vortex at the base of the rear wall, and a vortex associated with flow separation on the trailing board adjacent to the rear wall edge.
Subjects 290501 Mechanical Engineering
290200 Aerospace Engineering
Q-Index Code E1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Conference Paper
Collection: 16th Australasian Fluid Mechanics Conference
 
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Created: Wed, 19 Dec 2007, 10:37:36 EST by Laura McTaggart on behalf of School of Engineering