Study of Underexpanded Supersonic Jets with Optical Techniques

Mitchell, D., Honnery, D and Soria, J. (2007). Study of Underexpanded Supersonic Jets with Optical Techniques. 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, (217-224). 3-7 December, 2007.

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Author Mitchell, D.
Honnery, D
Soria, J.
Title of paper Study of Underexpanded Supersonic Jets with Optical Techniques
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 217
End page 224
Total pages 8
Collection year 2007
Language eng
Abstract/Summary An experimental investigation of underexpanded axissymmetric supersonic jets is presented. Particle Image Velocimetry is used to obtain quantitative measurements of the velocity field, while a high framerate shadowgraph technique is used to assess shock position and stability. The PIV technique demonstrates the ability to consistently resolve the instantaneous velocity field, with major flow characteristics such as shock structures clearly evident. The shadowgraph images show that at lower pressures the shock structures are highly unstable, demonstrating periodic oscillation in angle and position, while in the highly underexpanded condition the location of the Mach disk is stable. A discussion of limitation due to optical resolution and particle fidelity is presented, concluding that the system is more limited by inadequate particle fidelity post-shock than sensor limitations.
Subjects 290501 Mechanical Engineering
290200 Aerospace Engineering
Q-Index Code E1
Q-Index Status Provisional Code
Institutional Status Unknown

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Created: Tue, 18 Dec 2007, 15:40:24 EST by Laura McTaggart on behalf of School of Engineering