On the temporal analysis of acoustic waves using schlieren imaging

Chetan Jagadeesh; Erwin R. Gowree; Hesamaldin Jadidbonab; Christopher J. Atkin

doi:10.1016/j.measurement.2017.11.018

On the temporal analysis of acoustic waves using schlieren imaging

Chetan Jagadeesh, Erwin R. Gowree, Hesamaldin Jadidbonab, Christopher J. Atkin

Research output: Contribution to journal › Article › peer-review

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Abstract

The primary objective of the present study was to develop a quantitative schlieren-imaging technique that can be used to study the dynamics of instability waves. The technique was initially validated by optically capturing a controlled acoustic wave generated by a compression driver and excellent agreement was obtained with microphone measurements. An underexpanded jet was considered as an ideal test case due to the complexity and multitude of instability mechanism. Further analysis of the underexpanded jet demonstrated that this technique can be used to capture the very high frequency mode related to the phenomenon of screech.

Original language	English
Pages (from-to)	507-513
Number of pages	7
Journal	Measurement
Volume	116
Early online date	10 Nov 2017
DOIs	https://doi.org/10.1016/j.measurement.2017.11.018
Publication status	Published - Feb 2018

Keywords

Acoustic waves
Schlieren technique
Image processing
Underexpanded jets
SCREECH
JETS

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10.1016/j.measurement.2017.11.018

2018 Meas SchlierenAccepted author manuscript, 1.42 MBLicence: CC BY-NC-ND

Chris Atkin
- C.Atkinuea.acuk
- School of Engineering, Mathematics and Physics - Professor of Engineering and Head of Engineering
- Fluids & Structures - Member
- Sustainable Energy - Member
Person: Research Group Member, Academic, Teaching & Research

Cite this

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title = "On the temporal analysis of acoustic waves using schlieren imaging",

abstract = "The primary objective of the present study was to develop a quantitative schlieren-imaging technique that can be used to study the dynamics of instability waves. The technique was initially validated by optically capturing a controlled acoustic wave generated by a compression driver and excellent agreement was obtained with microphone measurements. An underexpanded jet was considered as an ideal test case due to the complexity and multitude of instability mechanism. Further analysis of the underexpanded jet demonstrated that this technique can be used to capture the very high frequency mode related to the phenomenon of screech.",

keywords = "Acoustic waves, Schlieren technique, Image processing, Underexpanded jets, SCREECH, JETS",

author = "Chetan Jagadeesh and Gowree, {Erwin R.} and Hesamaldin Jadidbonab and Atkin, {Christopher J.}",

year = "2018",

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doi = "10.1016/j.measurement.2017.11.018",

language = "English",

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T1 - On the temporal analysis of acoustic waves using schlieren imaging

AU - Jagadeesh, Chetan

AU - Gowree, Erwin R.

AU - Jadidbonab, Hesamaldin

AU - Atkin, Christopher J.

PY - 2018/2

Y1 - 2018/2

N2 - The primary objective of the present study was to develop a quantitative schlieren-imaging technique that can be used to study the dynamics of instability waves. The technique was initially validated by optically capturing a controlled acoustic wave generated by a compression driver and excellent agreement was obtained with microphone measurements. An underexpanded jet was considered as an ideal test case due to the complexity and multitude of instability mechanism. Further analysis of the underexpanded jet demonstrated that this technique can be used to capture the very high frequency mode related to the phenomenon of screech.

AB - The primary objective of the present study was to develop a quantitative schlieren-imaging technique that can be used to study the dynamics of instability waves. The technique was initially validated by optically capturing a controlled acoustic wave generated by a compression driver and excellent agreement was obtained with microphone measurements. An underexpanded jet was considered as an ideal test case due to the complexity and multitude of instability mechanism. Further analysis of the underexpanded jet demonstrated that this technique can be used to capture the very high frequency mode related to the phenomenon of screech.

KW - Acoustic waves

KW - Schlieren technique

KW - Image processing

KW - Underexpanded jets

KW - SCREECH

KW - JETS

U2 - 10.1016/j.measurement.2017.11.018

DO - 10.1016/j.measurement.2017.11.018

M3 - Article

VL - 116

SP - 507

EP - 513

JO - Measurement

JF - Measurement

SN - 0263-2241

ER -

On the temporal analysis of acoustic waves using schlieren imaging

Abstract

Keywords

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Chris Atkin

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