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

City, University of London

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

4 Citations (Scopus)

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: Journal of the International Measurement Confederation
Volume	116
Early online date	10 Nov 2017
DOIs	https://doi.org/10.1016/j.measurement.2017.11.018
Publication status	Published - 1 Feb 2018
Externally published	Yes

Keywords

Acoustic waves
Image processing
Schlieren technique
Underexpanded jets

ASJC Scopus subject areas

Instrumentation
Electrical and Electronic Engineering

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10.1016/j.measurement.2017.11.018

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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.",

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

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

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AU - Jagadeesh, Chetan

AU - Gowree, Erwin R.

AU - Jadidbonab, Hesamaldin

AU - Atkin, Christopher J.

PY - 2018/2/1

Y1 - 2018/2/1

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 - Image processing

KW - Schlieren technique

KW - Underexpanded jets

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M3 - Article

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SN - 0263-2241

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SP - 507

EP - 513

JO - Measurement: Journal of the International Measurement Confederation

JF - Measurement: Journal of the International Measurement Confederation

ER -

On the temporal analysis of acoustic waves using schlieren imaging

Abstract

Keywords

ASJC Scopus subject areas

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