On the temporal analysis of acoustic waves using schlieren imaging

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

Research output: Contribution to journalArticle

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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 languageEnglish
Pages (from-to)507-513
Number of pages7
JournalMeasurement: Interdisciplinary Research and Perspectives
Volume116
Early online date10 Nov 2017
DOIs
Publication statusPublished - Feb 2018

Keywords

  • Acoustic waves
  • Schlieren technique
  • Image processing
  • Underexpanded jets
  • SCREECH
  • JETS

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