Acoustic damping rate measurements in binary mixtures of atomic species via transient-grating spectroscopy

Yuanyuan Li, William L. Roberts*, Michael S. Brown, James R. Gord

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

The objective of this work is to investigate the ability of transient-grating spectroscopy (TGS) to measure accurately the acoustic damping rate by analyzing the temporal behavior of laser-induced gratings. Experiments are performed in a binary gaseous mixture, with a trace amount of NO 2, as a function of both composition and pressure. Measured and theoretically calculated acoustic damping rates are compared using both a classical model and a more comprehensive model that included additional diffusive mechanisms. The TGS technique demonstrated here provides a nearly instantaneous measurement with reasonably high spatial resolution. The experimental data agree well with theoretical predictions.

Original languageEnglish (US)
Pages (from-to)687-693
Number of pages7
JournalExperiments in Fluids
Volume39
Issue number4
DOIs
StatePublished - Oct 2005
Externally publishedYes

Keywords

  • Acoustic dissipation
  • Laser-induced thermal acoustics
  • Optical diagnostics
  • Transient-grating spectroscopy

ASJC Scopus subject areas

  • Mechanical Engineering
  • Fluid Flow and Transfer Processes
  • Mechanics of Materials
  • Computational Mechanics

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