Wavelet transform analysis of unsteady turbulence and turbulent burning velocity in a constant-volume vessel

Zhong Zhang, Eiji Tomita, Sadami Yoshiyama, Yoshisuke Hamamoto, Hiroaki Kawabata

Research output: Contribution to journalArticle

Abstract

The determination of the turbulence parameters is a difficult and important problem for combustion analysis. In this study, we propose a method of defining unsteady turbulence intensity in order to examine the relation between the turbulence characteristics and the burning velocity of turbulent flame propagating in fuel-air homogeneous mixture. We use the discrete wavelet transform, which is a time-frequency analysis method for calculating the unsteady turbulence intensity and the RI-Spline complex-type wavelet as a mother wavelet. Our experiments show that the definition of the unsteady turbulence intensity is effective for showing unsteady characteristic of turbulence and examining the relation between the unsteady turbulence characteristics and the turbulent burning velocity.

Original languageEnglish
Pages (from-to)2478-2484
Number of pages7
JournalNihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume66
Issue number649
DOIs
Publication statusPublished - Sep 2000
Externally publishedYes

Keywords

  • Burning velocity
  • Internal combustion engine
  • Turbulence
  • Turbulent burning velocity
  • Unsteady turbulence
  • Wavelet transform

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanical Engineering

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