Numerical Analyses on Ethylene/Oxygen Detonation with Multistep Chemical Reaction Mechanisms: Grid Resolution and Chemical Reaction Model

Takayuki Araki, Keisuke Yoshida, Youhi Morii, Nobuyuki Tsuboi, A. Koichi Hayashi

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The numerical simulations of one- and two-dimensional inviscid detonations for a stoichiometric ethylene/oxygen gas mixture are performed using the reduced chemical reaction model. VW model 1 and VW model 2 are accurate predictions for the ignition delay time compared with the UC San Diego model. Therefore, VW model 2 with 21 species is selected to simulate the ethylene-fueled detonation. The grid resolution study was validated, and it was found that the Zel'dovich-von Neumann-Doering (ZND) structure of the ethylene detonations contains H2O2 in a very short region. Comparing the species mole fraction profiles of one-dimensional analyses with those of the ZND structure, at least more than 10 points in the ΔH2O2 are required to estimate the chemical process accurately. This means that the grid width of three microns is suitable to simulate the detonations under the initial pressure of 0.01 MPa. The grid resolution of two-dimensional detonation simulations affects the detonation cell size as well as hydrogen-fueled detonations. In the case of a channel width d = 1 mm, the single-head detonations are adequately resolved for Δ = 3 μm. However, the detonation cell width becomes irregular for d = 2 mm and Δ = 3 μm.

Original languageEnglish
Pages (from-to)346-369
Number of pages24
JournalCombustion science and technology
Volume188
Issue number3
DOIs
Publication statusPublished - 2016 Mar 3
Externally publishedYes

Keywords

  • Detonation
  • Ethylene
  • Grid resolution
  • Reduced chemical reaction model

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Numerical Analyses on Ethylene/Oxygen Detonation with Multistep Chemical Reaction Mechanisms: Grid Resolution and Chemical Reaction Model'. Together they form a unique fingerprint.

  • Cite this