Numerical Study on Direct Initiation of Cylindrical Detonation in H2/O2 Mixtures: Effect of Higher-Order Schemes on Detonation Propagation

Tomotaka Niibo, Youhi Morii, Makoto Ashahara, Nobuyuki Tsuboi, A. Koichi Hayashi

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

This aim of this study is to investigate the effect of grid resolution and higher-order accuracy schemes. The size of the reaction induction zone at the time of the local explosion affects the generation of transverse cells. When the reaction zone is large, transverse cells appear. As a result, for calculations in which the grid width is small or for a higher-order scheme, such as a weighted compact nonlinear scheme (WCNS), is used, the cell size increases; an irregular cellular structure is obtained, such as that observed in experiments; and unburned gas pockets and circulation structures caused by Kelvin–Helmholtz instability appear behind the detonation front. In terms of the computational cost, the computational time of 7th-order WCNS is approximately three times that of the 2nd-order monotone upstream-centered schemes for conservation laws (MUSCL) scheme.

Original languageEnglish
Pages (from-to)2044-2059
Number of pages16
JournalCombustion science and technology
Volume188
Issue number11-12
DOIs
Publication statusPublished - 2016 Dec 1
Externally publishedYes

Keywords

  • Detonation
  • Direct initiation
  • Grid resolution
  • Weighted compact nonlinear scheme (WCNS)

ASJC Scopus subject areas

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

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