Numerical investigations on detonation propagation in a two-dimensional curved channel

Yuta Sugiyama, Yoshio Nakayama, Akiko Matsuo, Hisahiro Nakayama, Jiro Kasahara

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

This article presents numerical results of detonation in a two-dimensional curved channel in order to discuss its propagation behavior and the stable propagation limit. We simulated the detonation with various channel widths in two types of the ratios of inner and outer radii (Rout/Rin), which are 1.5 and 2. Two propagation modes, named as marginal and stable modes, were observed. In marginal mode, curved detonation propagates with repetition of decay, re-ignition, and propagation. Its velocity varies from underdriven to overdriven in one cycle. In a stable mode, the detonation propagates steadily while keeping a curved shock front structure and a constant detonation velocity in the circumferential direction. The idea of quasi-steady solution to the numerical results is applied for stable detonation limit. We confirmed that the detonation propagates steadily in the case that a shock radius of the detonation front is larger than the critical value of quasi-steady solution. ©

Original languageEnglish
Pages (from-to)1662-1679
Number of pages18
JournalCombustion science and technology
Volume186
Issue number10-11
DOIs
Publication statusPublished - 2014 Nov 2

Keywords

  • CFD
  • Curved channel
  • Detonation
  • Geometry effect
  • Propagation behavior

ASJC Scopus subject areas

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

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