Numerical prediction of envelope oscillation phenomena of shock-induced combustion

Research output: Contribution to journalArticle

Abstract

The envelope oscillation phenomenon, in which both high and low frequency oscillations are observed in the flowfields, of the shock-induced combustion is numerically investigated. The unsteady oscillation mode is classified by the induction time, and axisymmetric flow simulations are carried out. The classification reveals that the period of the envelope oscillation is essentially a low frequency oscillation. Histories on the stagnation streamline of the flow simulations show the low frequency oscillation, but several peaks are observed in one period of the low frequency oscillation. Moreover, the reaction front is always away from the bow shock wave, and the detonable reaction front is not established. The undeveloped detonable reaction front does not erase the corrugated pattern of the reaction boundary. Therefore, both high and low frequency oscillations are observed in the experimental and computational flowfields.

Original languageEnglish
Pages (from-to)140-143
Number of pages4
JournalTransactions of the Japan Society for Aeronautical and Space Sciences
Volume41
Issue number133
Publication statusPublished - 1998 Nov 1

Keywords

  • Shock Wave
  • Shock-Induced Combustion
  • Simulation
  • Unsteady Flow

ASJC Scopus subject areas

  • Aerospace Engineering
  • Space and Planetary Science

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