Computational study of large-disturbance oscillations in unsteady supersonic combustion around projectiles

Akiko Matsuo, Kozo Fujii

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

Unsteady combustion around a spherical projectile in supersonic flows is numerically studied using the simplified two-step chemical reaction model consisting of the induction and the exothermic reactions. A series of simulations indicates that the intensity of the concentration of the heat release is a key parameter to determine the regime of the unsteady flowfield. Flow features of the unsteady combustion with low-frequency and high-amplitude oscillation, which is called the large-disturbance regime, are reproduced when the concentration of the heat release of the chemical reaction is high. Mechanism of the large-disturbance regime is clarified based on the histories of the density and pressure profiles on the stagnation streamline and the flowfield in front of the projectile body. The period and amplitude of the oscillation corresponding to the shock pressure behind the bow shock agree with experimental observations, and the reproduction of the large-disturbance regime in the present simulation is confirmed.

Original languageEnglish
Pages (from-to)1828-1835
Number of pages8
JournalAIAA Journal
Volume33
Issue number10
Publication statusPublished - 1995 Oct
Externally publishedYes

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Projectiles
Chemical reactions
Exothermic reactions
Supersonic flow
Hot Temperature

ASJC Scopus subject areas

  • Aerospace Engineering

Cite this

Computational study of large-disturbance oscillations in unsteady supersonic combustion around projectiles. / Matsuo, Akiko; Fujii, Kozo.

In: AIAA Journal, Vol. 33, No. 10, 10.1995, p. 1828-1835.

Research output: Contribution to journalArticle

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