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

Akiko Matsuo, Kozo Fujii

研究成果: Article査読

31 被引用数 (Scopus)

抄録

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.

本文言語English
ページ(範囲)1828-1835
ページ数8
ジャーナルAIAA journal
33
10
DOI
出版ステータスPublished - 1995 10月
外部発表はい

ASJC Scopus subject areas

  • 航空宇宙工学

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