Scholarlink

Abstract <p>This paper presents a methodology for simulating detonation initiation in acetylene–oxygen mixtures by a small-diameter sphere flying with a velocity exceeding the Chapman–Jouguet detonation velocity. A reduced chemical kinetic scheme is tested against experimental data on the ignition delay time, detonation velocity, and detonation cell size of the mixture. For an acetylene–oxygen mixture diluted with argon, the experimentally observed oblique detonation and combustion regimes were obtained in the pressure range from 21.1 to 60.7 kPa. The energy of detonation initiation by a high-velocity projectile is estimated showing agreement between analytical, simulation, and experimental data. Based on this estimate, oblique detonation initiation by a high-velocity projectile in an acetylene–air mixture is calculated. A correlation is obtained between the numerically predicted flow regimes and analytical estimates.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Validation of a Simplified Kinetic Mechanism for Simulating Regimes of Oblique Detonation Waves in Acetylene–Oxygen Mixtures

  • 期刊论文

  • 发表日期：

    2025年6月1日

查看全文
  • I. A. Bedarev,
  • V. M. Temerbekov

摘要

Abstract

This paper presents a methodology for simulating detonation initiation in acetylene–oxygen mixtures by a small-diameter sphere flying with a velocity exceeding the Chapman–Jouguet detonation velocity. A reduced chemical kinetic scheme is tested against experimental data on the ignition delay time, detonation velocity, and detonation cell size of the mixture. For an acetylene–oxygen mixture diluted with argon, the experimentally observed oblique detonation and combustion regimes were obtained in the pressure range from 21.1 to 60.7 kPa. The energy of detonation initiation by a high-velocity projectile is estimated showing agreement between analytical, simulation, and experimental data. Based on this estimate, oblique detonation initiation by a high-velocity projectile in an acetylene–air mixture is calculated. A correlation is obtained between the numerically predicted flow regimes and analytical estimates.