JOURNAL ARTICLE

Flame stabilization modes in a cavity-based scramjet combustor with different fuel injection ratios.

  • Published In: Physics of Fluids, 2025, v. 37, n. 4. P. 1 1 of 3

  • Database: Academic Search Ultimate 2 of 3

  • Authored By: Cai, Weiguang; Zheng, Shu; Zhu, Jiajian; Zhao, Li; Sui, Ran; Lu, Qiang 3 of 3

Abstract

This article investigates the effects of varying upstream and downstream fuel injection ratios on flame stabilization modes in a cavity-based scramjet combustor operating at Mach 2.92 with a global equivalence ratio of 0.73. Three injection schemes with kerosene fuel ratios of 3:1, 1:1, and 1:4 (upstream to downstream) were tested, revealing distinct flame stabilization modes: cavity shear layer stabilization at 75% upstream injection, alternating cavity-jet-wake and cavity-assisted shear layer-jet-wake modes at equal injection ratios, and jet-wake stabilization at 20% upstream injection. The study found that equal fuel injection upstream and downstream increased the stable combustion area by over 35% compared to other ratios and resulted in higher flame temperatures, indicating improved combustion stability and efficiency. These findings highlight the importance of fuel injection distribution in optimizing scramjet combustion performance.

Additional Information

  • Source:Physics of Fluids. 2025/04, Vol. 37, Issue 4, p1
  • Document Type:Article
  • Subject Area:Science
  • Publication Date:2025
  • ISSN:1070-6631
  • DOI:10.1063/5.0267595
  • Accession Number:184884424
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