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Combustion Characteristic in Strut-Cavity Scramjet with a Plasma-Assisted Rocket at Mach 2 Flight Condition

  • Northwestern Polytechnical University Xian

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

This study investigates ignition enhancement strategies for a dual strut/cavity scramjet combustor under simulated Mach 2 flight conditions. To address the low-Mach-number combustion instability challenge, we employ a methane/oxygen rocket's tail flame as a pilot flame combined with plasma jet activation. Experimental results reveal two critical findings: (1) Engine ignition failed without rocket assistance, confirming the necessity of external ignition support at low Mach numbers; (2) Flame flashback occurred in the secondary cavity when local equivalence ratios reached 0.5, correlating with amplified 100Hz pressure oscillations. While plasma injection enhanced kerosene combustion efficiency by intensifying the pilot flame, it simultaneously exacerbated flame flashback and pressure oscillation amplitudes, demonstrating the inherent trade-off between combustion enhancement and stability control in cavity-stabilized systems.

Original languageEnglish
Title of host publicationMechanical and Aerospace Engineering - Proceedings of the 15th International Conference, ICMAE 2024
EditorsPasquale Daponte
PublisherIOS Press BV
Pages66-74
Number of pages9
ISBN (Electronic)9781643685984
DOIs
StatePublished - 16 Jun 2025
Event15th International Conference on Mechanical and Aerospace Engineering, ICMAE 2024 - Zagreb, Croatia
Duration: 17 Jul 202420 Jul 2024

Publication series

NameAdvances in Transdisciplinary Engineering
Volume71
ISSN (Print)2352-751X
ISSN (Electronic)2352-7528

Conference

Conference15th International Conference on Mechanical and Aerospace Engineering, ICMAE 2024
Country/TerritoryCroatia
CityZagreb
Period17/07/2420/07/24

Keywords

  • Scramjet
  • flame flashback
  • methane/oxygen rocket
  • plasma jet

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