Research on the combustion organization mechanism of synchronized injection in the upstream and downstream of the cavity in scramjet

Abstract This investigation presents experimental study on the synchronized fuel injection scheme of the upstream and downstream in cavity under the supersonic inflow condition of Mach 2.92, revealing the combustion organization mechanism of the synchronized injection in the scramjet. The results sh...

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Published inJournal of physics. Conference series Vol. 2787; no. 1; pp. 12039 - 12048
Main Authors Li, Chang, Li, Qing, Jin, Yuxiang, Yin, Tianhao
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.06.2024
Subjects
Equivalence ratio
Flame stability
Free radicals
Fuel injection
High temperature
Supersonic combustion ramjet engines
Upstream
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Summary:Abstract This investigation presents experimental study on the synchronized fuel injection scheme of the upstream and downstream in cavity under the supersonic inflow condition of Mach 2.92, revealing the combustion organization mechanism of the synchronized injection in the scramjet. The results show that under the same global equivalence ratio, synchronized injection in the upstream and downstream of the cavity plays an important role in reducing ignition delay, combustion oscillation, and improving flame stability. The combustion of the downstream jet can promote the combustion inside the cavity, especially at the rear edge of the cavity, while the upstream jet can provide a large amount of high-temperature products and free radicals for the downstream jet, greatly promoting the combustion process of the downstream jet.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/2787/1/012039