In-hoi KOO, Keon-Hyeong LEE, Jeong-Yeol CHOI

DOI Number: 10.60853/fty5-bx66

Conference number: HiSST-2024-00115

In this study, the operation characteristics of the rotating detonation engine (RDE) are confirmed by the shape of the fuel injector that affects the RDE performance. The experiment utilizes a slit-type fuel injector with a 2-dimensional effect and a hole-type fuel injector with a 3-dimensional effect originating from side vortex such as counter-rotating vortex pairs. It is quite similar to the fuel injection structure of RDE and the transverse jet in supersonic crossflow (JISC). The tendency of the jet penetration affecting the fuel performance was confirmed and quantified. The jet moment ratio of gaseous ethylene injected perpendicularly to the flow of gaseous oxygen was calculated, and the jet penetration height was obtained by using the empirical correlation. The relationship between gaseous ethylene and gaseous oxygen stagnation pressure was derived according to the calculated jet penetration height and RDE channel width. The detonation rate was confirmed by fast Fourier transform (FFT) analysis, and the hole-type fuel injector showed a 10% higher value than the slit-type fuel injector. In addition, when the hole-type experimental results were compared, it was inferred that there was a correlation between the jet moment ratio and the fuel mixing performance.

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In Categories: 1.Events, HiSST 2024, Propulsion Systems and Components
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