Evaluation of OH Emission for Determining Operation of a Rotating Detonation Engine

Feleo, Alexander; Chacon, Fabian; White, Logan; Gamba, Mirko

doi:10.2514/6.2019-2252

Cited by 14 publications

(2 citation statements)

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“…As the detonation waves have high enthalpy and the test model is not equipped with cooling devices, the available test time is up to 0.2 s (5). The pneumatic valves of the gas supply close, and the hot fire test terminates (6). The GN2 purging gas is supplied to the channel to cool down the test model and The maximum difference from the theoretical values in the tri-arc RDE showed 1.4 g/s (6.8%) for the fuel and 1.1 g/s (3.6%) for the oxidizer.…”

Section: Methodsmentioning

confidence: 99%

“…Wen et al [4] investigated the propagation behaviors of rotating detonation in a racetrack RDE by measuring the pressure. Peng et al [5], Feleo et al [6] and Chacon and Gamba [7][8][9] used a racetrack RDE as an optically accessible combustor to visualize detonation waves. Sosa et al used a ρ-shaped cross-section RDE and optically investigated the way in which the detonation wave tangential propagated into the combustion channel [10].…”

Section: Introductionmentioning

confidence: 99%

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Experimental Proof of Concept of a Noncircular Rotating Detonation Engine (RDE) for Propulsion Applications

et al. 2022

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A noncircular engine cross-section could provide great flexibility in the integration of propulsion into the airframe. In this work, a tri-arc RDE was constructed and tested as an example of noncircular cross-sectioned RDE. The operational characteristics of detonation wave propagation and thrust performance were investigated and compared with an equivalent circular RDE under the same operating conditions. High-speed camera images, short-time Fourier transform (STFT), and fast Fourier transform (FFT) were used for the investigation. The tri-arc RDE showed very similar characteristics to the circular RDE but exhibited slightly better stability and propulsion performance than the circular RDE. We consider that repeated curvature changes positively affect the stability of detonation wave propagation. The experimental data show contradicting results from the numerical analysis with a homogeneous mixture assumption in which the detonation pressures at the convex corner were greater than those at the concave corner. It is reasoned that the tri-arc injector design provides a non-uniform mixture composition, resulting in a strong detonation at the convex corner. Overall, the noncircular RDE of a tri-arc shaped cross-section is demonstrated, one which performs slightly better than an ordinary circular-shaped RDE both in detonation stability and performance.

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Section: Methodsmentioning

confidence: 99%