Ignition method effect on detonation initiation characteristics in a pulse detonation engine

Wang, Zhiwu; Zhang, Yang; Huang, Jingjing; Liang, Zijian; Zheng, Longxi; Lü, Jie

doi:10.1016/j.applthermaleng.2015.09.064

Cited by 45 publications

(2 citation statements)

References 12 publications

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“…As mentioned earlier, the RSCE in this study uses an ignition tube (or most commonly called pre-detonator 20) ) to initiate the ignition process. The tube is 200 mm (7.87 in.)…”

Section: Resultsmentioning

confidence: 99%

Initiation Characteristics of Rotating Supersonic Combustion Engine

Mazlan¹,

Yasin²,

Saat³

et al. 2021

Evergreen

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A rotating supersonic combustion engine (RSCE) is tested with various initiator tube positions along the combustion chamber to determine its impact on the ignition process. The type of fuel used is methane with oxygen as the oxidizer. The initiation of RSCE is assessed for nearstoichiometric methane-oxygen mixture to slightly rich mixture. Successful initiation of rotating supersonic combustion in the RSCE was obtained when the position of the initiator tube is located higher end of the combustion chamber that indicates a proper mixing of reactants. The mixing of reactants improves further up the annulus chamber of the RSCE.

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“…As mentioned earlier, the RSCE in this study uses an ignition tube (or most commonly called pre-detonator 20) ) to initiate the ignition process. The tube is 200 mm (7.87 in.)…”

Section: Resultsmentioning

confidence: 99%

Initiation Characteristics of Rotating Supersonic Combustion Engine

Mazlan¹,

Yasin²,

Saat³

et al. 2021

Evergreen

View full text Add to dashboard Cite

show abstract

“…However, it still encounters some drawbacks including the requirement for an extra gas mixture supply system, which increases the complexity of the device and the possibility of failure in transition to detonation in the combustor compared to other typical ignition methods. 17,18 Generally, a detonation wave achieved by the DDT process is considered a more reliable and efficient method in combustors because of their lower requirement of ignition energy and easy operation within the chamber. 2,6 There are still some fundamental drawbacks with the DDT approach, including a long start time and large combustor length required for a successful DDT.…”

Section: Introductionmentioning

confidence: 99%

Flame–turbulence interactions during flame acceleration using solid and fluid obstacles

et al. 2022

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A combination of solid and transverse jet obstacles is proposed to trigger flame acceleration and deflagration-to-detonation transition (DDT). A numerical study of this approach is performed by solving the reactive Navier-Stokes equations deploying an adaptive mesh refinement technique. A detailed hydrogen-air reaction mechanism with 12 species and 42 steps is employed. The efficiency and mechanisms of the combined obstacles on the flame acceleration are investigated comprehensively. The effects of multiple jets, jet start time, and jet stagnation pressure on the DDT process are studied. Results show that there is a 22.26% improvement in the DDT run-up time and a 33.36% reduction in the DDT run-up distance for the combined obstacles compared to that having only solid obstacles. The jet acts as an obstruction by producing a suitable blockage ratio and introducing an intense turbulent region due to the Kelvin-Helmholtz instability. This leads to dramatic flame-turbulence interactions, increasing the flame surface area dramatically. The dual jet produces mushroom-like vortices, leading to a significantly stretched flame front and intensive Kelvin-Helmholtz instabilities, and therefore these features produce a high flame acceleration. As the jet operation time decreases, the jet obstacle almost changes its role from both physical blockage ratio as well as turbulence and vorticity generator to a physical blockage ratio. There is a moderate jet stagnation pressure that reduces the run-up time to detonation and run-up distance to detonation in the obstacle-laden chamber. While further increasing the jet stagnation pressure, it does not have a positive effect on shortening the detonation transition.

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Investigation on the propagation process of rotating detonation wave

Deng

et al. 2017

Acta Astronautica

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Ignition method effect on detonation initiation characteristics in a pulse detonation engine

Cited by 45 publications

References 12 publications

Initiation Characteristics of Rotating Supersonic Combustion Engine

Initiation Characteristics of Rotating Supersonic Combustion Engine

Flame–turbulence interactions during flame acceleration using solid and fluid obstacles

Investigation on the propagation process of rotating detonation wave

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