Numerical investigation on the detonative tangential combustion instability in a rocket combustor

IF 5.8 2区工程技术 Q2 ENERGY & FUELS

Combustion and Flame Pub Date : 2025-03-01 DOI:10.1016/j.combustflame.2025.114092

Bu-Kyeng Sung , Jiro Kasahara , Jeong-Yeol Choi

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Abstract

In this study, Large Eddy Simulation (LES) is employed to investigate the self-excited detonative tangential combustion instability in a laboratory-scale rocket combustor with multiple impinging-type injectors. Auto-ignition was initiated with an initial condition of 2000 K in the combustor. It was found that the pressure fluctuations generated by ignition did not dissipate, instead, a pair of rotating waves in CW and CCW direction are steepened, promoting the interaction between the pressure wave-heat release rate. The interaction between these pressure waves and the heat release further developed the rotational motion of the heat release zone. This rotational motion coupled with the rotating pressure waves, ultimately establishing a dominant rotating direction. The coupled rotating wave and heat release eventually lead to resonant behavior, resulting in the development of detonative tangential mode instability. During limit cycle operation, the observation of a detonation cell structure further confirmed that tangential mode combustion instability can evolve into a rotating detonation. Comparing this evolution process with the deflagration-to-detonation transition (DDT), it was found to closely resemble the DDT process.

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来源期刊

Combustion and Flame 工程技术-工程：化工

CiteScore

9.50

自引率

20.50%

发文量

631

审稿时长

3.8 months

期刊介绍： The mission of the journal is to publish high quality work from experimental, theoretical, and computational investigations on the fundamentals of combustion phenomena and closely allied matters. While submissions in all pertinent areas are welcomed, past and recent focus of the journal has been on: Development and validation of reaction kinetics, reduction of reaction mechanisms and modeling of combustion systems, including: Conventional, alternative and surrogate fuels; Pollutants; Particulate and aerosol formation and abatement; Heterogeneous processes. Experimental, theoretical, and computational studies of laminar and turbulent combustion phenomena, including: Premixed and non-premixed flames; Ignition and extinction phenomena; Flame propagation; Flame structure; Instabilities and swirl; Flame spread; Multi-phase reactants. Advances in diagnostic and computational methods in combustion, including: Measurement and simulation of scalar and vector properties; Novel techniques; State-of-the art applications. Fundamental investigations of combustion technologies and systems, including: Internal combustion engines; Gas turbines; Small- and large-scale stationary combustion and power generation; Catalytic combustion; Combustion synthesis; Combustion under extreme conditions; New concepts.