Experimental study of spray deflagration mode in an enclosed compartment

Wang, Changjian; Liu, Haoran; Yang, Shenlin; Guo, Fangpeng; Sun, Hongbing; Liu, Xuanya

doi:10.1016/j.jlp.2017.08.013

Cited by 7 publications

(2 citation statements)

References 6 publications

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“…Aerosol detonation study is important in various aspects, e.g. prevention and mitigation of accidental explosions in the process industries [1]. As well, it is a significant element in recent developments of rotating detonation engines due to the advantages of liquid fuels over gaseous ones [2].…”

Section: Introductionmentioning

confidence: 99%

“…This specific feature was studied in many papers, where the effect was attributed to boundary layer effects [21] or to losses at the tube walls due to the increased length of the reaction zone [11]. 1 Gubin & Sichel [22] hypothesized that only that part of fuel, which had been atomized before the ignition moment, can react instantaneously at the C-J plane. Although the C-J plane position was arbitrarily taken by the authors in the ignition point, the predictions were in a good agreement with the experimental velocity deficit data.…”

Section: Introductionmentioning

confidence: 99%

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Self-sustained regimes of liquid aerosol detonation

Girin¹

2019

Proc. R. Soc. A.

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Main problem of detonation theory, self-sustained regimes finding, is solved for liquid aerosols. Combustion modelling is performed at two scale levels, where the irreversible processes such as aerosol atomization, daughter droplets' evaporation and chemical energy release kinetics are represented at the lower scale. Instability of flow in conjugated boundary layers at drop surface is adopted as mechanism of aerosol atomization. Vapour mixing with oxidizer forms combustible moles, whose chemical induction times are calculated individually, so that the moles are stack-ordered. At the upper scale, equations of overall motion of two-velocity, two-temperature, five-component reacting medium are composed. Two key aspects of the main problem are considered: (i) detonation wave structure in stationary zone is calculated and analysed and (ii) self-sustained regime velocities are determined. The first reveals the existence of two mixture burning modes: explosive kinetic and smooth diffusive, which are separated by conclusive micro-explosion. The second shows the existence of only two front velocity values in aerosol system, at which the interphase processes provide fulfilment of Zeldovich's necessary condition. Explanation is found for incomplete burnout regime: it stands on specific balance between the rate ratio of physical-to-chemical processes, which is reached at such front velocity, when sonic state is attained exactly after the conclusive micro-explosion.

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Section: Introductionmentioning

confidence: 99%