Space-based microgravity experiments on flame spread over randomly distributed n-decane-droplet clouds: Anomalous behavior in flame spread

Mikami, Masato; Matsumoto, Kodai; Yoshida, Yasuko; Kikuchi, Masao; Dietrich, Daniel L.

doi:10.1016/j.proci.2020.07.139

Cited by 9 publications

(1 citation statement)

References 21 publications

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“…Segawa et al [15] studied experimentally the ignition and early combustion behavior of 49 droplets under microgravity condition. Mikami et al [16,17] reported the droplet interactions in flame spreading characteristics of 100 n-decane droplets under micro-gravity conditions. Manish and Sahu [18] used PIV (particle imaging velocimetry) to measure the group combustion of droplet clusters in spray flames.…”

Section: Introductionmentioning

confidence: 99%

Studies on the flame structure and drag of a combusting droplet group

Zhou¹,

Li²,

Sun³

2023

Combustion Engines

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Droplet combustion has been studied by experiments and numerical simulation for many years, and most of studies were done about single droplets. As for droplet groups, some theoretical and experimental studies were reported, but less of numerical studies. One of the important characteristics is the drag of combusting droplets, which is closely related to flame structure and is a sub-model in numerical simulation of spray combustion. There are contradictory research results for the drag of combusting droplets. In the present paper, large-eddy simulation (LES) is used to study the flame structure and drag of a combusting ethanol-droplet group. The results show that there are three combustion modes: fully-enveloped flame, partially-enveloped flame and wake flame in a droplet group, leading to the change of the drag with inlet velocities. It is found that the drag of droplets in the group is much smaller than that of a non-combusting particle in isothermal flows

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