Distribution of thermal energy of child-droplets issued from an optimal micro-explosion

Date

2014-10-01

Author

Tarlet, Dominique
Mura, Ernesto
Josset, Christophe
Bellettre, Jerome
Allouis, Christophe Gerard
Massoli, Patrizio

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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

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The micro-explosion phenomenon is involved in emulsified fuel droplets placed in a hot atmosphere, such as spray combustion. Droplets of water-in-sunflower oil emulsion are used, since they are representative of a class of emulsions used in practical applications of biofuels. Once the micro-explosion is triggered after a short delay, the rapid (<= 1 ms) vaporization of the inside water droplets and the subsequent disintegration of the emulsion droplet blow the fragmented droplets away. These fragmented droplets are called "child-droplets", and they are too small and fast for an on-the-fly infra-red imaging thermal characterization. The present study focuses on the thermal reaction of a thin plate when impacted by them. Thorough and detailed tests are carried out, to make sure that the plate and the acquisition system are collecting a data that is actually representative of the child-droplets thermal energy. A quantitative post-processing is applied to the transient temperature field on the plate. It leads to the thermal energy of the whole plate, and of representative samples of individual child-droplets. The results show that their thermal energy is governed by a log-normal distribution. (C) 2014 Elsevier Ltd. All rights reserved.

URI

https://hdl.handle.net/11511/89867

Journal

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER

DOI

https://doi.org/10.1016/j.ijheatmasstransfer.2014.06.054

Collections

Department of Mechanical Engineering, Article

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Citation Formats

D. Tarlet, E. Mura, C. Josset, J. Bellettre, C. G. Allouis, and P. Massoli, “Distribution of thermal energy of child-droplets issued from an optimal micro-explosion,” INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, pp. 1043–1054, 2014, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/89867.