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Energies 2018, 11(12), 3307; https://doi.org/10.3390/en11123307

Impact of Holder Materials on the Heating and Explosive Breakup of Two-Component Droplets

1
National Research Tomsk Polytechnic University, Tomsk 634050, Russia
2
Université de Nantes, Rue Christian Pauc, BP 50609, 44306 Nantes CEDEX 3, France
3
Istituto Motori–Consiglio Nazionale delle Ricerche, Via Marconi 8, 80125 Napoli, Italy
*
Author to whom correspondence should be addressed.
Received: 25 October 2018 / Revised: 20 November 2018 / Accepted: 23 November 2018 / Published: 27 November 2018
(This article belongs to the Special Issue Sustainability of Fossil Fuels)
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Abstract

The heating of two-component droplets and the following explosive breakup of those droplets have been extensively studied over the most recent years. These processes are of high interest, since they can significantly improve the performance of many technologies in fuel ignition, thermal and flame liquid treatment, heat carriers based on flue gases, vapors and water droplets, etc. Research throughout the world involves various schemes of droplet heating and supply (or, less frequently, injection) to heating chambers. The most popular scheme features the introduction of a two-component or multi-component droplet onto a holder into the heating chamber. In this research, we study how holder materials affect the conditions and integral characteristics of droplet heating and explosive breakup: heating time until boiling temperature; minimum temperature sufficient for droplet breakup; number and size of fragments in the resulting droplet aerosol, etc. Experiments involve droplets that are produced from flammable (oil) and non-flammable (water) components with significantly different thermophysical and optical properties, as well as boiling temperature and heat of vaporization. The most popular elements with the scientific community, such as ceramic, steel, aluminum, copper, and phosphorus rods, as well as a nichrome wire, serve as holders. We establish the roles of energy inflow from a holder to a droplet, and energy outflow in the opposite direction. We compare the holder results with a supporting thermocouple, recording the drop temperature under a heat transfer provided at 350°C. Finally, we forecast the conditions that are required for a significant improvement in the performance of thermal and flame water treatment through the explosive breakup of two-component droplets. View Full-Text
Keywords: two-component droplet; heating; evaporation; explosive breakup; disintegration; droplet holder material two-component droplet; heating; evaporation; explosive breakup; disintegration; droplet holder material
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Antonov, D.; Bellettre, J.; Tarlet, D.; Massoli, P.; Vysokomornaya, O.; Piskunov, M. Impact of Holder Materials on the Heating and Explosive Breakup of Two-Component Droplets. Energies 2018, 11, 3307.

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