Oscillatory bursting of gel fuel droplets in a reacting environment

Abstract Understanding the combustion behavior of gel fuel droplets is pivotal for enhancing burn rates, lowering ignition delay and improving the operational performance of next-generation propulsion systems. Vapor jetting in burning gel fuel droplets is a crucial process that enables an effective...

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Autores principales:	Ankur Miglani, Purushothaman Nandagopalan, Jerin John, Seung Wook Baek
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/dfbd94a25bd2475e9895767c5b779e23
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spelling	oai:doaj.org-article:dfbd94a25bd2475e9895767c5b779e232021-12-02T12:32:37ZOscillatory bursting of gel fuel droplets in a reacting environment10.1038/s41598-017-03221-x2045-2322https://doaj.org/article/dfbd94a25bd2475e9895767c5b779e232017-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-03221-xhttps://doaj.org/toc/2045-2322Abstract Understanding the combustion behavior of gel fuel droplets is pivotal for enhancing burn rates, lowering ignition delay and improving the operational performance of next-generation propulsion systems. Vapor jetting in burning gel fuel droplets is a crucial process that enables an effective transport (convectively) of unreacted fuel from the droplet domain to the flame zone and accelerates the gas-phase mixing process. Here, first we show that the combusting ethanol gel droplets (organic gellant laden) exhibit a new oscillatory jetting mode due to aperiodic bursting of the droplet shell. Second, we show how the initial gellant loading rate (GLR) leads to a distinct shell formation which self-tunes temporally to burst the droplet at different frequencies. Particularly, a weak-flexible shell is formed at low GLR that undergoes successive rupture cascades occurring in same region of the droplet. This region weakens due to repeated ruptures and causes droplet bursting at progressively higher frequencies. Contrarily, high GLRs facilitate a strong-rigid shell formation where consecutive cascades occur at scattered locations across the droplet surface. This leads to droplet bursting at random frequencies. This method of modulating jetting frequency would enable an effective control of droplet trajectory and local fuel-oxidizer ratio in any gel-spray based energy formulation.Ankur MiglaniPurushothaman NandagopalanJerin JohnSeung Wook BaekNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-12 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Ankur Miglani Purushothaman Nandagopalan Jerin John Seung Wook Baek Oscillatory bursting of gel fuel droplets in a reacting environment
description	Abstract Understanding the combustion behavior of gel fuel droplets is pivotal for enhancing burn rates, lowering ignition delay and improving the operational performance of next-generation propulsion systems. Vapor jetting in burning gel fuel droplets is a crucial process that enables an effective transport (convectively) of unreacted fuel from the droplet domain to the flame zone and accelerates the gas-phase mixing process. Here, first we show that the combusting ethanol gel droplets (organic gellant laden) exhibit a new oscillatory jetting mode due to aperiodic bursting of the droplet shell. Second, we show how the initial gellant loading rate (GLR) leads to a distinct shell formation which self-tunes temporally to burst the droplet at different frequencies. Particularly, a weak-flexible shell is formed at low GLR that undergoes successive rupture cascades occurring in same region of the droplet. This region weakens due to repeated ruptures and causes droplet bursting at progressively higher frequencies. Contrarily, high GLRs facilitate a strong-rigid shell formation where consecutive cascades occur at scattered locations across the droplet surface. This leads to droplet bursting at random frequencies. This method of modulating jetting frequency would enable an effective control of droplet trajectory and local fuel-oxidizer ratio in any gel-spray based energy formulation.
format	article
author	Ankur Miglani Purushothaman Nandagopalan Jerin John Seung Wook Baek
author_facet	Ankur Miglani Purushothaman Nandagopalan Jerin John Seung Wook Baek
author_sort	Ankur Miglani
title	Oscillatory bursting of gel fuel droplets in a reacting environment
title_short	Oscillatory bursting of gel fuel droplets in a reacting environment
title_full	Oscillatory bursting of gel fuel droplets in a reacting environment
title_fullStr	Oscillatory bursting of gel fuel droplets in a reacting environment
title_full_unstemmed	Oscillatory bursting of gel fuel droplets in a reacting environment
title_sort	oscillatory bursting of gel fuel droplets in a reacting environment
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/dfbd94a25bd2475e9895767c5b779e23
work_keys_str_mv	AT ankurmiglani oscillatoryburstingofgelfueldropletsinareactingenvironment AT purushothamannandagopalan oscillatoryburstingofgelfueldropletsinareactingenvironment AT jerinjohn oscillatoryburstingofgelfueldropletsinareactingenvironment AT seungwookbaek oscillatoryburstingofgelfueldropletsinareactingenvironment
_version_	1718394068134789120

Oscillatory bursting of gel fuel droplets in a reacting environment

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