Experimental Investigation of Puffing/Microexplosion in Fuel Droplets and Effects of Injection Modes on It

Puffing/microexplosion potentially increases atomization and enables better air�fuel mixing in sprays, thereby improving combustion.In this paper, we have investigated the physics leading to puffing and microexplosion in fuel droplets and identified factors such as droplet detachment modes and dro...

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Main Authors: Nissar, Z., Aziz, A.R.A., Heikal, M.R., Ismael, M.A.
Format: Article
Published: 2023
Online Access:http://scholars.utp.edu.my/id/eprint/34209/
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85140750461&doi=10.1007%2f978-981-19-1939-8_13&partnerID=40&md5=1aa9788e39c0b104c8663d82a6c47a09
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spelling oai:scholars.utp.edu.my:342092023-01-04T02:51:56Z http://scholars.utp.edu.my/id/eprint/34209/ Experimental Investigation of Puffing/Microexplosion in Fuel Droplets and Effects of Injection Modes on It Nissar, Z. Aziz, A.R.A. Heikal, M.R. Ismael, M.A. Puffing/microexplosion potentially increases atomization and enables better airâ��fuel mixing in sprays, thereby improving combustion.In this paper, we have investigated the physics leading to puffing and microexplosion in fuel droplets and identified factors such as droplet detachment modes and droplet-air interaction that influence puffing/microexplosion.A microsyringe is used to inject droplets as small as 100 μm radius in a control volume chamber maintained at 500 â�� and atmospheric pressure.Droplet dynamics are captured using high-speed camera coupled with a long-distance microscopic lens using backlight illumination technique as the droplet traverses and undergoes puffing and microexplosion.In-house image processing codes are used to track droplet motion and compute its geometrical parameters, which enable us to decipher microexplosion dynamics.During this study, two significant factors were identified to cause puffing/microexplosion; thinning of droplet shell and interfacial instabilities.A general trend of increasing puffing times was observed with increasing droplet radii.The modes of detachment do affect the instabilities at the droplet surface which further amplify them and causes early puffing.Furthermore, the rate of bubble growth was amplified for the droplets traversing at higher Reynolds number. © 2023, Institute of Technology PETRONAS Sdn Bhd. 2023 Article NonPeerReviewed Nissar, Z. and Aziz, A.R.A. and Heikal, M.R. and Ismael, M.A. (2023) Experimental Investigation of Puffing/Microexplosion in Fuel Droplets and Effects of Injection Modes on It. Lecture Notes in Mechanical Engineering. pp. 147-160. https://www.scopus.com/inward/record.uri?eid=2-s2.0-85140750461&doi=10.1007%2f978-981-19-1939-8_13&partnerID=40&md5=1aa9788e39c0b104c8663d82a6c47a09 10.1007/978-981-19-1939-8₁₃ 10.1007/978-981-19-1939-8₁₃
institution Universiti Teknologi Petronas
building UTP Resource Centre
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Petronas
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url_provider http://eprints.utp.edu.my/
description Puffing/microexplosion potentially increases atomization and enables better air�fuel mixing in sprays, thereby improving combustion.In this paper, we have investigated the physics leading to puffing and microexplosion in fuel droplets and identified factors such as droplet detachment modes and droplet-air interaction that influence puffing/microexplosion.A microsyringe is used to inject droplets as small as 100 μm radius in a control volume chamber maintained at 500 � and atmospheric pressure.Droplet dynamics are captured using high-speed camera coupled with a long-distance microscopic lens using backlight illumination technique as the droplet traverses and undergoes puffing and microexplosion.In-house image processing codes are used to track droplet motion and compute its geometrical parameters, which enable us to decipher microexplosion dynamics.During this study, two significant factors were identified to cause puffing/microexplosion; thinning of droplet shell and interfacial instabilities.A general trend of increasing puffing times was observed with increasing droplet radii.The modes of detachment do affect the instabilities at the droplet surface which further amplify them and causes early puffing.Furthermore, the rate of bubble growth was amplified for the droplets traversing at higher Reynolds number. © 2023, Institute of Technology PETRONAS Sdn Bhd.
format Article
author Nissar, Z.
Aziz, A.R.A.
Heikal, M.R.
Ismael, M.A.
spellingShingle Nissar, Z.
Aziz, A.R.A.
Heikal, M.R.
Ismael, M.A.
Experimental Investigation of Puffing/Microexplosion in Fuel Droplets and Effects of Injection Modes on It
author_facet Nissar, Z.
Aziz, A.R.A.
Heikal, M.R.
Ismael, M.A.
author_sort Nissar, Z.
title Experimental Investigation of Puffing/Microexplosion in Fuel Droplets and Effects of Injection Modes on It
title_short Experimental Investigation of Puffing/Microexplosion in Fuel Droplets and Effects of Injection Modes on It
title_full Experimental Investigation of Puffing/Microexplosion in Fuel Droplets and Effects of Injection Modes on It
title_fullStr Experimental Investigation of Puffing/Microexplosion in Fuel Droplets and Effects of Injection Modes on It
title_full_unstemmed Experimental Investigation of Puffing/Microexplosion in Fuel Droplets and Effects of Injection Modes on It
title_sort experimental investigation of puffing/microexplosion in fuel droplets and effects of injection modes on it
publishDate 2023
url http://scholars.utp.edu.my/id/eprint/34209/
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85140750461&doi=10.1007%2f978-981-19-1939-8_13&partnerID=40&md5=1aa9788e39c0b104c8663d82a6c47a09
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score 13.214268