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Numerical modeling of a fuel droplet for the evaluation of ignition temperature considering transport properties

An analytical method is proposed to estimate the ignition time of the fuel droplet injected in to the combustion chamber of an I.C. engine. The first phase of analysis related to the case of thermal conservation to raise its temperature up to the ignition temperature with non-vaporization from its s...

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Main Authors: Edara, G., Murthy, Y.V.V.S.N., Sharma, K.V., Pullela, S.
Format: Article
Published: Elsevier Ltd 2017
Online Access:https://www.scopus.com/inward/record.uri?eid=2-s2.0-85019219744&doi=10.1016%2fj.csite.2017.05.001&partnerID=40&md5=a55a4531ce162ca4ba9809f94dfc176c
http://eprints.utp.edu.my/19392/
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spelling my.utp.eprints.193922018-04-20T00:41:03Z Numerical modeling of a fuel droplet for the evaluation of ignition temperature considering transport properties Edara, G. Murthy, Y.V.V.S.N. Sharma, K.V. Pullela, S. An analytical method is proposed to estimate the ignition time of the fuel droplet injected in to the combustion chamber of an I.C. engine. The first phase of analysis related to the case of thermal conservation to raise its temperature up to the ignition temperature with non-vaporization from its spherical surface. The ignition temperature depends on the fuel characteristics like specific heat, density, vapor pressure, thermal conductivity, latent heat etc. Subsequently, the mass diffusion of the vapors is included in the investigation. The non -dimensional parameter Fourier number Fo is associated with mass diffusion of vapor from the spherical surface πm-, the convective heat transferπh and the thermal radiation πϵ from the compressed medium are observed to be the significant criteria in determining the ignition time. For a range of parameters analyzed the ignition time is observed to be a fraction of second. The results show that the term dimensionless radius R+ decreases with increase in Fourier number. Further a correlation is established between the non-dimensional numbers Fourier number and πm,πMh, πϵTig+,R+ of the droplet to predict the ignition time is proposed based on the physical configuration of the droplet. © 2017 Published by Elsevier Ltd. Elsevier Ltd 2017 Article PeerReviewed https://www.scopus.com/inward/record.uri?eid=2-s2.0-85019219744&doi=10.1016%2fj.csite.2017.05.001&partnerID=40&md5=a55a4531ce162ca4ba9809f94dfc176c Edara, G. and Murthy, Y.V.V.S.N. and Sharma, K.V. and Pullela, S. (2017) Numerical modeling of a fuel droplet for the evaluation of ignition temperature considering transport properties. Case Studies in Thermal Engineering, 10 . pp. 121-130. http://eprints.utp.edu.my/19392/
institution Universiti Teknologi Petronas
building UTP Resource Centre
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Petronas
content_source UTP Institutional Repository
url_provider http://eprints.utp.edu.my/
description An analytical method is proposed to estimate the ignition time of the fuel droplet injected in to the combustion chamber of an I.C. engine. The first phase of analysis related to the case of thermal conservation to raise its temperature up to the ignition temperature with non-vaporization from its spherical surface. The ignition temperature depends on the fuel characteristics like specific heat, density, vapor pressure, thermal conductivity, latent heat etc. Subsequently, the mass diffusion of the vapors is included in the investigation. The non -dimensional parameter Fourier number Fo is associated with mass diffusion of vapor from the spherical surface πm-, the convective heat transferπh and the thermal radiation πϵ from the compressed medium are observed to be the significant criteria in determining the ignition time. For a range of parameters analyzed the ignition time is observed to be a fraction of second. The results show that the term dimensionless radius R+ decreases with increase in Fourier number. Further a correlation is established between the non-dimensional numbers Fourier number and πm,πMh, πϵTig+,R+ of the droplet to predict the ignition time is proposed based on the physical configuration of the droplet. © 2017 Published by Elsevier Ltd.
format Article
author Edara, G.
Murthy, Y.V.V.S.N.
Sharma, K.V.
Pullela, S.
spellingShingle Edara, G.
Murthy, Y.V.V.S.N.
Sharma, K.V.
Pullela, S.
Numerical modeling of a fuel droplet for the evaluation of ignition temperature considering transport properties
author_facet Edara, G.
Murthy, Y.V.V.S.N.
Sharma, K.V.
Pullela, S.
author_sort Edara, G.
title Numerical modeling of a fuel droplet for the evaluation of ignition temperature considering transport properties
title_short Numerical modeling of a fuel droplet for the evaluation of ignition temperature considering transport properties
title_full Numerical modeling of a fuel droplet for the evaluation of ignition temperature considering transport properties
title_fullStr Numerical modeling of a fuel droplet for the evaluation of ignition temperature considering transport properties
title_full_unstemmed Numerical modeling of a fuel droplet for the evaluation of ignition temperature considering transport properties
title_sort numerical modeling of a fuel droplet for the evaluation of ignition temperature considering transport properties
publisher Elsevier Ltd
publishDate 2017
url https://www.scopus.com/inward/record.uri?eid=2-s2.0-85019219744&doi=10.1016%2fj.csite.2017.05.001&partnerID=40&md5=a55a4531ce162ca4ba9809f94dfc176c
http://eprints.utp.edu.my/19392/
_version_ 1738656063640567808
score 13.244414

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