Staff View: Development and validation of a compact biodiesel surrogate fuel model for multi-dimensional cfd applications / Poon Hiew Mun

Development and validation of a compact biodiesel surrogate fuel model for multi-dimensional cfd applications / Poon Hiew Mun

This work reports the development of a reduced biodiesel surrogate fuel model for multi-dimensional computational fluid dynamics (CFD) simulations. The model is derived using an integrated chemical kinetic mechanism reduction scheme and the final chemistry comprises 84 species with 264 elementary re...

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Main Author:	Poon, Hiew Mun
Format:	Thesis
Published:	2019
Subjects:	TJ Mechanical engineering and machinery
Online Access:	http://studentsrepo.um.edu.my/11425/1/Poon_Hiew_Mun.jpg http://studentsrepo.um.edu.my/11425/8/hiew_mun.pdf http://studentsrepo.um.edu.my/11425/
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spelling	my.um.stud.114252020-07-14T18:55:43Z Development and validation of a compact biodiesel surrogate fuel model for multi-dimensional cfd applications / Poon Hiew Mun Poon, Hiew Mun TJ Mechanical engineering and machinery This work reports the development of a reduced biodiesel surrogate fuel model for multi-dimensional computational fluid dynamics (CFD) simulations. The model is derived using an integrated chemical kinetic mechanism reduction scheme and the final chemistry comprises 84 species with 264 elementary reactions. The model is first validated in zero-dimensional (0-D) chemical kinetic calculations under a wide range of auto-ignition and jet-stirred reactor (JSR) conditions. The ignition delays (ID) and species profiles computed by the reduced model are in well agreement with those of the detailed model. Apart from that, the experimental species profiles of rapeseed methyl ester (RME) oxidation in a JSR are also reasonably reproduced. Subsequently, the fidelity of the model is further assessed in two-dimensional (2-D) CFD simulations of a constant volume combustion chamber at two ambient temperatures of 900 K and 1000 K. The surrogate model is validated against the experimental results of soy-methyl ester (SME) combustion using the corresponding fuel compositions. Comparisons of the computations with the experimental measurements reveal that ID, lift-off lengths (LOL) and soot volume fractions are reasonably well replicated by the model. Following that, the applicability of the reduced model to serve as a universal surrogate model for other biodiesel feed-stocks, such as palm-methyl ester (PME) and sunflower-methyl ester (SFME), is investigated. The compositions of the reduced model are varied according to the saturation/unsaturation levels in each fuel. Each configuration is first validated in 0-D kinetic simulations, followed by the 2-D spray combustion simulations. The findings show that the calculated IDs and LOLs decrease with increasing unsaturation level. Soot formation is also enhanced with the presence of greater amount of unsaturated ester. In this work, it is demonstrated that the reduced model can potentially be used to predict the reactivity of biodiesel feed-stocks with low degree of saturation (≤ 30 %) in both kinetic and CFD spray simulations. 2019-12 Thesis NonPeerReviewed application/pdf http://studentsrepo.um.edu.my/11425/1/Poon_Hiew_Mun.jpg application/pdf http://studentsrepo.um.edu.my/11425/8/hiew_mun.pdf Poon, Hiew Mun (2019) Development and validation of a compact biodiesel surrogate fuel model for multi-dimensional cfd applications / Poon Hiew Mun. Masters thesis, University Malaya. http://studentsrepo.um.edu.my/11425/
institution	Universiti Malaya
building	UM Library
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	Universiti Malaya
content_source	UM Student Repository
url_provider	http://studentsrepo.um.edu.my/
topic	TJ Mechanical engineering and machinery
spellingShingle	TJ Mechanical engineering and machinery Poon, Hiew Mun Development and validation of a compact biodiesel surrogate fuel model for multi-dimensional cfd applications / Poon Hiew Mun
description	This work reports the development of a reduced biodiesel surrogate fuel model for multi-dimensional computational fluid dynamics (CFD) simulations. The model is derived using an integrated chemical kinetic mechanism reduction scheme and the final chemistry comprises 84 species with 264 elementary reactions. The model is first validated in zero-dimensional (0-D) chemical kinetic calculations under a wide range of auto-ignition and jet-stirred reactor (JSR) conditions. The ignition delays (ID) and species profiles computed by the reduced model are in well agreement with those of the detailed model. Apart from that, the experimental species profiles of rapeseed methyl ester (RME) oxidation in a JSR are also reasonably reproduced. Subsequently, the fidelity of the model is further assessed in two-dimensional (2-D) CFD simulations of a constant volume combustion chamber at two ambient temperatures of 900 K and 1000 K. The surrogate model is validated against the experimental results of soy-methyl ester (SME) combustion using the corresponding fuel compositions. Comparisons of the computations with the experimental measurements reveal that ID, lift-off lengths (LOL) and soot volume fractions are reasonably well replicated by the model. Following that, the applicability of the reduced model to serve as a universal surrogate model for other biodiesel feed-stocks, such as palm-methyl ester (PME) and sunflower-methyl ester (SFME), is investigated. The compositions of the reduced model are varied according to the saturation/unsaturation levels in each fuel. Each configuration is first validated in 0-D kinetic simulations, followed by the 2-D spray combustion simulations. The findings show that the calculated IDs and LOLs decrease with increasing unsaturation level. Soot formation is also enhanced with the presence of greater amount of unsaturated ester. In this work, it is demonstrated that the reduced model can potentially be used to predict the reactivity of biodiesel feed-stocks with low degree of saturation (≤ 30 %) in both kinetic and CFD spray simulations.
format	Thesis
author	Poon, Hiew Mun
author_facet	Poon, Hiew Mun
author_sort	Poon, Hiew Mun
title	Development and validation of a compact biodiesel surrogate fuel model for multi-dimensional cfd applications / Poon Hiew Mun
title_short	Development and validation of a compact biodiesel surrogate fuel model for multi-dimensional cfd applications / Poon Hiew Mun
title_full	Development and validation of a compact biodiesel surrogate fuel model for multi-dimensional cfd applications / Poon Hiew Mun
title_fullStr	Development and validation of a compact biodiesel surrogate fuel model for multi-dimensional cfd applications / Poon Hiew Mun
title_full_unstemmed	Development and validation of a compact biodiesel surrogate fuel model for multi-dimensional cfd applications / Poon Hiew Mun
title_sort	development and validation of a compact biodiesel surrogate fuel model for multi-dimensional cfd applications / poon hiew mun
publishDate	2019
url	http://studentsrepo.um.edu.my/11425/1/Poon_Hiew_Mun.jpg http://studentsrepo.um.edu.my/11425/8/hiew_mun.pdf http://studentsrepo.um.edu.my/11425/
_version_	1738506482708643840
score	13.211869

Development and validation of a compact biodiesel surrogate fuel model for multi-dimensional cfd applications / Poon Hiew Mun

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