Experiments on Dissimilar Valve Lift (DVL) for Turbulence Increment on a Bi-Fuel Compressed Natural Gas (CNG) Engine

Current engines are readily available for CNG bi-fuel conversions because it requires only minor engine modifications. However, CNG flame speed is lower than gasoline, therefore reducing the power and range of the vehicle when operating on CNG. This situation can be improved by increasing the flame...

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Main Authors:	D., Ramasamy, K., Kadirgama, M. M., Noor
Format:	Article
Language:	English
Published:	Trans Tech Publications, Switzerland 2017
Subjects:	TL Motor vehicles. Aeronautics. Astronautics
Online Access:	http://umpir.ump.edu.my/id/eprint/18598/ http://umpir.ump.edu.my/id/eprint/18598/ http://umpir.ump.edu.my/id/eprint/18598/ http://umpir.ump.edu.my/id/eprint/18598/1/fkm-2017-ramasamy-Experiments%20on%20Dissimilar%20Valve%20Lift1.pdf

id	ump-18598
recordtype	eprints
spelling	ump-185982018-01-30T23:57:41Z http://umpir.ump.edu.my/id/eprint/18598/ Experiments on Dissimilar Valve Lift (DVL) for Turbulence Increment on a Bi-Fuel Compressed Natural Gas (CNG) Engine D., Ramasamy K., Kadirgama M. M., Noor TL Motor vehicles. Aeronautics. Astronautics Current engines are readily available for CNG bi-fuel conversions because it requires only minor engine modifications. However, CNG flame speed is lower than gasoline, therefore reducing the power and range of the vehicle when operating on CNG. This situation can be improved by increasing the flame speed via higher turbulence generated by swirl motion. A computational fluid dynamics (CFD) model was used to analyse the swirl generated by dissimilar valve lift (DVL) profiles on the intake valve. A 3D engine simulation shows differences in swirl motion and turbulence between the original symmetric valve lift profile and the DVL. The swirl before combustion was found to increase almost 25%. The higher swirl number can increase the turbulence kinetic energy (TKE) level which improves better fuel mixing. The 1 mm DVL proved to be the better choice from CFD analysis and later was tested on a K3-VE engine. Pressure analysis shows peak pressure increased by 5.6% and burn rate shows CNG had a slower burning speed on the small engine Trans Tech Publications, Switzerland 2017-01-30 Article PeerReviewed application/pdf en http://umpir.ump.edu.my/id/eprint/18598/1/fkm-2017-ramasamy-Experiments%20on%20Dissimilar%20Valve%20Lift1.pdf D., Ramasamy and K., Kadirgama and M. M., Noor (2017) Experiments on Dissimilar Valve Lift (DVL) for Turbulence Increment on a Bi-Fuel Compressed Natural Gas (CNG) Engine. Defect and Diffusion Forum, 370. pp. 19-28. ISSN 1662-9507 https://www.scientific.net/DDF.370.19 10.4028/www.scientific.net/DDF.370.19
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Malaysia Pahang
building	UMP Institutional Repository
collection	Online Access
language	English
topic	TL Motor vehicles. Aeronautics. Astronautics
spellingShingle	TL Motor vehicles. Aeronautics. Astronautics D., Ramasamy K., Kadirgama M. M., Noor Experiments on Dissimilar Valve Lift (DVL) for Turbulence Increment on a Bi-Fuel Compressed Natural Gas (CNG) Engine
description	Current engines are readily available for CNG bi-fuel conversions because it requires only minor engine modifications. However, CNG flame speed is lower than gasoline, therefore reducing the power and range of the vehicle when operating on CNG. This situation can be improved by increasing the flame speed via higher turbulence generated by swirl motion. A computational fluid dynamics (CFD) model was used to analyse the swirl generated by dissimilar valve lift (DVL) profiles on the intake valve. A 3D engine simulation shows differences in swirl motion and turbulence between the original symmetric valve lift profile and the DVL. The swirl before combustion was found to increase almost 25%. The higher swirl number can increase the turbulence kinetic energy (TKE) level which improves better fuel mixing. The 1 mm DVL proved to be the better choice from CFD analysis and later was tested on a K3-VE engine. Pressure analysis shows peak pressure increased by 5.6% and burn rate shows CNG had a slower burning speed on the small engine
format	Article
author	D., Ramasamy K., Kadirgama M. M., Noor
author_facet	D., Ramasamy K., Kadirgama M. M., Noor
author_sort	D., Ramasamy
title	Experiments on Dissimilar Valve Lift (DVL) for Turbulence Increment on a Bi-Fuel Compressed Natural Gas (CNG) Engine
title_short	Experiments on Dissimilar Valve Lift (DVL) for Turbulence Increment on a Bi-Fuel Compressed Natural Gas (CNG) Engine
title_full	Experiments on Dissimilar Valve Lift (DVL) for Turbulence Increment on a Bi-Fuel Compressed Natural Gas (CNG) Engine
title_fullStr	Experiments on Dissimilar Valve Lift (DVL) for Turbulence Increment on a Bi-Fuel Compressed Natural Gas (CNG) Engine
title_full_unstemmed	Experiments on Dissimilar Valve Lift (DVL) for Turbulence Increment on a Bi-Fuel Compressed Natural Gas (CNG) Engine
title_sort	experiments on dissimilar valve lift (dvl) for turbulence increment on a bi-fuel compressed natural gas (cng) engine
publisher	Trans Tech Publications, Switzerland
publishDate	2017
url	http://umpir.ump.edu.my/id/eprint/18598/ http://umpir.ump.edu.my/id/eprint/18598/ http://umpir.ump.edu.my/id/eprint/18598/ http://umpir.ump.edu.my/id/eprint/18598/1/fkm-2017-ramasamy-Experiments%20on%20Dissimilar%20Valve%20Lift1.pdf
first_indexed	2023-09-18T22:26:26Z
last_indexed	2023-09-18T22:26:26Z
_version_	1777415997655875584

Experiments on Dissimilar Valve Lift (DVL) for Turbulence Increment on a Bi-Fuel Compressed Natural Gas (CNG) Engine

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