Analysis of Compressed Natural Gas Burn Rate and Flame Propagation on a Sub-Compact Vehicle Engine

Analysis of Compressed Natural Gas Burn Rate and Flame Propagation on a Sub-Compact Vehicle Engine

In terms of sub-compact cars using alternative fuels, the vehicle characteristics are governed by the engine operation. The main focus of this paper was to evaluate a subcompact car engine on its performance and burn rate of gasoline and compressed natural gas (CNG) . A bi-fuel sequential system...

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Main Authors: D., Ramasamy, K., Kadirgama, M. M., Rahman, Z. A., Zainal
Format: Article
Language:English
Published: Universiti Malaysia Pahang 2015
Subjects:
TJ Mechanical engineering and machinery
Online Access:http://umpir.ump.edu.my/id/eprint/10965/
http://umpir.ump.edu.my/id/eprint/10965/
http://umpir.ump.edu.my/id/eprint/10965/
http://umpir.ump.edu.my/id/eprint/10965/1/Analysis%20of%20Compressed%20Natural%20Gas%20Burn%20Rate%20and%20Flame%20Propagation%20on%20a%20Sub-Compact%20Vehicle%20Engine.pdf
id ump-10965
recordtype eprints
spelling ump-109652017-12-26T01:56:13Z http://umpir.ump.edu.my/id/eprint/10965/ Analysis of Compressed Natural Gas Burn Rate and Flame Propagation on a Sub-Compact Vehicle Engine D., Ramasamy K., Kadirgama M. M., Rahman Z. A., Zainal TJ Mechanical engineering and machinery In terms of sub-compact cars using alternative fuels, the vehicle characteristics are governed by the engine operation. The main focus of this paper was to evaluate a subcompact car engine on its performance and burn rate of gasoline and compressed natural gas (CNG) . A bi-fuel sequential system was used for this evaluation. Measurements of engine speed, torque and fuel were done on an eddy current dynamometer, while measurements of in-cylinder pressure, crank angle and spark were analyzed from results taken by a data acquisition system. The emissions readings were also compared using an emission analyzer. The results were analyzed for burn rate based on the first law of thermodynamics. A 3-dimensional computational fluid dynamics (CFD) model was done to estimate the flame speed. The comparison shows an average drop of 18.6% for the power, 7% for brake specific fuel consumption (BSFC) and the efficiency loss was 17.3%. Pressure analysis shows peak pressure dropped by 16%. The burn rate shows why CNG had a slower burning speed on the small engine. CFD predicted the flame propagation speed at 8.45 m/s. The engine speed of 4000 rpm at maximum brake torque produced the results nearest to those for gasoline. In conclusion, volumetric losses and CFD errors slightly reduce the accuracy of the results, but nevertheless an 8.45 m/s flame speed was estimated. Universiti Malaysia Pahang 2015 Article PeerReviewed application/pdf en cc_by http://umpir.ump.edu.my/id/eprint/10965/1/Analysis%20of%20Compressed%20Natural%20Gas%20Burn%20Rate%20and%20Flame%20Propagation%20on%20a%20Sub-Compact%20Vehicle%20Engine.pdf D., Ramasamy and K., Kadirgama and M. M., Rahman and Z. A., Zainal (2015) Analysis of Compressed Natural Gas Burn Rate and Flame Propagation on a Sub-Compact Vehicle Engine. International Journal of Automotive and Mechanical Engineering (IJAME), 11. pp. 2405-2416. ISSN 1985-9325(Print); 2180-1606 (Online) http://dx.doi.org/10.15282/ijame.11.2015.21.0202 DOI: 10.15282/ijame.11.2015.21.0202
repository_type Digital Repository
institution_category Local University
institution Universiti Malaysia Pahang
building UMP Institutional Repository
collection Online Access
language English
topic TJ Mechanical engineering and machinery
spellingShingle TJ Mechanical engineering and machinery
D., Ramasamy
K., Kadirgama
M. M., Rahman
Z. A., Zainal
Analysis of Compressed Natural Gas Burn Rate and Flame Propagation on a Sub-Compact Vehicle Engine
description In terms of sub-compact cars using alternative fuels, the vehicle characteristics are governed by the engine operation. The main focus of this paper was to evaluate a subcompact car engine on its performance and burn rate of gasoline and compressed natural gas (CNG) . A bi-fuel sequential system was used for this evaluation. Measurements of engine speed, torque and fuel were done on an eddy current dynamometer, while measurements of in-cylinder pressure, crank angle and spark were analyzed from results taken by a data acquisition system. The emissions readings were also compared using an emission analyzer. The results were analyzed for burn rate based on the first law of thermodynamics. A 3-dimensional computational fluid dynamics (CFD) model was done to estimate the flame speed. The comparison shows an average drop of 18.6% for the power, 7% for brake specific fuel consumption (BSFC) and the efficiency loss was 17.3%. Pressure analysis shows peak pressure dropped by 16%. The burn rate shows why CNG had a slower burning speed on the small engine. CFD predicted the flame propagation speed at 8.45 m/s. The engine speed of 4000 rpm at maximum brake torque produced the results nearest to those for gasoline. In conclusion, volumetric losses and CFD errors slightly reduce the accuracy of the results, but nevertheless an 8.45 m/s flame speed was estimated.
format Article
author D., Ramasamy
K., Kadirgama
M. M., Rahman
Z. A., Zainal
author_facet D., Ramasamy
K., Kadirgama
M. M., Rahman
Z. A., Zainal
author_sort D., Ramasamy
title Analysis of Compressed Natural Gas Burn Rate and Flame Propagation on a Sub-Compact Vehicle Engine
title_short Analysis of Compressed Natural Gas Burn Rate and Flame Propagation on a Sub-Compact Vehicle Engine
title_full Analysis of Compressed Natural Gas Burn Rate and Flame Propagation on a Sub-Compact Vehicle Engine
title_fullStr Analysis of Compressed Natural Gas Burn Rate and Flame Propagation on a Sub-Compact Vehicle Engine
title_full_unstemmed Analysis of Compressed Natural Gas Burn Rate and Flame Propagation on a Sub-Compact Vehicle Engine
title_sort analysis of compressed natural gas burn rate and flame propagation on a sub-compact vehicle engine
publisher Universiti Malaysia Pahang
publishDate 2015
url http://umpir.ump.edu.my/id/eprint/10965/
http://umpir.ump.edu.my/id/eprint/10965/
http://umpir.ump.edu.my/id/eprint/10965/
http://umpir.ump.edu.my/id/eprint/10965/1/Analysis%20of%20Compressed%20Natural%20Gas%20Burn%20Rate%20and%20Flame%20Propagation%20on%20a%20Sub-Compact%20Vehicle%20Engine.pdf
first_indexed 2023-09-18T22:11:11Z
last_indexed 2023-09-18T22:11:11Z
_version_ 1777415038659723264

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