Investigation of soot particles in compression ignition diesel engine by CFD simulation using different level of complexity of soot models

Research output: Contribution to conferencePaper

1 Citation (Scopus)

Abstract

The undisputable advantages in terms of time and cost saving for soot emission study have made the computational analyses become more preferable. Current development of computer programs with higher precision of mathematical models brings simulation works closer to the real engine combustion environment. The objective of this study was to investigate the soot particles formation using different level of complexity of soot models available. This investigation of in-cylinder soot concentration has been carried out using relatively recent commercial Computational Fluid Dynamic (CFD) software, CONVERGE CFD. In conjunction with exploring its full capabilities, studies on in-cylinder soot formation has been performed using a detailed soot model of Methods of Moment and its results were compared with that of a simple two-step soot model of Hiroyasu-NSC model. The combustion process of a 493 cc, single-cylinder direct injection diesel engine was simulated for a close-cycle combustion environment which is from inlet valve closing (IVC) to exhaust valve opening (EVO). Results show that simpler soot model gives higher soot mass peak value while detailed soot model with lower soot mass value provides extra information of soot size, number density, volume fraction and soot mass for every related soot formation process. An important limitation of the current study is that it was all conducted only by simulation process without any validation by experimental work, and the maximum number of cells generated was set to 500,000 for the computational analyses purposes. The analysis and comparison of soot particles using different level of complexity of soot models in this paper specifically performed by this particular software is considered new and have not been reported before. Overall, CONVERGE-CFD software is an attractive computational tool to study various soot models as it has the ability to analyze soot formation process using detailed as well as simpler soot models.

Original languageEnglish
Publication statusPublished - 1 Jan 2016
Event36th FISITA World Automotive Congress, 2016 - Busan, Korea, Republic of
Duration: 26 Sep 201630 Sep 2016

Other

Other36th FISITA World Automotive Congress, 2016
CountryKorea, Republic of
CityBusan
Period26/9/1630/9/16

Fingerprint

Soot
Ignition
Diesel engines
Computational fluid dynamics
Computer simulation
Engine cylinders
Direct injection
Method of moments

Keywords

  • Exhaust emission
  • Hiroyasu-NSC
  • Methods of moment
  • Particulate Mimic model
  • Soot

ASJC Scopus subject areas

  • Automotive Engineering
  • Safety, Risk, Reliability and Quality

Cite this

Investigation of soot particles in compression ignition diesel engine by CFD simulation using different level of complexity of soot models. / Ibrahim, Fadzli; Wan Mahmood, Wan Mohd Faizal; Abdullah, Shahrir; Abu Mansor, Mohd Radzi.

2016. Paper presented at 36th FISITA World Automotive Congress, 2016, Busan, Korea, Republic of.

Research output: Contribution to conferencePaper

Ibrahim, F, Wan Mahmood, WMF, Abdullah, S & Abu Mansor, MR 2016, 'Investigation of soot particles in compression ignition diesel engine by CFD simulation using different level of complexity of soot models' Paper presented at 36th FISITA World Automotive Congress, 2016, Busan, Korea, Republic of, 26/9/16 - 30/9/16, .
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abstract = "The undisputable advantages in terms of time and cost saving for soot emission study have made the computational analyses become more preferable. Current development of computer programs with higher precision of mathematical models brings simulation works closer to the real engine combustion environment. The objective of this study was to investigate the soot particles formation using different level of complexity of soot models available. This investigation of in-cylinder soot concentration has been carried out using relatively recent commercial Computational Fluid Dynamic (CFD) software, CONVERGE CFD. In conjunction with exploring its full capabilities, studies on in-cylinder soot formation has been performed using a detailed soot model of Methods of Moment and its results were compared with that of a simple two-step soot model of Hiroyasu-NSC model. The combustion process of a 493 cc, single-cylinder direct injection diesel engine was simulated for a close-cycle combustion environment which is from inlet valve closing (IVC) to exhaust valve opening (EVO). Results show that simpler soot model gives higher soot mass peak value while detailed soot model with lower soot mass value provides extra information of soot size, number density, volume fraction and soot mass for every related soot formation process. An important limitation of the current study is that it was all conducted only by simulation process without any validation by experimental work, and the maximum number of cells generated was set to 500,000 for the computational analyses purposes. The analysis and comparison of soot particles using different level of complexity of soot models in this paper specifically performed by this particular software is considered new and have not been reported before. Overall, CONVERGE-CFD software is an attractive computational tool to study various soot models as it has the ability to analyze soot formation process using detailed as well as simpler soot models.",
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