In-cylinder soot particle distribution in squish region of a direct injection diesel engine

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5 Citations (Scopus)

Abstract

The size and distribution of in-cylinder soot particles affect the sizes of soot particles emitted from exhaust tailpipes as well as the soot in oil. The simulation work reported in this paper focuses on the study of soot formation and movement inside a diesel engine with in-depth analysis of soot particles in the squish region. Soot particles in the squish region have high potential to be deposited onto the cylinder wall, and subsequently penetrate into engine lubrication system and contaminate the oil. The prediction of a soot particle pathline and size distribution was performed using post-processed in-cylinder combustion data from Kiva-3v computational fluid dynamics (CFD) simulations with a series of Matlab routines. Only soot oxidation and soot surface growth process were considered in this study. Coagulation and agglomeration of soot particles were not taken into account. Soot particles were tracked from 8 crank angle (CA) degree after top dead center (ATDC) as soot starts to form in high concentration until 120 CA degree ATDC at exhaust valve opening (EVO). The soot particle size and its distribution were analyzed at different crank angles. In the squish region, the most dominant soot particle size was 20-50 nm at earlier crank angle and in 10-20 nm range at 120 CA ATDC. The percentage of soot loss in the squish region was analyzed to be 23.2 % and the soot loss was higher at earlier crank angle until 10 CA degree ATDC due to high rate of oxidation.

Original languageEnglish
Pages (from-to)51-58
Number of pages8
JournalInternational Journal of Mechanical and Mechatronics Engineering
Volume14
Issue number5
Publication statusPublished - 2014

Fingerprint

Direct injection
Engine cylinders
Soot
Diesel engines
Particle size
Oxidation
Coagulation
Lubrication

Keywords

  • In-cylinder soot size
  • Particle tracking
  • Soot
  • Squish region

ASJC Scopus subject areas

  • Engineering(all)

Cite this

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title = "In-cylinder soot particle distribution in squish region of a direct injection diesel engine",
abstract = "The size and distribution of in-cylinder soot particles affect the sizes of soot particles emitted from exhaust tailpipes as well as the soot in oil. The simulation work reported in this paper focuses on the study of soot formation and movement inside a diesel engine with in-depth analysis of soot particles in the squish region. Soot particles in the squish region have high potential to be deposited onto the cylinder wall, and subsequently penetrate into engine lubrication system and contaminate the oil. The prediction of a soot particle pathline and size distribution was performed using post-processed in-cylinder combustion data from Kiva-3v computational fluid dynamics (CFD) simulations with a series of Matlab routines. Only soot oxidation and soot surface growth process were considered in this study. Coagulation and agglomeration of soot particles were not taken into account. Soot particles were tracked from 8 crank angle (CA) degree after top dead center (ATDC) as soot starts to form in high concentration until 120 CA degree ATDC at exhaust valve opening (EVO). The soot particle size and its distribution were analyzed at different crank angles. In the squish region, the most dominant soot particle size was 20-50 nm at earlier crank angle and in 10-20 nm range at 120 CA ATDC. The percentage of soot loss in the squish region was analyzed to be 23.2 {\%} and the soot loss was higher at earlier crank angle until 10 CA degree ATDC due to high rate of oxidation.",
keywords = "In-cylinder soot size, Particle tracking, Soot, Squish region",
author = "Zuber, {Muhammad A.} and {Wan Mahmood}, {Wan Mohd Faizal} and {Zainol Abidin}, Zulkhairi and Zambri Harun",
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T1 - In-cylinder soot particle distribution in squish region of a direct injection diesel engine

AU - Zuber, Muhammad A.

AU - Wan Mahmood, Wan Mohd Faizal

AU - Zainol Abidin, Zulkhairi

AU - Harun, Zambri

PY - 2014

Y1 - 2014

N2 - The size and distribution of in-cylinder soot particles affect the sizes of soot particles emitted from exhaust tailpipes as well as the soot in oil. The simulation work reported in this paper focuses on the study of soot formation and movement inside a diesel engine with in-depth analysis of soot particles in the squish region. Soot particles in the squish region have high potential to be deposited onto the cylinder wall, and subsequently penetrate into engine lubrication system and contaminate the oil. The prediction of a soot particle pathline and size distribution was performed using post-processed in-cylinder combustion data from Kiva-3v computational fluid dynamics (CFD) simulations with a series of Matlab routines. Only soot oxidation and soot surface growth process were considered in this study. Coagulation and agglomeration of soot particles were not taken into account. Soot particles were tracked from 8 crank angle (CA) degree after top dead center (ATDC) as soot starts to form in high concentration until 120 CA degree ATDC at exhaust valve opening (EVO). The soot particle size and its distribution were analyzed at different crank angles. In the squish region, the most dominant soot particle size was 20-50 nm at earlier crank angle and in 10-20 nm range at 120 CA ATDC. The percentage of soot loss in the squish region was analyzed to be 23.2 % and the soot loss was higher at earlier crank angle until 10 CA degree ATDC due to high rate of oxidation.

AB - The size and distribution of in-cylinder soot particles affect the sizes of soot particles emitted from exhaust tailpipes as well as the soot in oil. The simulation work reported in this paper focuses on the study of soot formation and movement inside a diesel engine with in-depth analysis of soot particles in the squish region. Soot particles in the squish region have high potential to be deposited onto the cylinder wall, and subsequently penetrate into engine lubrication system and contaminate the oil. The prediction of a soot particle pathline and size distribution was performed using post-processed in-cylinder combustion data from Kiva-3v computational fluid dynamics (CFD) simulations with a series of Matlab routines. Only soot oxidation and soot surface growth process were considered in this study. Coagulation and agglomeration of soot particles were not taken into account. Soot particles were tracked from 8 crank angle (CA) degree after top dead center (ATDC) as soot starts to form in high concentration until 120 CA degree ATDC at exhaust valve opening (EVO). The soot particle size and its distribution were analyzed at different crank angles. In the squish region, the most dominant soot particle size was 20-50 nm at earlier crank angle and in 10-20 nm range at 120 CA ATDC. The percentage of soot loss in the squish region was analyzed to be 23.2 % and the soot loss was higher at earlier crank angle until 10 CA degree ATDC due to high rate of oxidation.

KW - In-cylinder soot size

KW - Particle tracking

KW - Soot

KW - Squish region

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