Correlation of nanoparticle size distribution features to spatiotemporal flame luminosity in gasoline direct injection engines

Joonho Jeon, Noah R Bock, David B Kittelson, William Northrop

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Particle size distribution measured by mobility instruments is a common diagnostic used to characterize ultrafine and nanoparticle emissions in engine exhaust; however, some features of particle size distribution data are poorly correlated to in-cylinder combustion phenomena. In this work, in-cylinder spatiotemporal flame luminosity is quantitatively correlated to features in the solid particle size distribution measured in the exhaust of a gasoline direct injection engine operating in lean and stoichiometric combustion modes. A multi-channel optical sensor was used to measure diffusion flame light intensity in different areas of the combustion chamber. Total solid particle number and particle size distribution in the exhaust were measured using a scanning mobility particle sizer after a catalytic stripper that removed semi-volatile compounds. Results of the experiments showed that different flame phenomenon resulted in distinct particle size distribution characteristics. A large accumulation mode (particles with diameter of 50–100 nm) in the particle size distribution from stoichiometric engine operation with early injection resulted from anomalous diffusion flames like piston-top pool fires. In lean operation incorporating a secondary fuel injection, particle emissions were dominated by flame propagation through fuel-rich regions of the combustion chamber resulting in a comparatively broad particle size distribution. More generally, this work illustrates how particle size distribution data can be more accurately used to diagnose soot formation in gasoline direct injection engines.

Original languageEnglish (US)
JournalInternational Journal of Engine Research
DOIs
StateAccepted/In press - Jan 1 2018

Fingerprint

Direct injection
Particle size analysis
Gasoline
Luminance
Nanoparticles
Engines
Engine cylinders
Combustion chambers
Particles (particulate matter)
Exhaust systems (engine)
Fuel injection
Optical sensors
Soot
Pistons
Fires
Scanning

Keywords

  • Gasoline direct injection engines
  • flame light intensity
  • lean combustion
  • particle size distribution
  • soot formation

Cite this

@article{1d1bb5822b1a49b7a6246aa90106d87f,
title = "Correlation of nanoparticle size distribution features to spatiotemporal flame luminosity in gasoline direct injection engines",
abstract = "Particle size distribution measured by mobility instruments is a common diagnostic used to characterize ultrafine and nanoparticle emissions in engine exhaust; however, some features of particle size distribution data are poorly correlated to in-cylinder combustion phenomena. In this work, in-cylinder spatiotemporal flame luminosity is quantitatively correlated to features in the solid particle size distribution measured in the exhaust of a gasoline direct injection engine operating in lean and stoichiometric combustion modes. A multi-channel optical sensor was used to measure diffusion flame light intensity in different areas of the combustion chamber. Total solid particle number and particle size distribution in the exhaust were measured using a scanning mobility particle sizer after a catalytic stripper that removed semi-volatile compounds. Results of the experiments showed that different flame phenomenon resulted in distinct particle size distribution characteristics. A large accumulation mode (particles with diameter of 50–100 nm) in the particle size distribution from stoichiometric engine operation with early injection resulted from anomalous diffusion flames like piston-top pool fires. In lean operation incorporating a secondary fuel injection, particle emissions were dominated by flame propagation through fuel-rich regions of the combustion chamber resulting in a comparatively broad particle size distribution. More generally, this work illustrates how particle size distribution data can be more accurately used to diagnose soot formation in gasoline direct injection engines.",
keywords = "Gasoline direct injection engines, flame light intensity, lean combustion, particle size distribution, soot formation",
author = "Joonho Jeon and Bock, {Noah R} and Kittelson, {David B} and William Northrop",
year = "2018",
month = "1",
day = "1",
doi = "10.1177/1468087418798468",
language = "English (US)",
journal = "International Journal of Engine Research",
issn = "1468-0874",
publisher = "SAGE Publications Ltd",

}

TY - JOUR

T1 - Correlation of nanoparticle size distribution features to spatiotemporal flame luminosity in gasoline direct injection engines

AU - Jeon, Joonho

AU - Bock, Noah R

AU - Kittelson, David B

AU - Northrop, William

PY - 2018/1/1

Y1 - 2018/1/1

N2 - Particle size distribution measured by mobility instruments is a common diagnostic used to characterize ultrafine and nanoparticle emissions in engine exhaust; however, some features of particle size distribution data are poorly correlated to in-cylinder combustion phenomena. In this work, in-cylinder spatiotemporal flame luminosity is quantitatively correlated to features in the solid particle size distribution measured in the exhaust of a gasoline direct injection engine operating in lean and stoichiometric combustion modes. A multi-channel optical sensor was used to measure diffusion flame light intensity in different areas of the combustion chamber. Total solid particle number and particle size distribution in the exhaust were measured using a scanning mobility particle sizer after a catalytic stripper that removed semi-volatile compounds. Results of the experiments showed that different flame phenomenon resulted in distinct particle size distribution characteristics. A large accumulation mode (particles with diameter of 50–100 nm) in the particle size distribution from stoichiometric engine operation with early injection resulted from anomalous diffusion flames like piston-top pool fires. In lean operation incorporating a secondary fuel injection, particle emissions were dominated by flame propagation through fuel-rich regions of the combustion chamber resulting in a comparatively broad particle size distribution. More generally, this work illustrates how particle size distribution data can be more accurately used to diagnose soot formation in gasoline direct injection engines.

AB - Particle size distribution measured by mobility instruments is a common diagnostic used to characterize ultrafine and nanoparticle emissions in engine exhaust; however, some features of particle size distribution data are poorly correlated to in-cylinder combustion phenomena. In this work, in-cylinder spatiotemporal flame luminosity is quantitatively correlated to features in the solid particle size distribution measured in the exhaust of a gasoline direct injection engine operating in lean and stoichiometric combustion modes. A multi-channel optical sensor was used to measure diffusion flame light intensity in different areas of the combustion chamber. Total solid particle number and particle size distribution in the exhaust were measured using a scanning mobility particle sizer after a catalytic stripper that removed semi-volatile compounds. Results of the experiments showed that different flame phenomenon resulted in distinct particle size distribution characteristics. A large accumulation mode (particles with diameter of 50–100 nm) in the particle size distribution from stoichiometric engine operation with early injection resulted from anomalous diffusion flames like piston-top pool fires. In lean operation incorporating a secondary fuel injection, particle emissions were dominated by flame propagation through fuel-rich regions of the combustion chamber resulting in a comparatively broad particle size distribution. More generally, this work illustrates how particle size distribution data can be more accurately used to diagnose soot formation in gasoline direct injection engines.

KW - Gasoline direct injection engines

KW - flame light intensity

KW - lean combustion

KW - particle size distribution

KW - soot formation

UR - http://www.scopus.com/inward/record.url?scp=85060057643&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85060057643&partnerID=8YFLogxK

U2 - 10.1177/1468087418798468

DO - 10.1177/1468087418798468

M3 - Article

AN - SCOPUS:85060057643

JO - International Journal of Engine Research

JF - International Journal of Engine Research

SN - 1468-0874

ER -