0
Research Papers: Fuel Combustion

Dilution Sensitivity of Particulate Matter Emissions From Reactivity-Controlled Compression Ignition Combustion

[+] Author and Article Information
Wei Fang

Department of Mechanical Engineering,
University of Minnesota,
111 Church Street SE,
Minneapolis, MN 55455
e-mail: fang0189@umn.edu

David B. Kittelson

Department of Mechanical Engineering,
University of Minnesota,
111 Church Street SE,
Minneapolis, MN 55455
e-mail: kitte001@umn.edu

William F. Northrop

Mem. ASME
Department of Mechanical Engineering,
University of Minnesota,
111 Church Street SE,
Minneapolis, MN 55455
e-mail: wnorthro@umn.edu

1Corresponding author.

Contributed by the Internal Combustion Engine Division of ASME for publication in the JOURNAL OF ENERGY RESOURCES TECHNOLOGY. Manuscript received July 27, 2016; final manuscript received January 10, 2017; published online February 8, 2017. Assoc. Editor: Stephen A. Ciatti.

J. Energy Resour. Technol 139(3), 032204 (Feb 08, 2017) (6 pages) Paper No: JERT-16-1311; doi: 10.1115/1.4035828 History: Received July 27, 2016; Revised January 10, 2017

Dual-fuel reactivity-controlled compression ignition (RCCI) combustion can yield high thermal efficiency and simultaneously low NOx and soot emissions. Although soot emissions from RCCI are very low, hydrocarbon (HC) emissions are high, potentially resulting in higher than desired total particulate matter (PM) mass and number caused by semivolatile species converting the particle phase upon primary dilution in the exhaust plume. Such high organic fraction PM is known to be highly sensitive to dilution conditions used when collecting samples on a filter or when measuring particle number using particle sizing instruments. In this study, PM emissions from a modified single-cylinder diesel engine operating in RCCI and conventional diesel combustion (CDC) modes were investigated under controlled dilution conditions. To investigate the effect of the fumigated fuel on the PM emissions, 150 proof hydrous ethanol and gasoline were used as low reactivity fuels. The data reveal that PM from RCCI combustion is more sensitive to the variation of dilution conditions than PM from single fuel conventional diesel combustion. RCCI PM primarily consisted of semivolatile organic compounds and a smaller amount of solid carbonaceous particles. The fumigated fuel had a significant effect on PM emissions' characteristics for RCCI combustion. Hydrous ethanol fueled RCCI PM contained a larger fraction of volatile materials and was more sensitive to the variation of dilution conditions compared to the gasoline fueled RCCI mode.

FIGURES IN THIS ARTICLE
<>
Copyright © 2017 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Fig. 1

Schematic of experimental system

Grahic Jump Location
Fig. 2

Total PM number concentrations indicating percent solid carbon as determined by pre- and post-CS measurements

Grahic Jump Location
Fig. 3

Total PM volume concentrations indicating percent solid carbon as determined by pre- and post-CS measurements

Grahic Jump Location
Fig. 4

PM size distribution curves for the LDT&LDR conditions

Grahic Jump Location
Fig. 5

PM size distribution curves for the LDT&HDR conditions

Grahic Jump Location
Fig. 6

PM size distribution curves for the HDT&LDR conditions

Grahic Jump Location
Fig. 7

PM size distribution curves for the HDT&HDR conditions

Grahic Jump Location
Fig. 8

In-cylinder pressure and RoHR traces

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In