Spray-wall interactions in a small-bore, multi-cylinder engine operating with reactivity-controlled compression ignition

Martin L. Wissink; Scott J. Curran; Chaitanya Kavuri; Sage L. Kokjohn

doi:10.1115/ICEF2017-3607

Spray-wall interactions in a small-bore, multi-cylinder engine operating with reactivity-controlled compression ignition

Martin L. Wissink, Scott J. Curran, Chaitanya Kavuri, Sage L. Kokjohn

Fuel Science & Engine Technologies Resea

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

2 Scopus citations

Abstract

Experimental work on reactivity-controlled compression ignition (RCCI) in a small-bore, multi-cylinder engine operating on premixed iso-octane and direct-injected n-heptane has shown an unexpected combustion phasing advance at early injection timings, which has not been observed in large-bore engines operating under RCCI at similar conditions. In this work, computational fluid dynamics (CFD) simulations were performed to investigate whether spray-wall interactions could be responsible for this result. Comparison of the spray penetration, fuel film mass, and in-cylinder visualization of the spray from the CFD results to the experimentally measured combustion phasing and emissions provided compelling evidence of strong fuel impingement at injection timings earlier than -90 crank angle degrees (°CA) after top dead center (aTDC), and transition from partial to full impingement between -65 and -90°CA aTDC. Based on this evidence, explanations for the combustion phasing advance at early injection timings are proposed along with potential verification experiments.

Original language	English
Title of host publication	Large Bore Engines; Fuels; Advanced Combustion
Publisher	American Society of Mechanical Engineers
ISBN (Electronic)	9780791858318
DOIs	https://doi.org/10.1115/ICEF2017-3607
State	Published - 2017
Event	ASME 2017 Internal Combustion Engine Division Fall Technical Conference, ICEF 2017 - Seattle, United States Duration: Oct 15 2017 → Oct 18 2017

Publication series

Name	ASME 2017 Internal Combustion Engine Division Fall Technical Conference, ICEF 2017
Volume	1

Conference

Conference	ASME 2017 Internal Combustion Engine Division Fall Technical Conference, ICEF 2017
Country/Territory	United States
City	Seattle
Period	10/15/17 → 10/18/17

Funding

This manuscript has been authored by UT-Battelle, LLC under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States Government purposes. The Department of Energy will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan (http://energy.gov/downloads/doe-public-access-plan). This research was conducted as part of the Co-Optimization of Fuels & Engines (Co-Optima) project sponsored by the U.S. Department of Energy (DOE) Office of Energy Efficiency and Renewable Energy (EERE), Bioenergy Technologies and Vehicle Technologies Offices. Co-Optima is a collaborative project of multiple national laboratories initiated to simultaneously accelerate the introduction of affordable, scalable, and sustainable biofuels and high-efficiency, low-emission vehicle engines.

Funders	Funder number
Co-Optimization of Fuels & Engines
US Department of Energy
U.S. Department of Energy
Office of Energy Efficiency and Renewable Energy

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10.1115/ICEF2017-3607

Cite this

Wissink, M. L., Curran, S. J., Kavuri, C., & Kokjohn, S. L. (2017). Spray-wall interactions in a small-bore, multi-cylinder engine operating with reactivity-controlled compression ignition. In Large Bore Engines; Fuels; Advanced Combustion (ASME 2017 Internal Combustion Engine Division Fall Technical Conference, ICEF 2017; Vol. 1). American Society of Mechanical Engineers. https://doi.org/10.1115/ICEF2017-3607

Wissink, Martin L. ; Curran, Scott J. ; Kavuri, Chaitanya et al. / Spray-wall interactions in a small-bore, multi-cylinder engine operating with reactivity-controlled compression ignition. Large Bore Engines; Fuels; Advanced Combustion. American Society of Mechanical Engineers, 2017. (ASME 2017 Internal Combustion Engine Division Fall Technical Conference, ICEF 2017).

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title = "Spray-wall interactions in a small-bore, multi-cylinder engine operating with reactivity-controlled compression ignition",

abstract = "Experimental work on reactivity-controlled compression ignition (RCCI) in a small-bore, multi-cylinder engine operating on premixed iso-octane and direct-injected n-heptane has shown an unexpected combustion phasing advance at early injection timings, which has not been observed in large-bore engines operating under RCCI at similar conditions. In this work, computational fluid dynamics (CFD) simulations were performed to investigate whether spray-wall interactions could be responsible for this result. Comparison of the spray penetration, fuel film mass, and in-cylinder visualization of the spray from the CFD results to the experimentally measured combustion phasing and emissions provided compelling evidence of strong fuel impingement at injection timings earlier than -90 crank angle degrees (°CA) after top dead center (aTDC), and transition from partial to full impingement between -65 and -90°CA aTDC. Based on this evidence, explanations for the combustion phasing advance at early injection timings are proposed along with potential verification experiments.",

author = "Wissink, {Martin L.} and Curran, {Scott J.} and Chaitanya Kavuri and Kokjohn, {Sage L.}",

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year = "2017",

doi = "10.1115/ICEF2017-3607",

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Wissink, ML, Curran, SJ, Kavuri, C & Kokjohn, SL 2017, Spray-wall interactions in a small-bore, multi-cylinder engine operating with reactivity-controlled compression ignition. in Large Bore Engines; Fuels; Advanced Combustion. ASME 2017 Internal Combustion Engine Division Fall Technical Conference, ICEF 2017, vol. 1, American Society of Mechanical Engineers, ASME 2017 Internal Combustion Engine Division Fall Technical Conference, ICEF 2017, Seattle, United States, 10/15/17. https://doi.org/10.1115/ICEF2017-3607

Spray-wall interactions in a small-bore, multi-cylinder engine operating with reactivity-controlled compression ignition. / Wissink, Martin L.; Curran, Scott J.; Kavuri, Chaitanya et al.
Large Bore Engines; Fuels; Advanced Combustion. American Society of Mechanical Engineers, 2017. (ASME 2017 Internal Combustion Engine Division Fall Technical Conference, ICEF 2017; Vol. 1).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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AU - Curran, Scott J.

AU - Kavuri, Chaitanya

AU - Kokjohn, Sage L.

PY - 2017

Y1 - 2017

N2 - Experimental work on reactivity-controlled compression ignition (RCCI) in a small-bore, multi-cylinder engine operating on premixed iso-octane and direct-injected n-heptane has shown an unexpected combustion phasing advance at early injection timings, which has not been observed in large-bore engines operating under RCCI at similar conditions. In this work, computational fluid dynamics (CFD) simulations were performed to investigate whether spray-wall interactions could be responsible for this result. Comparison of the spray penetration, fuel film mass, and in-cylinder visualization of the spray from the CFD results to the experimentally measured combustion phasing and emissions provided compelling evidence of strong fuel impingement at injection timings earlier than -90 crank angle degrees (°CA) after top dead center (aTDC), and transition from partial to full impingement between -65 and -90°CA aTDC. Based on this evidence, explanations for the combustion phasing advance at early injection timings are proposed along with potential verification experiments.

AB - Experimental work on reactivity-controlled compression ignition (RCCI) in a small-bore, multi-cylinder engine operating on premixed iso-octane and direct-injected n-heptane has shown an unexpected combustion phasing advance at early injection timings, which has not been observed in large-bore engines operating under RCCI at similar conditions. In this work, computational fluid dynamics (CFD) simulations were performed to investigate whether spray-wall interactions could be responsible for this result. Comparison of the spray penetration, fuel film mass, and in-cylinder visualization of the spray from the CFD results to the experimentally measured combustion phasing and emissions provided compelling evidence of strong fuel impingement at injection timings earlier than -90 crank angle degrees (°CA) after top dead center (aTDC), and transition from partial to full impingement between -65 and -90°CA aTDC. Based on this evidence, explanations for the combustion phasing advance at early injection timings are proposed along with potential verification experiments.

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Wissink ML, Curran SJ, Kavuri C, Kokjohn SL. Spray-wall interactions in a small-bore, multi-cylinder engine operating with reactivity-controlled compression ignition. In Large Bore Engines; Fuels; Advanced Combustion. American Society of Mechanical Engineers. 2017. (ASME 2017 Internal Combustion Engine Division Fall Technical Conference, ICEF 2017). doi: 10.1115/ICEF2017-3607

Spray-wall interactions in a small-bore, multi-cylinder engine operating with reactivity-controlled compression ignition

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