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

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

doi:10.1115/1.4039817

Spray-wall interactions in a small-bore, multicylinder 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: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

Experimental work on reactivity-controlled compression ignition (RCCI) in a small-bore, multicylinder 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 (deg CA) after top dead center (aTDC), and transition from partial to full impingement between -65 and -90 deg 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
Article number	092808
Journal	Journal of Engineering for Gas Turbines and Power
Volume	140
Issue number	9
DOIs	https://doi.org/10.1115/1.4039817
State	Published - Sep 1 2018

Funding

This material is based on the work supported by the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, Vehicle Technologies Office via the Advanced Combustion Engine Systems program. Notice: This manuscript has been authored by UT-Battelle, LLC, under contract DE-AC05-00OR22725 with the U.S. Department of Energy (DOE). The U.S. government retains and the publisher, by accepting the article for publication, acknowledges that the U.S. 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 U.S. government purposes. DOE 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.

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

Access to Document

10.1115/1.4039817

Cite this

@article{7c793b5fc2644f8db742864951d3537a,

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

abstract = "Experimental work on reactivity-controlled compression ignition (RCCI) in a small-bore, multicylinder 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 (deg CA) after top dead center (aTDC), and transition from partial to full impingement between -65 and -90 deg 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.}",

note = "Publisher Copyright: Copyright {\textcopyright} 2018 by ASME.",

year = "2018",

month = sep,

day = "1",

doi = "10.1115/1.4039817",

language = "English",

volume = "140",

journal = "Journal of Engineering for Gas Turbines and Power",

issn = "0742-4795",

publisher = "American Society of Mechanical Engineers",

number = "9",

}

TY - JOUR

T1 - Spray-wall interactions in a small-bore, multicylinder engine operating with reactivity-controlled compression ignition

AU - Wissink, Martin L.

AU - Curran, Scott J.

AU - Kavuri, Chaitanya

AU - Kokjohn, Sage L.

PY - 2018/9/1

Y1 - 2018/9/1

N2 - Experimental work on reactivity-controlled compression ignition (RCCI) in a small-bore, multicylinder 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 (deg CA) after top dead center (aTDC), and transition from partial to full impingement between -65 and -90 deg 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, multicylinder 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 (deg CA) after top dead center (aTDC), and transition from partial to full impingement between -65 and -90 deg CA aTDC. Based on this evidence, explanations for the combustion phasing advance at early injection timings are proposed along with potential verification experiments.

UR - http://www.scopus.com/inward/record.url?scp=85051371334&partnerID=8YFLogxK

U2 - 10.1115/1.4039817

DO - 10.1115/1.4039817

M3 - Article

AN - SCOPUS:85051371334

SN - 0742-4795

VL - 140

JO - Journal of Engineering for Gas Turbines and Power

JF - Journal of Engineering for Gas Turbines and Power

IS - 9

M1 - 092808

ER -

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

Abstract

Funding

Access to Document

Other files and links

Fingerprint

Cite this