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Title: Spray–Wall Interactions in a Small-Bore, Multicylinder Engine Operating With Reactivity-Controlled Compression Ignition

Journal Article · · Journal of Engineering for Gas Turbines and Power
DOI:https://doi.org/10.1115/1.4039817· OSTI ID:1474583
 [1];  [1];  [2];  [2]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. Univ. of Wisconsin, Madison, WI (United States). Department of Mechanical Engineering
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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 study, 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. Finally, based on this evidence, explanations for the combustion phasing advance at early injection timings are proposed along with potential verification experiments.

Research Organization:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Sustainable Transportation Office. Bioenergy Technologies Office; USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1474583
Journal Information:
Journal of Engineering for Gas Turbines and Power, Vol. 140, Issue 9; ISSN 0742-4795
Publisher:
ASMECopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 5 works
Citation information provided by
Web of Science

References (16)

Effects of the direct-injected fuel’s physical and chemical properties on dual-fuel combustion journal November 2017
A comparison of Reactivity Controlled Compression Ignition (RCCI) and Gasoline Compression Ignition (GCI) strategies at high load, low speed conditions journal November 2016
The Effects of Charge Preparation, Fuel Stratification, and Premixed Fuel Chemistry on Reactivity Controlled Compression Ignition (RCCI) Combustion journal February 2017
Development of an n-heptane-n-butanol-PAH mechanism and its application for combustion and soot prediction journal March 2013
Effect of Premixed Fuel Preparation for Partially Premixed Combustion With a Low Octane Gasoline on a Light-Duty Multicylinder Compression Ignition Engine journal November 2015
An Analytical Jacobian Approach to Sparse Reaction Kinetics for Computationally Efficient Combustion Modeling with Large Reaction Mechanisms journal July 2012
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Blending the benefits of reactivity controlled compression ignition and gasoline compression ignition combustion using an adaptive fuel injection system journal July 2016
The Contribution of Lubricant to the Formation of Particulate Matter with Reactivity Controlled Compression Ignition in Light-Duty Diesel Engines journal December 2014
Fuel reactivity controlled compression ignition (RCCI): a pathway to controlled high-efficiency clean combustion journal June 2011
Impact of drops on solid surfaces: self-similar capillary waves, and splashing as a new type of kinematic discontinuity journal January 1995
Turbulence Modeling of Internal Combustion Engines Using RNG κ-ε Models journal January 1995
Second Generation GDCI Multi-Cylinder Engine for High Fuel Efficiency and US Tier 3 Emissions journal April 2016
Review of high efficiency and clean reactivity controlled compression ignition (RCCI) combustion in internal combustion engines journal February 2015
A perspective on the range of gasoline compression ignition combustion strategies for high engine efficiency and low NOx and soot emissions: Effects of in-cylinder fuel stratification journal July 2016
High Load (21 Bar IMEP) Dual Fuel RCCI Combustion Using Dual Direct Injection journal May 2014

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Related Subjects

42 ENGINEERING
Combustion
Fuels
Engines
Silicon-on-insulator
Computational fluid dynamics
Sprays
Compression
Ignition
Emissions
Cylinders