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Title: The effects of boost pressure on stratification and burn duration of gasoline homogeneous charge compression ignition combustion

Journal Article · · International Journal of Engine Research
 [1];  [2];  [2];  [2]
  1. Walter E. Lay Automotive Laboratory, The University of Michigan, Ann Arbor, MI, USA, Ford Research and Innovation Center, Dearborn, MI, USA
  2. Walter E. Lay Automotive Laboratory, The University of Michigan, Ann Arbor, MI, USA
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This article investigates the effects of intake pressure (boost) on the pre-ignition stratification and burn duration of homogeneous charge compression ignition combustion. Full cycle computational fluid dynamics simulations are performed with gasoline kinetics. An intake pressure sweep is performed while maintaining the same combustion timing and mean composition. The burn duration reduces with increasing boost, even though intake temperature is reduced to hold combustion timing constant. It is shown that the compositional stratification increases with boost whereas thermal stratification decreases. A quasi-dimensional model is employed to assess the effect of compositional stratification, pressure, mean temperature and isolate the effect of thermal stratification on burn duration. The analysis reveals that reducing charge temperature neutralizes the effect of increased boost on reactivity and the shorter burn durations at higher boost are primarily due to the lower thermal stratification. It is shown that higher pressures do not significantly increase the mixing and the lower thermal stratification is due to lower wall heat losses per unit charge mass. A follow-up set of non-reacting simulations with adiabatic walls corroborate this claim by revealing a constant magnitude of thermal stratification across the boost sweep.

Sponsoring Organization:
USDOE
Grant/Contract Number:
EE0003533
OSTI ID:
1494646
Journal Information:
International Journal of Engine Research, Journal Name: International Journal of Engine Research Vol. 20 Journal Issue: 3; ISSN 1468-0874
Publisher:
SAGE PublicationsCopyright Statement
Country of Publication:
United Kingdom
Language:
English
Citation Metrics:
Cited by: 5 works
Citation information provided by
Web of Science

References (19)

The effects of spark timing, unburned gas temperature, and negative valve overlap on the rates of stoichiometric spark assisted compression ignition combustion journal May 2013
The effects of thermal and compositional stratification on the ignition and duration of homogeneous charge compression ignition combustion journal February 2015
An accelerated multi-zone model for engine cycle simulation of homogeneous charge compression ignition combustion journal June 2013
Kinetic modeling of gasoline surrogate components and mixtures under engine conditions journal January 2011
An experimental study of negative valve overlap injection effects and their impact on combustion in a gasoline HCCI engine journal January 2014
Characterizing the Development of Thermal Stratification in an HCCI Engine Using Planar-Imaging Thermometry journal April 2009
Reaction-space analysis of homogeneous charge compression ignition combustion with varying levels of fuel stratification under positive and negative valve overlap conditions journal July 2016
Understanding the Dynamic Evolution of Cyclic Variability at the Operating Limits of HCCI Engines with Negative Valve Overlap journal January 2012
Residual-effected homogeneous charge compression ignition with delayed intake-valve closing at elevated compression ratio journal August 2005
An Approach for Formulating Surrogates for Gasoline with Application toward a Reduced Surrogate Mechanism for CFD Engine Modeling journal November 2011
Simultaneous imaging of exhaust gas residuals and temperature during HCCI combustion journal January 2009
Computational Fluid Dynamics Simulation of Gasoline Compression Ignition journal May 2015
A thermodynamic model for homogeneous charge compression ignition combustion with recompression valve events and direct injection: Part I — Adiabatic core ignition model journal November 2016
A chemical kinetically based ignition delay correlation for iso-octane covering a wide range of conditions including the NTC region journal June 2009
Development of a new multi zone model for prediction of HCCI (homogenous charge compression ignition) engine combustion, performance and emission characteristics journal August 2014
A Thermodynamic Study on Boosted HCCI: Motivation, Analysis and Potential journal April 2010
Comparison of Different Boosting Strategies for Homogeneous Charge Compression Ignition Engines - A Modeling Study journal April 2010
Boosted HCCI for High Power without Engine Knock and with Ultra-Low NOx Emissions - using Conventional Gasoline journal April 2010
An experimental and modeling study of iso-octane ignition delay times under homogeneous charge compression ignition conditions journal August 2005

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