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

Abstract

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.

Authors:
 [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
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1494646
Grant/Contract Number:  
EE0003533
Resource Type:
Published Article
Journal Name:
International Journal of Engine Research
Additional Journal Information:
Journal Name: International Journal of Engine Research Journal Volume: 20 Journal Issue: 3; Journal ID: ISSN 1468-0874
Publisher:
SAGE Publications
Country of Publication:
United Kingdom
Language:
English

Citation Formats

Shingne, Prasad S., Middleton, Robert J., Borgnakke, Claus, and Martz, Jason B. The effects of boost pressure on stratification and burn duration of gasoline homogeneous charge compression ignition combustion. United Kingdom: N. p., 2018. Web. doi:10.1177/1468087417754177.
Shingne, Prasad S., Middleton, Robert J., Borgnakke, Claus, & Martz, Jason B. The effects of boost pressure on stratification and burn duration of gasoline homogeneous charge compression ignition combustion. United Kingdom. doi:10.1177/1468087417754177.
Shingne, Prasad S., Middleton, Robert J., Borgnakke, Claus, and Martz, Jason B. Fri . "The effects of boost pressure on stratification and burn duration of gasoline homogeneous charge compression ignition combustion". United Kingdom. doi:10.1177/1468087417754177.
@article{osti_1494646,
title = {The effects of boost pressure on stratification and burn duration of gasoline homogeneous charge compression ignition combustion},
author = {Shingne, Prasad S. and Middleton, Robert J. and Borgnakke, Claus and Martz, Jason B.},
abstractNote = {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.},
doi = {10.1177/1468087417754177},
journal = {International Journal of Engine Research},
number = 3,
volume = 20,
place = {United Kingdom},
year = {2018},
month = {2}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1177/1468087417754177

Citation Metrics:
Cited by: 3 works
Citation information provided by
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