Study on the influence mechanism of mixture stratification on GCI combustion and the compound injection strategy under high load operation

Abstract Gasoline compression ignition combustion has demonstrated the potential of getting high fuel efficiency. In this work, two engine models are established in the commercial software Converge 2.3 based on the experimental results of an optical engine and a modified metal engine. The effect mec...

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Autores principales:	Lipeng Zhang, Hu Wang, Xin Zhong, Xu Han, Mengyu Wang, Zunqing Zheng, Mingfa Yao
Formato:	article
Lenguaje:	EN
Publicado:	Wiley 2021
Materias:	combustion control strategy optimization gasoline compression ignition mixture stratification numerical simulation soot emission Technology T Science Q
Acceso en línea:	https://doaj.org/article/ce17ff0bc95449c09f717eaa8e6ee620
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spelling	oai:doaj.org-article:ce17ff0bc95449c09f717eaa8e6ee6202021-12-02T05:24:30ZStudy on the influence mechanism of mixture stratification on GCI combustion and the compound injection strategy under high load operation2050-050510.1002/ese3.997https://doaj.org/article/ce17ff0bc95449c09f717eaa8e6ee6202021-12-01T00:00:00Zhttps://doi.org/10.1002/ese3.997https://doaj.org/toc/2050-0505Abstract Gasoline compression ignition combustion has demonstrated the potential of getting high fuel efficiency. In this work, two engine models are established in the commercial software Converge 2.3 based on the experimental results of an optical engine and a modified metal engine. The effect mechanism of mixture stratification and the influence of compound control strategy on gasoline compression ignition (GCI) combustion and soot emissions under high load condition are investigated. Results show that synergistic effect of physics and chemistry is the dominant control mechanism of GCI combustion. Stronger mixture stratification can effectively reduce the maximum pressure rise rate (MPRR) and improve the indicated thermal efficiency (ITE) and emissions; applying high EGR will significantly reduce OH radical in the cylinder and subsequently weaken the soot oxidation process, resulting in high soot emission; under the premise of reasonable NOx emission and MPRR, the soot emission can be effectively reduced with a proper advanced main injection timing. The effect of temperature on the soot oxidation process is the primary mechanism for the ultimate soot emission at different main injection timings; properly increasing the interval between the pre‐ and main injection can reduce NOx and soot emissions under the premise of ensuring that the MPRR is within the upper limit. However, the effect is not significant because of the small proportion of preinjection fuel.Lipeng ZhangHu WangXin ZhongXu HanMengyu WangZunqing ZhengMingfa YaoWileyarticlecombustioncontrol strategy optimizationgasoline compression ignitionmixture stratificationnumerical simulationsoot emissionTechnologyTScienceQENEnergy Science & Engineering, Vol 9, Iss 12, Pp 2434-2448 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	combustion control strategy optimization gasoline compression ignition mixture stratification numerical simulation soot emission Technology T Science Q
spellingShingle	combustion control strategy optimization gasoline compression ignition mixture stratification numerical simulation soot emission Technology T Science Q Lipeng Zhang Hu Wang Xin Zhong Xu Han Mengyu Wang Zunqing Zheng Mingfa Yao Study on the influence mechanism of mixture stratification on GCI combustion and the compound injection strategy under high load operation
description	Abstract Gasoline compression ignition combustion has demonstrated the potential of getting high fuel efficiency. In this work, two engine models are established in the commercial software Converge 2.3 based on the experimental results of an optical engine and a modified metal engine. The effect mechanism of mixture stratification and the influence of compound control strategy on gasoline compression ignition (GCI) combustion and soot emissions under high load condition are investigated. Results show that synergistic effect of physics and chemistry is the dominant control mechanism of GCI combustion. Stronger mixture stratification can effectively reduce the maximum pressure rise rate (MPRR) and improve the indicated thermal efficiency (ITE) and emissions; applying high EGR will significantly reduce OH radical in the cylinder and subsequently weaken the soot oxidation process, resulting in high soot emission; under the premise of reasonable NOx emission and MPRR, the soot emission can be effectively reduced with a proper advanced main injection timing. The effect of temperature on the soot oxidation process is the primary mechanism for the ultimate soot emission at different main injection timings; properly increasing the interval between the pre‐ and main injection can reduce NOx and soot emissions under the premise of ensuring that the MPRR is within the upper limit. However, the effect is not significant because of the small proportion of preinjection fuel.
format	article
author	Lipeng Zhang Hu Wang Xin Zhong Xu Han Mengyu Wang Zunqing Zheng Mingfa Yao
author_facet	Lipeng Zhang Hu Wang Xin Zhong Xu Han Mengyu Wang Zunqing Zheng Mingfa Yao
author_sort	Lipeng Zhang
title	Study on the influence mechanism of mixture stratification on GCI combustion and the compound injection strategy under high load operation
title_short	Study on the influence mechanism of mixture stratification on GCI combustion and the compound injection strategy under high load operation
title_full	Study on the influence mechanism of mixture stratification on GCI combustion and the compound injection strategy under high load operation
title_fullStr	Study on the influence mechanism of mixture stratification on GCI combustion and the compound injection strategy under high load operation
title_full_unstemmed	Study on the influence mechanism of mixture stratification on GCI combustion and the compound injection strategy under high load operation
title_sort	study on the influence mechanism of mixture stratification on gci combustion and the compound injection strategy under high load operation
publisher	Wiley
publishDate	2021
url	https://doaj.org/article/ce17ff0bc95449c09f717eaa8e6ee620
work_keys_str_mv	AT lipengzhang studyontheinfluencemechanismofmixturestratificationongcicombustionandthecompoundinjectionstrategyunderhighloadoperation AT huwang studyontheinfluencemechanismofmixturestratificationongcicombustionandthecompoundinjectionstrategyunderhighloadoperation AT xinzhong studyontheinfluencemechanismofmixturestratificationongcicombustionandthecompoundinjectionstrategyunderhighloadoperation AT xuhan studyontheinfluencemechanismofmixturestratificationongcicombustionandthecompoundinjectionstrategyunderhighloadoperation AT mengyuwang studyontheinfluencemechanismofmixturestratificationongcicombustionandthecompoundinjectionstrategyunderhighloadoperation AT zunqingzheng studyontheinfluencemechanismofmixturestratificationongcicombustionandthecompoundinjectionstrategyunderhighloadoperation AT mingfayao studyontheinfluencemechanismofmixturestratificationongcicombustionandthecompoundinjectionstrategyunderhighloadoperation
_version_	1718400441249693696

Study on the influence mechanism of mixture stratification on GCI combustion and the compound injection strategy under high load operation

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