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    Characterizing Two-Stage Combustion Process in a Natural Gas Spark Ignition Engine Based on Multi-Wiebe Function Model

    Source: Journal of Energy Resources Technology:;2020:;volume( 142 ):;issue: 010
    Author:
    Liu, Jinlong
    ,
    Ulishney, Chris
    ,
    Dumitrescu, Cosmin Emil
    DOI: 10.1115/1.4046793
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: The Wiebe function is a simple and cost-effective analytical approach to approximate the burn rates in internal combustion (IC) engines. Previous studies indicated that a double-Wiebe function model can better describe the two-stage combustion process inside diesel engines retrofitted to natural gas (NG) spark ignition (SI) compared with a single-Wiebe function. Specifically, the two Wiebe functions are associated with the bowl burn and the squish burn. However, the long tail in the energy release at the end of combustion produces some differences between experiment and model, which can be attributed to the complexity of the late oxidation process inside the post-flame zone and the incomplete combustion of the unburned mixture flowing out from engine crevices. To improve the matching between the model and experimental data, this paper investigated the effect of adding a third Wiebe function just to describe the long tail in the energy release at the end of combustion. The results indicated that such a methodology greatly improved the fitting accuracy in terms of phasing and magnitude of the heat release rate in each combustion stage.
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      Characterizing Two-Stage Combustion Process in a Natural Gas Spark Ignition Engine Based on Multi-Wiebe Function Model

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4273566
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    contributor authorLiu, Jinlong
    contributor authorUlishney, Chris
    contributor authorDumitrescu, Cosmin Emil
    date accessioned2022-02-04T14:23:32Z
    date available2022-02-04T14:23:32Z
    date copyright2020/05/05/
    date issued2020
    identifier issn0195-0738
    identifier otherjert_142_10_102302.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4273566
    description abstractThe Wiebe function is a simple and cost-effective analytical approach to approximate the burn rates in internal combustion (IC) engines. Previous studies indicated that a double-Wiebe function model can better describe the two-stage combustion process inside diesel engines retrofitted to natural gas (NG) spark ignition (SI) compared with a single-Wiebe function. Specifically, the two Wiebe functions are associated with the bowl burn and the squish burn. However, the long tail in the energy release at the end of combustion produces some differences between experiment and model, which can be attributed to the complexity of the late oxidation process inside the post-flame zone and the incomplete combustion of the unburned mixture flowing out from engine crevices. To improve the matching between the model and experimental data, this paper investigated the effect of adding a third Wiebe function just to describe the long tail in the energy release at the end of combustion. The results indicated that such a methodology greatly improved the fitting accuracy in terms of phasing and magnitude of the heat release rate in each combustion stage.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleCharacterizing Two-Stage Combustion Process in a Natural Gas Spark Ignition Engine Based on Multi-Wiebe Function Model
    typeJournal Paper
    journal volume142
    journal issue10
    journal titleJournal of Energy Resources Technology
    identifier doi10.1115/1.4046793
    page102302
    treeJournal of Energy Resources Technology:;2020:;volume( 142 ):;issue: 010
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
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