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首页> 外文期刊>Fuel >A numerical study on the effects of boot injection rate-shapes on the combustion and emissions of a kerosene-diesel fueled direct injection compression ignition engine
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A numerical study on the effects of boot injection rate-shapes on the combustion and emissions of a kerosene-diesel fueled direct injection compression ignition engine

机译：尾气喷射率形状对煤油柴油直喷压缩点火发动机燃烧和排放影响的数值研究

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摘要

In this work, the effects of boot injection rate-shapes on the combustion process and emissions formation of a direct injection compression ignition engine fueled with kerosene and diesel are investigated through numerical simulations. Boot injection rate-shapes with varying boot injection velocity and boot injection duration are used. The KIVA4-CHEMKIN code is used in conjunction with a phenomenological soot model and an improved kerosene-diesel reaction mechanism to study the combustion process and emissions formation. The phenomenological soot model consists of a number of sub-models from literature that accounts for soot particle inception, soot coagulation, soot surface growth via the hydrogen-abstrac tion-carbon-addition (HACA) mechanism and soot surface oxidation by oxygen (O-2) and hydroxyl radical (OH). It should be noted that the improved kerosene-diesel reaction mechanism is robust enough to predict the combustion and emissions trends of kerosene with respect to diesel. From this study, boot injection rate-shapes are seen to cause combustion phasing and cause lower nitrogen oxide (NO) emissions in general. Furthermore, it is observed that when kerosene replaces diesel, engine efficiency and NO emissions increase while carbon monoxide (CO) and soot emissions decrease. Soot mass quantity, soot particle number and soot particle size are the lowest for pure kerosene combustion. Finally, detailed analyses of the effects of boot injection rate-shapes on soot particle dynamics are also presented. (C) 2017 Elsevier Ltd. All rights reserved.
机译：在这项工作中，通过数值模拟研究了引导喷射速率形状对以煤油和柴油为燃料的直喷压缩点火发动机的燃烧过程和排放形成的影响。使用具有变化的引导注入速度和引导注入持续时间的引导注入速率形状。 KIVA4-CHEMKIN代码与现象学的烟尘模型和改进的煤油-柴油反应机理结合使用，以研究燃烧过程和排放形成。现象学的烟灰模型由文献中的许多子模型组成，这些子模型解释了烟灰颗粒的形成，烟灰凝结，通过氢-吸收-碳加成（HACA）机理的烟灰表面生长以及氧气对烟灰表面的氧化作用（O- 2）和羟基（OH）。应当指出，改进的煤油-柴油反应机理足够鲁棒，可以预测煤油相对于柴油的燃烧和排放趋势。从这项研究中，可以看到引导注入速率形状会导致燃烧定相，并通常导致较低的氮氧化物（NO）排放。此外，已观察到，当煤油替代柴油时，发动机效率和NO排放量增加，而一氧化碳（CO）和烟尘排放量减少。对于纯煤油燃烧，烟灰质量量，烟灰颗粒数和烟灰颗粒尺寸最低。最后，还介绍了靴注入速率形状对烟尘颗粒动力学的影响的详细分析。 （C）2017 Elsevier Ltd.保留所有权利。

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  • 来源
    《Fuel》 |2017年第1期|430-444|共15页
  • 作者

    Tay Kun Lin; Yang Wenming; Zhao Feiyang; Yu Wenbin; Mohan Balaji;

  • 作者单位

    Natl Univ Singapore, Dept Mech Engn, 9 Engn Dr 1, Singapore 117576, Singapore;

    Natl Univ Singapore, Dept Mech Engn, 9 Engn Dr 1, Singapore 117576, Singapore;

    Natl Univ Singapore, Dept Mech Engn, 9 Engn Dr 1, Singapore 117576, Singapore;

    Natl Univ Singapore, Dept Mech Engn, 9 Engn Dr 1, Singapore 117576, Singapore;

    Natl Univ Singapore, Dept Mech Engn, 9 Engn Dr 1, Singapore 117576, Singapore;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Boot injection rate-shape; Low viscosity fuel; Soot particle dynamics; Nitrogen oxide; Carbon monoxide; Efficiency;

    机译：靴筒喷射速率形状;低粘度燃料;烟尘颗粒动力学;氮氧化物;一氧化碳;效率;

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