• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Energy Conversion & Management >Modeling study on the effect of piston bowl geometries in a gasoline/biodiesel fueled RCCI engine at high speed
【24h】

Modeling study on the effect of piston bowl geometries in a gasoline/biodiesel fueled RCCI engine at high speed

机译：汽油/生物柴油燃料RCCI发动机中活塞碗几何形状影响的高速建模研究

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This paper reports the numerical investigation on the effects of three bowl geometries on a gasoline/biodiesel fueled RCCI engine operated at high engine speed. The three bowl geometries are HCC (Hemispherical Combustion Chamber), SCC (Shallow depth Combustion Chamber) and OCC (Omega Combustion Chamber). To simulate the combustion in an RCCI engine, coupled KIVA4-CHEMKIN code was used. One recently developed reaction mechanism, which contains 107 species and 425 reactions, was adopted in this study to mimic the combustion of gasoline and biodiesel. During the simulation, the engine speed was fixed at 3600 rpm. The low reactivity fuel gasoline was premixed with air with energy percentages of 20% and 40%; accordingly, to maintain the same energy input, the percentages of biodiesel were 80% and 60% (B80 and B60). In addition, the SOI timing was varied at three levels: -11, -35 and -60 deg ATDC for B80 and B60, respectively. With SOI timing of -11 deg ATDC, the combustion is mixing-controlled; in contrast, advancing SOI timing to -60 deg ATDC, the combustion turns into the reactivity-controlled. Comparing the results on combustion characteristics, engine performance and emissions among different bowl geometries, it is concluded that the original OCC design for Toyota diesel engine is better for mixing-controlled combustion; whereas, SCC is the most suitable piston design for RCCI combustion among the three selected geometries under the investigated operating conditions of the engine. With SCC, better combustion and performance can be achieved while maintaining relatively lower CO, NO and soot emissions. (C) 2016 Elsevier Ltd. All rights reserved.
机译：本文报道了三种碗形几何形状对以高发动机转速运行的汽油/生物柴油燃料RCCI发动机的影响的数值研究。这三个碗的几何形状分别是HCC（半球形燃烧室），SCC（浅深度燃烧室）和OCC（欧米茄燃烧室）。为了模拟RCCI发动机中的燃烧，使用了耦合的KIVA4-CHEMKIN代码。这项研究采用了一种新近开发的反应机理，该机理包含107种和425个反应，以模仿汽油和生物柴油的燃烧。在模拟过程中，发动机转速固定为3600 rpm。将低反应性燃料汽油与能量百分比分别为20％和40％的空气预混合；因此，为了保持相同的能量输入，生物柴油的百分比分别为80％和60％（B80和B60）。此外，SOI时序在三个级别上有所不同：B80和B60的-11度，-35度和-60度ATDC。 SOI定时为-11度ATDC，燃烧是混合控制的；相反，将SOI定时提前到-60度ATDC，燃烧变成了反应性受控的。比较不同碗形几何形状的燃烧特性，发动机性能和排放的结果，得出的结论是，丰田柴油机的原始OCC设计更适合混合控制燃烧。然而，在研究的发动机工况下，SCC是三种选定几何形状中最适合RCCI燃烧的活塞设计。使用SCC，可以在保持相对较低的CO，NO和烟尘排放的同时实现更好的燃烧和性能。 （C）2016 Elsevier Ltd.保留所有权利。

著录项

  • 来源
    《Energy Conversion & Management》 |2016年第3期|359-368|共10页
  • 作者

    Li J.; Yang W. M.; Zhou D. Z.;

  • 作者单位

    Natl Univ Singapore, Dept Mech Engn, Fac Engn, Singapore 117575, Singapore;

    Natl Univ Singapore, Dept Mech Engn, Fac Engn, Singapore 117575, Singapore;

    Natl Univ Singapore, Dept Mech Engn, Fac Engn, Singapore 117575, 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

    RCCI; Riodiesel; Gasoline; Bowl geometry; KIVA;

    机译：RCCI;柴油;汽油;碗形;KIVA;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号