• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文学位 >Computational modeling of nitrogen oxide emissions from biodiesel combustion based on accurate fuel properties.
【24h】

Computational modeling of nitrogen oxide emissions from biodiesel combustion based on accurate fuel properties.

机译：基于精确燃料特性的生物柴油燃烧过程中氮氧化物排放的计算模型。

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

Biodiesel is a promising alternative to petroleum-based diesel fuel because it is renewable and its extensive use in unmodified engines has proved to be very successful. However, its future use may be limited by the higher oxides of nitrogen (NOx) emissions that are typically generated relative to petroleum diesel. The purpose of this research was to increase the scientific understanding of the fundamental mechanisms of NO x generation in diesel engines fueled with biodiesel through modeling of the spray, ignition and combustion process of biodiesel, and to evaluate some strategies for reducing NOx emissions.; Computational methods were developed to estimate the physical and thermodynamic properties of biodiesel for combustion modeling. A computer software program, BDProp 1.0, was developed based on the property estimation methods. The estimated results were compared to measured or published data where available and were found to be sufficiently accurate for use as a fuel definition for biodiesel combustion modeling efforts.; The computational modeling of the spray, ignition, combustion, and NO x emissions of biodiesel in diesel engines was conducted. Several sub-models were developed for KIVA-3V to include biodiesel in the fuel library. The predicted cylinder pressure, heat release and NOx emissions from the modified KIVA-3V model were compared to and were found to be in close agreement with experimental data that were collected from a John Deere 4045T diesel engine fueled with diesel (D2), soybean methyl ester (SME), yellow grease methyl ester (YGME), and genetically modified soybean methyl ester (GMSME). Higher overall cylinder temperatures were observed for SME compared to D2, which was regarded as a direct cause of the higher NOx emissions of SME. Based on the computational modeling results, the higher overall cylinder temperatures of SME were attributed to the earlier start of injection and decreased spray cone angle, which were seen as the leading reasons for higher NOx emissions.; Computational modeling was applied to evaluate strategies for reducing NOx emissions from biodiesel combustion. The results indicated that increasing spray cone angle, retarding start of injection, applying exhaust gas recirculation (EGR) and charge air cooling were all effective in reducing NOx emissions from biodiesel.
机译：生物柴油是石油基柴油燃料的有前途的替代品，因为它是可再生的，并且在未经修饰的发动机中广泛使用已证明是非常成功的。但是，其未来使用可能会受到通常相对于石油柴油产生的较高氮氧化物（NOx）排放的限制。这项研究的目的是通过对生物柴油的喷雾，着火和燃烧过程进行建模，从而增加对生物柴油燃料柴油机中NOx产生的基本机理的科学认识，并评估一些减少NOx排放的策略。开发了计算方法以估算用于燃烧建模的生物柴油的物理和热力学性质。基于属性估计方法，开发了计算机软件程序BDProp 1.0。将估计结果与测量或已公布的数据（如果有）进行比较，发现它们足够准确，可用作生物柴油燃烧建模工作的燃料定义。进行了柴油机中生物柴油的喷雾，点火，燃烧和NOx排放的计算模型。为KIVA-3V开发了几个子模型，以将生物柴油包括在燃料库中。将修改后的KIVA-3V模型的预测气缸压力，放热和NOx排放进行了比较，发现与从约翰迪尔4045T柴油机（D2），大豆甲基化燃料中收集的实验数据非常吻合。酯（SME），黄色油脂甲酯（YGME）和转基因大豆甲酯（GMSME）。与D2相比，SME的总气缸温度更高，这被认为是SME NOx排放较高的直接原因。根据计算模型结果，SME的总气缸温度较高归因于喷射开始较早和喷雾锥角减小，这被视为导致NOx排放量增加的主要原因。应用计算模型来评估减少生物柴油燃烧产生的NOx排放的策略。结果表明，增加喷雾锥角，延迟喷射开始，应用废气再循环（EGR）和增压空气冷却都可以有效减少生物柴油中的NOx排放。

著录项

  • 作者

    Yuan, Wenqiao.;

  • 作者单位

    University of Illinois at Urbana-Champaign.;

  • 授予单位 University of Illinois at Urbana-Champaign.;
  • 学科 Engineering Agricultural.
  • 学位 Ph.D.
  • 年度 2005
  • 页码 150 p.
  • 总页数 150
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 农业工程;
  • 关键词

  • 入库时间 2022-08-17 11:42:18

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