• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>ASME Internal Combustion Engine Division technical conference >EXPERIMENTAL INVESTIGATION OF NO_x FORMATION IN A DUAL FUEL ENGINE
【24h】

EXPERIMENTAL INVESTIGATION OF NO_x FORMATION IN A DUAL FUEL ENGINE

机译：双燃料发动机中NO_x形成的实验研究

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The North American oil and gas industry has experienced a market pull for dual fuel (DF) engines that can run on any ratio of fuels ranging from 100% diesel to a high proportion of field gas relative to diesel, while also meeting the US Tier 4 Nonroad emissions standards. A DF engine must meet complex and at times competing requirements in terms of performance, fuel tolerance, and emissions. The challenges faced in designing a DF engine to meet all of the performance and emissions requirements require a detailed understanding of the trade-offs for each pollutant. This paper will focus on the details of NO_x formation for high substitution DF engines. Experimental results have demonstrated that NO_x emission trends (as a function of lambda) for DF engines differ from both traditional diesel engines and lean burn natural gas engines. For high energy substitution (>70%) conditions, NO_x emissions are a function of the premixed gas lambda (λ_(ng)) and contain a local minimum, with NO_x increasing as lambda is either leaned or rich-ened beyond the local minimum which occurs from approximately λ_(ng)= 1.7-1.85. It is hypothesized that at richer conditions (λ_(ng)< 1.7), NO_x formed in the burning of gaseous fuel results in increased total NO_x emissions. At leaner conditions (λ_(ng)> 1.85) the NO_x formed in the diesel post flame regions, as a result of increased oxygen availability, results in increased total NO_x emissions. Between these two regions there are competing effects which result in relatively constant NO_x.
机译：北美石油和天然气行业已经经历了双燃料（DF）发动机的市场拉动，该发动机可以使用任何比例的燃料，从100％柴油到相对于柴油而言高比例的现场燃气，同时还符合美国Tier 4级标准非道路排放标准。 DF发动机必须在性能，燃油耐受性和排放方面满足复杂的，有时甚至是竞争的要求。设计满足所有性能和排放要求的DF发动机时面临的挑战需要详细了解每种污染物的权衡取舍。本文将重点介绍高替代性DF发动机NO_x形成的细节。实验结果表明，DF发动机的NO_x排放趋势（作为Lambda的函数）不同于传统的柴油发动机和稀薄燃烧的天然气发动机。对于高能量替代（> 70％）条件，NO_x排放量是预混合气体lambda（λ_（ng））的函数，并包含一个局部最小值，随着lambda倾斜或富集超过局部最小值，NO_x会增加。从大约λ_（ng）= 1.7-1.85出现。假设在更丰富的条件下（λ_（ng）<1.7），在气体燃料燃烧中形成的NO_x导致总的NO_x排放增加。在较稀薄的条件下（λ_（ng）> 1.85），由于氧气利用率的提高，柴油后火焰区域中形成的NO_x导致总的NO_x排放量增加。在这两个区域之间存在竞争效应，导致NO_x相对恒定。

著录项

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