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首页> 外文学位 >A Parametric Study on the Effects of Ignition Timing, Spark Plug Type, and Exhaust Gas Recirculation on a Legacy 2-Stroke Lean Burn Natural Gas Engine.
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A Parametric Study on the Effects of Ignition Timing, Spark Plug Type, and Exhaust Gas Recirculation on a Legacy 2-Stroke Lean Burn Natural Gas Engine.

机译：对传统2冲程稀燃天然气发动机的点火正时，火花塞类型和废气再循环影响的参数研究。

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摘要

In the natural gas industry, approximately 27 million horsepower is used for transmission and storage, necessary to transport natural gas to its respective destinations. Engine technologies in operation dating back to the 1940's are still in use today. Within this array of prime-movers, exist compressors powered by large bore 2-stroke, lean-burn, natural gas engines. Reduction of exhaust emissions without negative impacts on engine performance is the main focus for operators. Research regarding engine fuel delivery, ignition techniques, and post-combustion techniques show potential improvements in engine performance and exhaust emissions. However, research pertaining to spark plug design and exhaust gas recirculation on this class of engines is limited. The goal of this study was to examine the effects, of such parameters, on engine performance and exhaust gas emissions. The test platform was a single cylinder AJAX E-42 engine, common to the natural gas gathering and compression sector. The engine was operated at 525 RPM and 400 ft. -- lbs. of torque for all test scenarios. The spark plug type recommended by the engine manufacture was analyzed to determine engine performance and exhaust gas emissions. Four additional spark plug configurations were examined for their effects engine performance and exhaust gas emissions and compared to those of the manufacture specified spark plug. The effects of ignition timing were also examined for increased efficiency and improved exhaust emissions for each spark plug configuration. Reductions of 32% for CO and 89% for VOCs were found for a fine center electrode side-gap style spark plug compared to a conventional j-gap center electrode style. The spark plug configuration with the highest performance, based on fuel consumption and emissions, was examined with the effect of EGR. Increases in engine stability and fuel economy of 15% were found, in addition to reductions in NOx formation up to 16%. Formaldehyde formation was also reduced up to 3%, the magnitude of all improvements varied depending on ignition timing and EGR level.
机译：在天然气工业中，约有2700万马力用于传输和存储，这是将天然气运输到其各自目的地的必要条件。可以追溯到1940年代的发动机技术一直在使用。在这一系列的原动机中，存在着由大口径二冲程稀薄燃烧天然气发动机提供动力的压缩机。减少废气排放而又不对发动机性能造成负面影响是操作人员的主要重点。有关发动机燃油输送，点火技术和后燃烧技术的研究表明，发动机性能和废气排放有潜在的改善。然而，关于这类发动机的火花塞设计和废气再循环的研究是有限的。这项研究的目的是研究这些参数对发动机性能和废气排放的影响。测试平台是天然气收集和压缩领域通用的单缸AJAX E-42发动机。发动机以525 RPM和400英尺-磅的功率运行。所有测试场景的扭矩。分析了发动机制造商推荐的火花塞类型，以确定发动机性能和废气排放。检查了另外四个火花塞配置对发动机性能和废气排放的影响，并与制造商指定的火花塞进行了比较。还检查了点火正时的影响，以提高效率并改善每种火花塞配置的废气排放。与传统的j型间隙中心电极相比，精细的中心电极侧隙型火花塞的CO降低了32％，VOC降低了89％。基于EGR的影响，基于燃油消耗和排放，对性能最高的火花塞配置进行了检查。除了减少高达16％的NOx生成外，还发现发动机稳定性和燃油经济性提高了15％。甲醛的形成也减少了多达3％，所有改善的幅度取决于点火正时和EGR水平。

著录项

  • 作者

    Fowler, Nathaniel P.;

  • 作者单位

    West Virginia University.;

  • 授予单位 West Virginia University.;
  • 学科 Mechanical engineering.
  • 学位 M.S.
  • 年度 2016
  • 页码 129 p.
  • 总页数 129
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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