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Experimental and numerical study on the combustion limiting characteristics and design margin of a marine diesel engine

机译：燃烧限制特性和船用柴油发动机设计边缘的实验和数值研究

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摘要

In this paper, a working-process simulation model was established, and the characteristics regarding the diesel engine maximum output power were analyzed under different limiting parameters. The design margin of the marine diesel engine is obtained through numerical and experimental study. Then, the simulation model and single cylinder diesel engine test were used to investigate the theoretical determination method of limiting characteristic lines and design margin area. It can be found that using least-square method to fit the calculation results can achieve quantitative analysis of limiting characteristics, and then the design margin area can be confirmed. The analysis results show that the maximum output power of the diesel engine is limited by in-cylinder pressure, turbine speed and exhaust temperature. The limiting parameters of maximum output power are different at different speeds, and the trend with speed of maximum output power are also different under different limiting parameters. Furthermore, the analysis of the operating area shows that the margin of the marine diesel engine at rated speed is about 27%, and there is a large design margin when operating at high speed.
机译：在本文中，建立了一个工作过程仿真模型，在不同限制参数下分析了关于柴油发动机最大输出功率的特性。通过数值和实验研究获得船用柴油发动机的设计边缘。然后，使用仿真模型和单缸柴油发动机试验来研究限制特征线和设计边缘区域的理论确定方法。可以发现，使用最小二乘法适合计算结果可以实现限制特性的定量分析，然后可以确认设计边缘区域。分析结果表明，柴油发动机的最大输出功率受缸内压力，涡轮速度和排气温度的限制。最大输出功率的限制参数以不同的速度不同，并且在不同的限制参数下，最大输出功率的速度也不同。此外，操作区域的分析表明，额定速度的船用柴油发动机的边缘约为27％，并且在高速操作时具有大的设计边距。

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  • 来源
    《Energy Sources》 |2019年第18期|2266-2280|共15页
  • 作者

    Wang Guixin; Yu Wenbin; Yang Rui; Li Xiaobo; Su Yanpan;

  • 作者单位

    Harbin Engn Univ Coll Power & Energy Engn Harbin 150001 Heilongjiang Peoples R China;

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

    Harbin Engn Univ Coll Power & Energy Engn Harbin 150001 Heilongjiang Peoples R China;

    Harbin Engn Univ Coll Power & Energy Engn Harbin 150001 Heilongjiang Peoples R China;

    Harbin Engn Univ Coll Power & Energy Engn Harbin 150001 Heilongjiang Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Limiting characteristics; operating area; design margin; least-square method; experimental study;

    机译：限制特性;工作区;设计边际;最小二乘法;实验研究;

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