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

机译：船用柴油机燃烧极限特性及设计裕度的实验与数值研究

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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：本文建立了一个工作过程仿真模型，并分析了不同极限参数下柴油机最大输出功率的特性。通过数值和实验研究获得了船用柴油机的设计裕度。然后，通过仿真模型和单缸柴油机试验研究了极限特征线和设计裕量区域的理论确定方法。可以发现，使用最小二乘法拟合计算结果可以对极限特性进行定量分析，进而可以确定设计裕量区域。分析结果表明，柴油机的最大输出功率受缸内压力，涡轮转速和排气温度的限制。最大输出功率的极限参数在不同的速度下是不同的，在不同的极限参数下，最大输出功率的极限趋势也不同。此外，对工作区域的分析表明，船用柴油机在额定速度下的裕度约为27％，并且在高速运转时存在​​较大的设计裕度。

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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：极限特性;工作区域;设计余量;最小二乘法;实验研究;

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