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A real-time capable mixing controlled combustion model for highly diluted conditions

Author

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  • Dowell, P.G.
  • Akehurst, S.
  • Burke, R.D.

Abstract

A new real-time capable heat release rate model is presented that captures the high dilution effects of exhaust gas recirculation (EGR). The model is a Mixing Controlled Combustion type with enhancements to account for wall impingements, pilot injections, charge dilution caused by EGR at part load. The model was parameterised in two steps using a small set of measured data: the majority of model parameters were identified without EGR before identifying additional EGR related constants. The model performance was assessed based on key metrics: start of combustion; peak heat release and point of peak heat release and cylinder pressure. The model was evaluated over the full engine speed, load and EGR operating envelope and cylinder pressure metrics were predicted with R2 values above 0.94. With EGR, the model was able to predict qualitatively and quantitatively the performance whilst being parameterised by only by a small dataset. The model can be used to enable the engineering of robust new control algorithms and controller hardware for future engines using offline processes.

Suggested Citation

  • Dowell, P.G. & Akehurst, S. & Burke, R.D., 2017. "A real-time capable mixing controlled combustion model for highly diluted conditions," Energy, Elsevier, vol. 133(C), pages 1035-1049.
    • Handle: RePEc:eee:energy:v:133:y:2017:i:c:p:1035-1049
    DOI: 10.1016/j.energy.2017.05.171
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    Cited by:

    1. Zhaojie Shen & Wenzheng Cui & Xiaodong Ju & Zhongchang Liu & Shaohua Wu & Jianguo Yang, 2018. "Numerical Investigation on Effects of Assigned EGR Stratification on a Heavy Duty Diesel Engine with Two-Stage Fuel Injection," Energies, MDPI, vol. 11(3), pages 1-14, February.
    2. Yongming Feng & Haiyan Wang & Ruifeng Gao & Yuanqing Zhu, 2019. "A Zero-Dimensional Mixing Controlled Combustion Model for Real Time Performance Simulation of Marine Two-Stroke Diesel Engines," Energies, MDPI, vol. 12(10), pages 1-19, May.

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