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Modelling soot formation from wall films in a gasoline direct injection engine using a detailed population balance model

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  • Wang, Buyu
  • Mosbach, Sebastian
  • Schmutzhard, Sebastian
  • Shuai, Shijin
  • Huang, Yaqing
  • Kraft, Markus

Abstract

In this study, soot formation in a Gasoline Direct Injection (GDI) engine is simulated using a Stochastic Reactor Model (SRM Engine Suite) which contains a detailed population balance soot model capable of describing particle morphology and chemical composition. In order to describe the soot formation originating from the wall film, the SRM Engine Suite is extended to include spray impingement and wall film evaporation models. The cylinder is divided into a wall and a bulk zone to resolve the equivalence ratio and temperature distributions of the mixture near the wall. The combustion chamber wall is assumed to exchange heat directly only with the wall zone. The turbulent mixing within each zone and between the two zones are simulated with different mixing models. The effects of key parameters on the temperature and equivalence ratio in the two zones are investigated. The mixing rate between the wall and bulk zone has a significant effect on the wall zone, whilst the mixing rate in the wall zone only has a negligible impact on the temperature and equivalence ratio below a certain threshold. Experimental data are obtained from a four-cylinder, gasoline-fuelled direct injection spark ignition engine operated stoichiometrically. An injection timing sweep, ranging from 120 CAD BTDC to 330 CAD BTDC, is conducted in order to investigate the effect of spray impingement on soot formation. The earliest injection case (330 CAD BTDC), which produces significantly higher levels of particle emissions than any other case, is simulated by the current model. It is found that the in-cylinder pressure and the heat release rate match well with the experimental data. The particle size distribution in the simulation has the same order of magnitude as the experimental one. By tracing the particles in an equivalence ratio-temperature diagram, it is demonstrated that the rich mixture near the wall becomes the source of the soot formation as a result of the wall film evaporation.

Suggested Citation

  • Wang, Buyu & Mosbach, Sebastian & Schmutzhard, Sebastian & Shuai, Shijin & Huang, Yaqing & Kraft, Markus, 2016. "Modelling soot formation from wall films in a gasoline direct injection engine using a detailed population balance model," Applied Energy, Elsevier, vol. 163(C), pages 154-166.
    • Handle: RePEc:eee:appene:v:163:y:2016:i:c:p:154-166
    DOI: 10.1016/j.apenergy.2015.11.011
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    Cited by:

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    2. Liu, Xinlei & Wang, Hu & Wang, Xiaofeng & Zheng, Zunqing & Yao, Mingfa, 2017. "Experimental and modelling investigations of the diesel surrogate fuels in direct injection compression ignition combustion," Applied Energy, Elsevier, vol. 189(C), pages 187-200.
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    4. E, Jiaqiang & Zhao, Xiaohuan & Liu, Guanlin & Zhang, Bin & Zuo, Qingsong & Wei, Kexiang & Li, Hongmei & Han, Dandan & Gong, Jinke, 2019. "Effects analysis on optimal microwave energy consumption in the heating process of composite regeneration for the diesel particulate filter," Applied Energy, Elsevier, vol. 254(C).
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    6. Costa, M. & Catapano, F. & Sementa, P. & Sorge, U. & Vaglieco, B.M., 2016. "Mixture preparation and combustion in a GDI engine under stoichiometric or lean charge: an experimental and numerical study on an optically accessible engine," Applied Energy, Elsevier, vol. 180(C), pages 86-103.
    7. Wang, Dongfang & Zhang, Jiahao & Li, Yikai & Shi, Zhongjie & Yang, Ziming, 2023. "Experimental investigation of a post-combustion pool fire phenomenon due to the spray-wall interaction under DI engine-like cold-start conditions," Energy, Elsevier, vol. 274(C).
    8. Slavchov, Radomir I. & Mosbach, Sebastian & Kraft, Markus & Pearson, Richard & Filip, Sorin V., 2018. "An adsorption-precipitation model for the formation of injector external deposits in internal combustion engines," Applied Energy, Elsevier, vol. 228(C), pages 1423-1438.
    9. Wu, Shaohua & Yang, Wenming & Xu, Hongpeng & Jiang, Yu, 2019. "Investigation of soot aggregate formation and oxidation in compression ignition engines with a pseudo bi-variate soot model," Applied Energy, Elsevier, vol. 253(C), pages 1-1.
    10. Del Pecchia, Marco & Fontanesi, Stefano & Prager, Jens & Kralj, Cedomir & Lehtiniemi, Harry, 2020. "A threshold soot index-based fuel surrogate formulation methodology to mimic sooting tendency of real fuels in 3D-CFD simulations," Applied Energy, Elsevier, vol. 280(C).
    11. Wu, Shaohua & Akroyd, Jethro & Mosbach, Sebastian & Brownbridge, George & Parry, Owen & Page, Vivian & Yang, Wenming & Kraft, Markus, 2020. "Efficient simulation and auto-calibration of soot particle processes in Diesel engines," Applied Energy, Elsevier, vol. 262(C).
    12. Rashwan, Sherif S. & Ibrahim, Abdelmaged H. & Abou-Arab, Tharwat W. & Nemitallah, Medhat A. & Habib, Mohamed A., 2016. "Experimental investigation of partially premixed methane–air and methane–oxygen flames stabilized over a perforated-plate burner," Applied Energy, Elsevier, vol. 169(C), pages 126-137.
    13. Wu, Shaohua & Zhou, Dezhi & Yang, Wenming, 2019. "Implementation of an efficient method of moments for treatment of soot formation and oxidation processes in three-dimensional engine simulations," Applied Energy, Elsevier, vol. 254(C).
    14. Jiang, Changzhao & Parker, Matthew C. & Butcher, Daniel & Spencer, Adrian & Garner, Colin P. & Helie, Jerome, 2019. "Comparison of flash boiling resistance of two injector designs and the consequences on downsized gasoline engine emissions," Applied Energy, Elsevier, vol. 254(C).
    15. Qian, Yong & Li, Zilong & Yu, Liang & Wang, Xiaole & Lu, Xingcai, 2019. "Review of the state-of-the-art of particulate matter emissions from modern gasoline fueled engines," Applied Energy, Elsevier, vol. 238(C), pages 1269-1298.
    16. Jia, Shuwei & Liu, Xiaolu & Yan, Guangle, 2019. "Effect of APCF policy on the haze pollution in China: A system dynamics approach," Energy Policy, Elsevier, vol. 125(C), pages 33-44.
    17. Yu, Shenghao & Yin, Bifeng & Bi, Qinsheng & Chen, Chen & Jia, Hekun, 2021. "Experimental and numerical investigation on inner flow and spray characteristics of elliptical GDI injectors with large aspect ratio," Energy, Elsevier, vol. 224(C).

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    Keywords

    GDI engine; Soot; Wall film;
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