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Experimental and Simulation Investigations on Spray Characteristics and Influential Factors for the In-Cylinder Mixture Formation of Diesel Engines

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Proceedings of IncoME-V & CEPE Net-2020 (IncoME-V 2020)

Part of the book series: Mechanisms and Machine Science ((Mechan. Machine Science,volume 105))

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Abstract

In-cylinder fuel-air mixing quality is significant to improve economy performance, power performance, and emission performance of diesel engines. An in-cylinder mixture formation process is a complex unsteady process, which is influenced by a fuel injection system, fluid flow, and the geometry of a combustion chamber. Spray characteristics of a high pressure common rail diesel engine are investigated in this paper by using the methods of experimental and numerical simulations. The influence of different injection pressures and different back pressures on spray characteristics are studied, in a constant volume bomb by means of two high-speed cameras. Results show that the cavitation inside the injector affects the fuel-air mixing processes. It's possible to increase the chamfer at the entrance of the injection hole to suppress the cavitation phenomenon inside the injector. Increasing fuel injection pressure is conductive to the promotion of fuel diffusion and evaporation, thereby improving the uniformity of fuel-air mixture and the speed of fuel-air mixing processes. Higher back pressure can help to reduce the concentration of fuel-air mixture and improve mixture uniformity. However, it is an adverse effect on the speed of fuel-air mixing processes.

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Acknowledgements

This work was supported by the Chinese National Natural Science Foundation [grant numbers 51665021, 51805233].

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Authors and Affiliations

  1. Yunnan Key Lab of IC Engines, Kunming University of Science and Technology, Kunming, 650500, China

    Xiwen Deng, Hao Chen & Dewen Jia

Authors
  1. Xiwen Deng
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  2. Hao Chen
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  3. Dewen Jia
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Corresponding author

Correspondence to Dewen Jia .

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Editors and Affiliations

  1. School of Mechanical Engineering, Hebei University of Technology, Tianjin, China

    Dong Zhen

  2. School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, China

    Dong Wang

  3. Department of Mechanical Engineering, Tsinghua University, Beijing, China

    Tianyang Wang

  4. Beijing Information Science & Technology, Beijing, China

    Hongjun Wang

  5. Beijing Institute of Technology, Beijing, China

    Baoshan Huang

  6. University of Manchester, Manchester, UK

    Jyoti K. Sinha

  7. University of Huddersfield, Huddersfield, UK

    Andrew David Ball

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Deng, X., Chen, H., Jia, D. (2021). Experimental and Simulation Investigations on Spray Characteristics and Influential Factors for the In-Cylinder Mixture Formation of Diesel Engines. In: Zhen, D., et al. Proceedings of IncoME-V & CEPE Net-2020. IncoME-V 2020. Mechanisms and Machine Science, vol 105. Springer, Cham. https://doi.org/10.1007/978-3-030-75793-9_12

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  • DOI: https://doi.org/10.1007/978-3-030-75793-9_12

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  • Publisher Name: Springer, Cham

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  • Online ISBN: 978-3-030-75793-9

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