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Simulation Modeling Method and Experimental Investigation on the Uniflow Scavenging System of an Opposed-Piston Folded-Cranktrain Diesel Engine

Author

Listed:
  • Fukang Ma

    (School of Mechanical and Power Engineering, North University of China, Taiyuan 030051, China)

  • Zhenfeng Zhao

    (School of Mechanical and Vehicle Engineering, Beijing Institute of Technology, Beijing 100081, China)

  • Yangang Zhang

    (School of Mechanical and Power Engineering, North University of China, Taiyuan 030051, China)

  • Jun Wang

    (School of Mechanical and Power Engineering, North University of China, Taiyuan 030051, China)

  • Yaonan Feng

    (School of Mechanical and Power Engineering, North University of China, Taiyuan 030051, China)

  • Tiexiong Su

    (School of Mechanical and Power Engineering, North University of China, Taiyuan 030051, China)

  • Yi Zhang

    (School of Mechanical and Power Engineering, North University of China, Taiyuan 030051, China)

  • Yuhang Liu

    (School of Mechanical and Vehicle Engineering, Beijing Institute of Technology, Beijing 100081, China)

Abstract

The scavenging process for opposed-piston folded-cranktrain (OPFC) diesel engines can be described by the time evolution of the in-cylinder and exhaust chamber residual gas rates. The relation curve of in-cylinder and exhaust chamber residual gas rate is called scavenging profile, which is calculated through the changes of in-cylinder and exhaust chamber gas compositions determined by computational fluid dynamics (CFD) simulation. The scavenging profile is used to calculate the scavenging process by mono-dimensional (1D) simulation. The tracer gas method (TGM) is employed to validate the accuracy of the scavenging profile. At the same time, the gas exchange performance under different intake and exhaust state parameters was examined based on the TGM. The results show that the scavenging process from 1D simulation and experiment match well, which means the scavenging model obtained by CFD simulation performs well and validation of its effectiveness by TGM is possible. The difference between intake and exhaust pressure has a significant positive effect on the gas exchange performance and trapped gas mass, but the pressure difference has little effect on the scavenging efficiency and the trapped air mass if the delivery ratio exceeds 1.4.

Suggested Citation

  • Fukang Ma & Zhenfeng Zhao & Yangang Zhang & Jun Wang & Yaonan Feng & Tiexiong Su & Yi Zhang & Yuhang Liu, 2017. "Simulation Modeling Method and Experimental Investigation on the Uniflow Scavenging System of an Opposed-Piston Folded-Cranktrain Diesel Engine," Energies, MDPI, vol. 10(5), pages 1-18, May.
    • Handle: RePEc:gam:jeners:v:10:y:2017:i:5:p:727-:d:99217
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    References listed on IDEAS

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    1. Wu, Yining & Wang, Yang & Zhen, Xudong & Guan, Shuai & Wang, Jiancai, 2014. "Three-dimensional CFD (computational fluid dynamics) analysis of scavenging process in a two-stroke free-piston engine," Energy, Elsevier, vol. 68(C), pages 167-173.
    2. Sigurdsson, E. & Ingvorsen, K.M. & Jensen, M.V. & Mayer, S. & Matlok, S. & Walther, J.H., 2014. "Numerical analysis of the scavenge flow and convective heat transfer in large two-stroke marine diesel engines," Applied Energy, Elsevier, vol. 123(C), pages 37-46.
    3. Fukang Ma & Changlu Zhao & Fujun Zhang & Zhenfeng Zhao & Zhenyu Zhang & Zhaoyi Xie & Hao Wang, 2015. "An Experimental Investigation on the Combustion and Heat Release Characteristics of an Opposed-Piston Folded-Cranktrain Diesel Engine," Energies, MDPI, vol. 8(7), pages 1-17, June.
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    Cited by:

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    2. Alex G. Young & Aaron W. Costall & Daniel Coren & James W. G. Turner, 2021. "The Effect of Crankshaft Phasing and Port Timing Asymmetry on Opposed-Piston Engine Thermal Efficiency," Energies, MDPI, vol. 14(20), pages 1-20, October.
    3. Xu, Zheng & Ji, Fenzhu & Ding, Shuiting & Zhao, Yunhai & Zhang, Xiangbo & Zhou, Yu & Zhang, Qi & Du, Farong, 2020. "High-altitude performance and improvement methods of poppet valves 2-stroke aircraft diesel engine," Applied Energy, Elsevier, vol. 276(C).
    4. Yuan Qiao & Xucheng Duan & Kaisheng Huang & Yizhou Song & Jianan Qian, 2018. "Scavenging Ports’ Optimal Design of a Two-Stroke Small Aeroengine Based on the Benson/Bradham Model," Energies, MDPI, vol. 11(10), pages 1-26, October.

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