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Effects of Scavenging System Configuration on In-Cylinder Air Flow Organization of an Opposed-Piston Two-Stroke Engine

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  • Fukang Ma

    (School of Mechanical and Vehicle Engineering, Beijing Institute of Technology, Zhongguancun South Street No.5, Beijing 100081, China
    School of Mechanical and Power Engineering, North University of China, University Road No.3, Taiyuan 030051, China)

  • Changlu Zhao

    (School of Mechanical and Vehicle Engineering, Beijing Institute of Technology, Zhongguancun South Street No.5, Beijing 100081, China)

  • Fujun Zhang

    (School of Mechanical and Vehicle Engineering, Beijing Institute of Technology, Zhongguancun South Street No.5, Beijing 100081, China)

  • Zhenfeng Zhao

    (School of Mechanical and Vehicle Engineering, Beijing Institute of Technology, Zhongguancun South Street No.5, Beijing 100081, China)

  • Shuanlu Zhang

    (School of Mechanical and Vehicle Engineering, Beijing Institute of Technology, Zhongguancun South Street No.5, Beijing 100081, China)

Abstract

In-cylinder air flow is very important from the point of view of mixture formation and combustion. In this direction, intake chamber structure and piston crown shape play a very crucial role for in-cylinder air pattern of opposed-piston two-stroke (OP2S) engines. This study is concerned with the three-dimensional (3D) computational fluid dynamics (CFD) analysis of in-cylinder air motion coupled with the comparison of predicted results with the zero-dimensional (0D) parametric model. Three configurations viz ., a flat piston uniform scavenging chamber, a flat piston non-uniform scavenging chamber and a pit piston non-uniform scavenging chamber have been studied. 0D model analysis of in-cylinder air flow is consistent with 3D CFD simulation. It is concluded that a pit piston non-uniform scavenging chamber is the best design from the point of view of tumble ratio, turbulent kinetic energy and turbulent intensity, which play very important roles in imparting proper air motion. Meanwhile a flat piston uniform scavenging chamber can organize a higher swirl ratio and lower tumble ratio which is important to improve the scavenging process.

Suggested Citation

  • Fukang Ma & Changlu Zhao & Fujun Zhang & Zhenfeng Zhao & Shuanlu Zhang, 2015. "Effects of Scavenging System Configuration on In-Cylinder Air Flow Organization of an Opposed-Piston Two-Stroke Engine," Energies, MDPI, vol. 8(6), pages 1-19, June.
    • Handle: RePEc:gam:jeners:v:8:y:2015:i:6:p:5866-5884:d:51259
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    References listed on IDEAS

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    Cited by:

    1. Fukang Ma & Lei Zhang & Tiexiong Su, 2018. "Simulation Modeling and Optimization of Uniflow Scavenging System Parameters on Opposed-Piston Two-Stroke Engines," Energies, MDPI, vol. 11(4), pages 1-15, April.
    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. Lei Zhang & Tiexiong Su & Yangang Zhang & Fukang Ma & Jinguan Yin & Yaonan Feng, 2017. "Numerical Investigation of the Effects of Split Injection Strategies on Combustion and Emission in an Opposed-Piston, Opposed-Cylinder (OPOC) Two-Stroke Diesel Engine," Energies, MDPI, vol. 10(5), pages 1-17, May.
    4. Yi Lu & Changlu Zhao & Zhe Zuo & Fujun Zhang & Shuanlu Zhang, 2017. "Research on the Common Rail Pressure Overshoot of Opposed-Piston Two-Stroke Diesel Engines," Energies, MDPI, vol. 10(4), pages 1-23, April.
    5. Fu-Kang Ma & Jun Wang & Yao-Nan Feng & Yan-Gang Zhang & Tie-Xiong Su & Yi Zhang & Yu-Hang Liu, 2017. "Parameter Optimization on the Uniflow Scavenging System of an OP2S-GDI Engine Based on Indicated Mean Effective Pressure (IMEP)," Energies, MDPI, vol. 10(3), pages 1-20, March.
    6. Tianyou Pei & Feixue Chen & Shuheng Qiu & Dawei Wu & Weiwei Gao & Zhaoping Xu & Chi Zhang, 2022. "Research on the Intake Port of a Uniflow Scavenging GDI Opposed-Piston Two-Stroke Engine," Energies, MDPI, vol. 15(6), pages 1-15, March.
    7. Paul Stewart & Chris Bingham, 2016. "Electrical Power and Energy Systems for Transportation Applications," Energies, MDPI, vol. 9(7), pages 1-3, July.
    8. Jemni, Mohamed Ali & Kassem, Sahar Hadj & Driss, Zied & Abid, Mohamed Salah, 2018. "Effects of hydrogen enrichment and injection location on in-cylinder flow characteristics, performance and emissions of gaseous LPG engine," Energy, Elsevier, vol. 150(C), pages 92-108.

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