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Multi-dimensional scavenging analysis of a free-piston linear alternator based on numerical simulation

Author

Listed:
  • Mao, Jinlong
  • Zuo, Zhengxing
  • Li, Wen
  • Feng, Huihua

Abstract

A free-piston linear alternator (FPLA) is being developed by the Beijing Institute of Technology to improve the thermal efficiency relative to conventional crank-driven engines. A two-stroke scavenging process recharges the engine and is crucial to realizing the continuous operation of a free-piston engine. In order to study the FPLA scavenging process, the scavenging system was configured using computational fluid dynamics. As the piston dynamics of the FPLA are different to conventional crank-driven two-stroke engines, a time-based numerical simulation program was built using Matlab to define the piston's motion profiles. A wide range of design and operating options were investigated including effective stroke length, valve overlapping distance, operating frequency and charging pressure to find out their effects on the scavenging performance. The results indicate that a combination of high effective stroke length to bore ratio and long valve overlapping distance with a low supercharging pressure has the potential to achieve high scavenging and trapping efficiencies with low short-circuiting losses.

Suggested Citation

  • Mao, Jinlong & Zuo, Zhengxing & Li, Wen & Feng, Huihua, 2011. "Multi-dimensional scavenging analysis of a free-piston linear alternator based on numerical simulation," Applied Energy, Elsevier, vol. 88(4), pages 1140-1152, April.
    • Handle: RePEc:eee:appene:v:88:y:2011:i:4:p:1140-1152
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    Citations

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    Cited by:

    1. Peng Sun & Chi Zhang & Jinhua Chen & Fei Zhao & Youyong Liao & Guilin Yang & Chinyin Chen, 2017. "Hybrid System Modeling and Full Cycle Operation Analysis of a Two-Stroke Free-Piston Linear Generator," Energies, MDPI, vol. 10(2), pages 1-23, February.
    2. Zhang, Zhiyuan & Feng, Huihua & Jia, Boru & Zuo, Zhengxing & Yan, Xiaodong & Smallbone, Andrew & Roskilly, Anthony Paul, 2022. "Identification and analysis on the variation sources of a dual-cylinder free piston engine generator and their influence on system operating characteristics," Energy, Elsevier, vol. 242(C).
    3. Wu, Limin & Feng, Huihua & Jia, Boru & Tang, Zhifeng & Yan, Xiaodong & Wang, Wei, 2022. "A novel method to investigate the power generation characteristics of linear generator in full frequency operation range applied to opposed-piston free-piston engine generator _ Simulation and test re," Energy, Elsevier, vol. 254(PB).
    4. Wang, Yaodong & Chen, Lin & Jia, Boru & Roskilly, Anthony Paul, 2017. "Experimental study of the operation characteristics of an air-driven free-piston linear expander," Applied Energy, Elsevier, vol. 195(C), pages 93-99.
    5. Yan, Xiaodong & Feng, Huihua & Zuo, Zhengxing & Zhang, Zhiyuan & Wu, Limin & Shi, Cheng, 2021. "A study on the working characteristics of free piston linear generator with dual cylinder configuration by different secondary injection strategies," Energy, Elsevier, vol. 233(C).
    6. Peng Sun & Chi Zhang & Jinhua Chen & Fei Zhao & Youyong Liao & Guilin Yang & Chinyin Chen, 2016. "Decoupling Design and Verification of a Free-Piston Linear Generator," Energies, MDPI, vol. 9(12), pages 1-23, December.
    7. Ayodeji Sowale & Athanasios J. Kolios, 2018. "Thermodynamic Performance of Heat Exchangers in a Free Piston Stirling Engine," Energies, MDPI, vol. 11(3), pages 1-20, February.
    8. Mao, Jinlong & Zuo, Zhengxing & Feng, Huihua, 2011. "Parameters coupling designation of diesel free-piston linear alternator," Applied Energy, Elsevier, vol. 88(12), pages 4577-4589.
    9. Jia, Boru & Smallbone, Andrew & Feng, Huihua & Tian, Guohong & Zuo, Zhengxing & Roskilly, A.P., 2016. "A fast response free-piston engine generator numerical model for control applications," Applied Energy, Elsevier, vol. 162(C), pages 321-329.
    10. Yuan, Chenheng & Feng, Huihua & He, Yituan & Xu, Jing, 2016. "Combustion characteristics analysis of a free-piston engine generator coupling with dynamic and scavenging," Energy, Elsevier, vol. 102(C), pages 637-649.
    11. Zhang, Shuanlu & Zhao, Changlu & Zhao, Zhenfeng, 2015. "Stability analysis of hydraulic free piston engine," Applied Energy, Elsevier, vol. 157(C), pages 805-813.
    12. Huihua Feng & Yuyao Guo & Yu Song & Chendong Guo & Zhengxing Zuo, 2016. "Study of the Injection Control Strategies of a Compression Ignition Free Piston Engine Linear Generator in a One-Stroke Starting Process," Energies, MDPI, vol. 9(6), pages 1-19, June.
    13. Ayodeji Sowale & Edward J. Anthony & Athanasios John Kolios, 2018. "Optimisation of a Quasi-Steady Model of a Free-Piston Stirling Engine," Energies, MDPI, vol. 12(1), pages 1-17, December.
    14. Jia, Boru & Zuo, Zhengxing & Feng, Huihua & Tian, Guohong & Smallbone, Andrew & Roskilly, A.P., 2016. "Effect of closed-loop controlled resonance based mechanism to start free piston engine generator: Simulation and test results," Applied Energy, Elsevier, vol. 164(C), pages 532-539.
    15. 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.
    16. Huihua Feng & Yu Song & Zhengxing Zuo & Jiao Shang & Yaodong Wang & Anthony Paul Roskilly, 2015. "Stable Operation and Electricity Generating Characteristics of a Single-Cylinder Free Piston Engine Linear Generator: Simulation and Experiments," Energies, MDPI, vol. 8(2), pages 1-21, January.
    17. Wu, Wei & Hu, Jibin & Yuan, Shihua, 2014. "Semi-analytical modelling of a hydraulic free-piston engine," Applied Energy, Elsevier, vol. 120(C), pages 75-84.
    18. Boru Jia & Yaodong Wang & Andrew Smallbone & Anthony Paul Roskilly, 2018. "Analysis of the Scavenging Process of a Two-Stroke Free-Piston Engine Based on the Selection of Scavenging Ports or Valves," Energies, MDPI, vol. 11(2), pages 1-14, February.
    19. Yuan, Chenheng & Liu, Yang & Han, Cuijie & He, Yituan, 2019. "An investigation of mixture formation characteristics of a free-piston gasoline engine with direct-injection," Energy, Elsevier, vol. 173(C), pages 626-636.
    20. Guo, Chendong & Zuo, Zhengxing & Feng, Huihua & Jia, Boru & Roskilly, Tony, 2020. "Review of recent advances of free-piston internal combustion engine linear generator," Applied Energy, Elsevier, vol. 269(C).
    21. Feng, Huihua & Guo, Chendong & Yuan, Chenheng & Guo, Yuyao & Zuo, Zhengxing & Roskilly, Anthony Paul & Jia, Boru, 2016. "Research on combustion process of a free piston diesel linear generator," Applied Energy, Elsevier, vol. 161(C), pages 395-403.
    22. Yuxi Miao & Zhengxing Zuo & Huihua Feng & Chendong Guo & Yu Song & Boru Jia & Yuyao Guo, 2016. "Research on the Combustion Characteristics of a Free-Piston Gasoline Engine Linear Generator during the Stable Generating Process," Energies, MDPI, vol. 9(8), pages 1-19, August.
    23. Jia, Boru & Tian, Guohong & Feng, Huihua & Zuo, Zhengxing & Roskilly, A.P., 2015. "An experimental investigation into the starting process of free-piston engine generator," Applied Energy, Elsevier, vol. 157(C), pages 798-804.
    24. Chendong Guo & Yahui Wang & Liang Tong & Huihua Feng & Zhengxing Zuo & Boru Jia, 2023. "Research on Piston Dynamics and Engine Performances of a Free-Piston Engine Linear Generator Coupling with Various Rebound Devices," Energies, MDPI, vol. 16(18), pages 1-20, September.

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