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Numerical analysis of two-stroke free piston engine operating on HCCI combustion

Author

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  • Xu, Shuaiqing
  • Wang, Yang
  • Zhu, Tao
  • Xu, Tao
  • Tao, Chengjun

Abstract

An opposed-piston hydraulic free piston engine operating with homogenous charge compression ignition (HCCI) combustion, has been proposed by State Key Laboratory of Engines as a means of significantly improving the IC engine’s cycle thermal efficiency and lowering exhaust emissions. Single and multi-zone Chemkin model with detailed chemical kinetics, and unique piston dynamics extracted from one dimensional gas dynamic model, have been used to analyze the combustion characteristics and engine performance. Intake heating, variable compression ratio and internal EGR are utilized to control the combustion phasing and duration in the cycle simulations, revealing the critical factors and possible limits of performance improvement relative to conventional crank engines. Furthermore, real engine effects such as heat transfer with air swirl, residual mass fraction, thermal stratification, and heat loss fraction between zones are considered in the sequential CFD/multi-zone method to approach the realistic engine performance at an acceptable knock level.

Suggested Citation

  • Xu, Shuaiqing & Wang, Yang & Zhu, Tao & Xu, Tao & Tao, Chengjun, 2011. "Numerical analysis of two-stroke free piston engine operating on HCCI combustion," Applied Energy, Elsevier, vol. 88(11), pages 3712-3725.
    • Handle: RePEc:eee:appene:v:88:y:2011:i:11:p:3712-3725
    DOI: 10.1016/j.apenergy.2011.05.002
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    References listed on IDEAS

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    1. Mikalsen, R. & Roskilly, A.P., 2009. "Coupled dynamic-multidimensional modelling of free-piston engine combustion," Applied Energy, Elsevier, vol. 86(1), pages 89-95, January.
    2. Mikalsen, R. & Roskilly, A.P., 2009. "A computational study of free-piston diesel engine combustion," Applied Energy, Elsevier, vol. 86(7-8), pages 1136-1143, July.
    3. Gan, Suyin & Ng, Hoon Kiat & Pang, Kar Mun, 2011. "Homogeneous Charge Compression Ignition (HCCI) combustion: Implementation and effects on pollutants in direct injection diesel engines," Applied Energy, Elsevier, vol. 88(3), pages 559-567, March.
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    1. 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.
    2. 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.
    3. 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.
    4. Geng, Heming & Wang, Yang & Zhen, Xudong & Liu, Yu & Li, Zhiyong, 2018. "Study on adaptive behavior and mechanism of compression ratio (or piston motion profile) for combustion parameters in hydraulic free piston engine," Applied Energy, Elsevier, vol. 211(C), pages 921-928.
    5. Hung, Nguyen Ba & Lim, Ocktaeck, 2016. "A review of free-piston linear engines," Applied Energy, Elsevier, vol. 178(C), pages 78-97.
    6. Hung, Nguyen Ba & Lim, Ocktaeck & Iida, Norimasa, 2015. "The effects of key parameters on the transition from SI combustion to HCCI combustion in a two-stroke free piston linear engine," Applied Energy, Elsevier, vol. 137(C), pages 385-401.
    7. 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.
    8. Lim, Ocktaeck & Hung, Nguyen Ba & Oh, Seokyoung & Kim, Gangchul & Song, Hanho & Iida, Norimasa, 2015. "A study of operating parameters on the linear spark ignition engine," Applied Energy, Elsevier, vol. 160(C), pages 746-760.
    9. Zhu, Mingming & Ma, Yu & Zhang, Dongke, 2012. "Effect of a homogeneous combustion catalyst on the combustion characteristics and fuel efficiency in a diesel engine," Applied Energy, Elsevier, vol. 91(1), pages 166-172.
    10. Zhu, Yongsheng & Wang, Yang & Zhen, Xudong & Guan, Shuai & Wang, Jiancai & Wu, Yining & Chen, Yujin & Yin, Shujun, 2014. "The control of an opposed hydraulic free piston engine," Applied Energy, Elsevier, vol. 126(C), pages 213-220.
    11. Chiang, Chia-Jui & Yang, Jing-Long & Lan, Shao-Ya & Shei, Tsung-Wei & Chiang, Wen-Shu & Chen, Bo-Liang, 2013. "Dynamic modeling of a SI/HCCI free-piston engine generator with electric mechanical valves," Applied Energy, Elsevier, vol. 102(C), pages 336-346.
    12. 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.
    13. Zhang, Shuanlu & Zhao, Changlu & Zhao, Zhenfeng, 2015. "Stability analysis of hydraulic free piston engine," Applied Energy, Elsevier, vol. 157(C), pages 805-813.

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