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Study on the combustion process and work capacity of a micro free-piston engine

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Abstract

With the main idea of exploring combustion conditions and the work capacity of the micro free-piston engine, the study concern is visualization work including Homogeneous charge compression ignition (HCCI) combustion in the micro-chamber. The initial freepiston velocity was adjusted to achieve a wide range of compression ratio. The combustion characteristics, the piston motion and pressure variations under different compression ratios were discussed. Results indicate that the critical combustion condition occurs when the compression ratio rises to a certain degree. Two-stage combustion characteristics can be observed in micro HCCI combustion processes with the fuel of the DME/oxygen mixture. The micro-chamber pressure increases with the increase of the compression ratio. The critical peak pressure of 5.4 MPa is obtained when the initial piston velocity reaches 15.0 m/s and the diameter and the length of the microchamber is 3 mm and 37 mm, respectively.

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Authors and Affiliations

  1. School of Energy and Power Engineering, Jiangsu University, Zhenjiang, 212013, China

    Qian Wang, Liming Dai, Kai Wu & Jin Bai

  2. Institute for Energy Research, Jiangsu University, Zhenjiang, 212013, China

    Zhixia He

Authors
  1. Qian Wang
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  2. Liming Dai
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  3. Kai Wu
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  4. Jin Bai
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  5. Zhixia He
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Correspondence to Zhixia He.

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Recommended by Associate Editor Jeong Park

Qian Wang is a Professor in School of Energy and Power Engineering, Jiangsu University. He is also the Dean of School of Energy and Power Engineering. His research interests include Test and modeling on Combustion of Engines, Micro heat transfer and energy conversion with applications in micro power system.

Zhixia He is a Professor in Institute for Energy Research, Jiangsu University. She is also the Vice Director of Institute for Energy Research, Jiangsu University. Her research interests include Spray and Turbulent Combustion in Diesel Engines, Numerical Simulation and Visual Experiment of Cavitating Two-phase Flow in Injectors and Theory and Technology of Thermal Fluid in Utilization of Energy.

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Wang, Q., Dai, L., Wu, K. et al. Study on the combustion process and work capacity of a micro free-piston engine. J Mech Sci Technol 29, 4993–5000 (2015). https://doi.org/10.1007/s12206-015-1047-4

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  • DOI: https://doi.org/10.1007/s12206-015-1047-4

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