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Coupled dynamic-multidimensional modelling of free-piston engine combustion

Author

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  • Mikalsen, R.
  • Roskilly, A.P.

Abstract

Free-piston engines are under investigation by a number of research groups worldwide, as an alternative to conventional technology in applications such as electric and hydraulic power generation. The piston dynamics of the free-piston engine differ significantly from those of conventional engines, and this may influence in-cylinder gas motion, combustion and emissions formation. Due to the complex interaction between mechanics and thermodynamics, the modelling of free-piston engines is not straight-forward. This paper presents a novel approach to the modelling of free-piston engines through the introduction of solution-dependent mesh motion in an engine CFD code. The particular features of free-piston engines are discussed, and the model for engine dynamics implemented in the CFD code is described. Finally, the coupled solver is demonstrated through the modelling of a spark ignited free-piston engine generator.

Suggested Citation

  • 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.
    • Handle: RePEc:eee:appene:v:86:y:2009:i:1:p:89-95
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