Coupled dynamic-multidimensional modelling of free-piston engine combustion

R. Mikalsen and A.P. Roskilly

Applied Energy, 2009, vol. 86, issue 1, 89-95

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.

Keywords: Free-piston; engine; Dynamic; modelling; CFD (search for similar items in EconPapers)
Date: 2009
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Citations: View citations in EconPapers (30)

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