Community Research and Development Information Service - CORDIS


LESSCO2 - Large Eddy Simulation techniques to Simulate and COntrol by design Cyclic variability in Otto cycle engines

Project ID: ENK6-CT-2002-00616
Funded under: FP5-EESD


The major objective of the work in LESSCO2 was to demonstrate the feasibility of industrial LES (Large Eddy Simulation) engine simulations, and their potential for addressing phenomena not accessible to today's RANS simulation tools, and in particular the occurrence of cycle to cycle variations. The realised research was limited to spark ignited premixed combustion engines.
In a first project phase, the necessary theoretical basis was to be laid by the R&D partners, to yield research tools and models adapted to LES in piston engines. Phenomena that were to be addressed were liquid fuel injection, premixed combustion and knock, as well as adapted boundary conditions and mesh management techniques. Experimental work was to furnish data for validating these developments. In a second project phase, the originality of LESSCO2 was that while further improving the theoretical basis, an important effort was dedicated to an efficient transfer to the industrial partners in order to allow them to perform LES simulations of flow and combustion in real engine geometries. As a major outcome, the participating industrial partners aimed at being able to perform multi-cycle LES engine simulations at the project end, which had never been realised prior to LESSCO2.

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