A quasi-dimensional charge motion and turbulence model for engine process calculations

Bossung, Christoph; Grill, Michael; Bargende, Michael; Dingel, Oliver

doi:10.1007/978-3-658-08844-6_68

Cited by 18 publications

(1 citation statement)

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“…Summarizing, none of these approaches is able to cope with modern complexity of fully variable valvetrains adjustable in intake valve lifts and valve timings because the flow fields and occurring turbulence differ widely. 12 The newly proposed turbulence model shall physically predict tumble and swirl-based motion and the production of turbulent kinetic energy based on a QD kÀe approach within all engine operations. It shall be utilized primarily within all types of QD combustion models-most notably the entrainment model 13,14 and the fractal model 15,16 -and second within QD wall heat transfer models.…”

Section: Introductionmentioning

confidence: 99%

A quasi-dimensional model of turbulence and global charge motion for spark ignition engines with fully variable valvetrains

Grasreiner

Neumann

Luttermann

et al. 2014

International Journal of Engine Research

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In this article, a new in-cylinder turbulence modeling approach aims at the improvement of quasi-dimensional simulations for modern spark ignition engines with fully variable valvetrains. Within the derived quasi-dimensional turbulence model, the turbulent production term can physically react on a change of engine operation (e.g. intake valve lift, intake valve timing, engine speed and boost pressure). Moreover, the approach offers access to detailed charge motion quantities for the first time in quasi-dimensional calculations. Hence, it is able to satisfy qualitative and quantitative turbulence descriptions within the entire operating range of the engine.

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