TY - JOUR
AU1 - Iacovano, Clara
AU2 - d’Adamo, Alessandro
AU3 - Fontanesi, Stefano
AU4 - Di Ilio, Giovanni
AU5 - Krastev, Vesselin Krassimirov
AB - In the present paper, a comprehensive, wall-adapted zonal URANS/LES methodology is shown for the multidimensional simulation of modern direct-injection engines. This work is the latest update of a zonal hybrid turbulence modeling approach, specifically developed by the authors for a flexible description of in-cylinder turbulent flow features with an optimal balance between computational costs and accuracy. Compared to the previous developments, a specific near-wall treatment is added, in order to preserve full-URANS behavior in the first near-wall cells, having in mind typically available mesh resolution in this part of the fluid domain. The updated methodology is applied to the multi-cycle simulation of a reference single-cylinder optical engine, which features a twin-cam, overhead-valve pent-roof cylinder head, and is representative of the current generation of spark-ignited direct-injection thermal power units. Results based on phase-specific flow field statistics and synthetic quality indices demonstrate the consistency and effectiveness of the proposed methodology, which is then qualified as a suitable candidate for affordable scale-resolving analyses of cycle to cycle variability (CCV) phenomena in direct-injection engines.
TI - A wall-adapted zonal URANS/LES methodology for the scale-resolving simulation of engine flows
JF - International Journal of Engine Research
DO - 10.1177/14680874211032379
DA - 2022-10-01
UR - https://www.deepdyve.com/lp/sage/a-wall-adapted-zonal-urans-les-methodology-for-the-scale-resolving-f9rSMTArI4
SP - 1732
EP - 1747
VL - 23
IS - 10
DP - DeepDyve
ER -