| Popis: |
Extensions to a unified k- turbulence model being used to analyze high-speed aeropropulsive flows are discussed. The model blends the coefficients utilized for free shear flow and wall bounded flows, improving overall agreement with basic data sets. The scalar fluctuation model (SFM) has been upgraded with an improved wall damping function that leads to improved comparisons with high-speed heat transfer data sets. Model calibration and validation has utilized experimental, LES, and DNS data sets and we show comparisons with high-speed shear layer and boundary layer data sets, as well as with several shock/boundary layer interaction data sets. This paper focuses on wall bounded flows with a companion paper presented by Brinckman at this meeting focused on applications of this unified model to fuel/air mixing problems. Recent work with DDES modeling that blends LES with the unified turbulence model is briefly summarized, providing the advantages of accounting for Prt and Sct variations in the RANS regions of the flowfield. |
