Terascale High-Fidelity Simulations of Turbulent Combustion with Detailed Chemistry

Im, Hong G ; Trouve, Arnaud ; Rutland, Christopher J ; Chen, Jacqueline H

University of Maryland at College Park

关键词: Combustion;    33 Advanced Propulsion Systems;    High-Performance Computing;    Pollutant Formation;    Radiative Heat Transfer;   

DOI  :  10.2172/1048137
RP-ID  :  DOE/ER/15227-1 Final Report
RP-ID  :  FG02-01ER15227
RP-ID  :  1048137

美国|英语

来源: UNT Digital Library

【 摘 要 】

The TSTC project is a multi-university collaborative effort to develop a high-fidelity turbulent reacting flow simulation capability utilizing terascale, massively parallel computer technology. The main paradigm of our approach is direct numerical simulation (DNS) featuring highest temporal and spatial accuracy, allowing quantitative observations of the fine-scale physics found in turbulent reacting flows as well as providing a useful tool for development of sub-models needed in device-level simulations. The code named S3D, developed and shared with Chen and coworkers at Sandia National Laboratories, has been enhanced with new numerical algorithms and physical models to provide predictive capabilities for spray dynamics, combustion, and pollutant formation processes in turbulent combustion. Major accomplishments include improved characteristic boundary conditions, fundamental studies of auto-ignition in turbulent stratified reactant mixtures, flame-wall interaction, and turbulent flame extinction by water spray. The overarching scientific issue in our recent investigations is to characterize criticality phenomena (ignition/extinction) in turbulent combustion, thereby developing unified criteria to identify ignition and extinction conditions. The computational development under TSTC has enabled the recent large-scale 3D turbulent combustion simulations conducted at Sandia National Laboratories.