Sep 27 2017 03:00 PM
Sep 27 2017 04:00 PM
The Clean Combustion Research Center hosted a seminar on “Combustion modelling in IC engines and engine-like test rigs using Conditional Moment Closure” by Dr. Yuri M. Wright on the 27 Sept, 2017.
Conditional Moment Closure (CMC) is among a variety of methods which have emerged in combustion research that allow for the inclusion of finite rate chemistry in practical calculations of turbulent reactive flows, incorporating also effects of spatial transport and turbulence-chemistry interaction. Dr. Wright summarized a decade of research, development and application of CMC to auto-igniting sprays in various optically accessible test rigs at engine relevant conditions, optically accessible heavy-duty engines as well as full metal engines.
He discussed developments enabling the treatment of multiple injections in the context of post-injections for soot reduction as well as split injections towards PCCI and highlighted the potential of the method to complement and support experimental findings specifically in the context of NOx and soot emissions.
He also presented the application of a newly developed CMC premixed code, using validation data from a Direct Numerical Simulation (DNS) of an expanding turbulent flame at engine relevant temperature and turbulence levels in a confined environment. The seminar concluded with a discussion concerning the challenge with respect to further developing the methodology to address “multi-mode” combustion systems with both premixed and non-premixed energy conversion modes – such as dual-fuel engines.
Dr. Yuri M. Wright is the head of engine computational reactive fluid dynamics group at the Aerothermochemistry and Combustion Systems Laboratory of Prof. Dr. K. Boulouchos in ETH Zürich. He is also a project leader at the ETH spin-off “combustion and flow solutions GmbH” (CFD services company). His research interests are in numerical methods for turbulent reactive single and multi-phase flows in non-premixed, premixed and dual fuel systems; from fundamental, optically accessible rigs to industrially relevant applications and in particular internal combustion engines