Soot Source Term Tabulation Strategy for Diesel Engine Simulations with SRM
Paper in proceeding, 2015

In this work a soot source term tabulation strategy for soot predictions under Diesel engine conditions within the zero-dimensional Direct Injection Stochastic Reactor Model (DI-SRM) framework is presented. The DI-SRM accounts for detailed chemistry, in-homogeneities in the combustion chamber and turbulence-chemistry interactions. The existing implementation [1] was extended with a framework facilitating the use of tabulated soot source terms. The implementation allows now for using soot source terms provided by an online chemistry calculation, and for the use of a pre-calculated flamelet soot source term library. Diesel engine calculations were performed using the same detailed kinetic soot model in both configurations. The chemical mechanism for n-heptane used in this work is taken from Zeuch et al. [2] and consists of 121 species and 973 reactions including PAH and thermal NO chemistry. The engine case presented in [1] is used also for this work. The case is a single-injection part-load passenger car Diesel engine with 27 % EGR fueled with regular Diesel fuel. The two different approaches are analyzed and a detailed comparison is presented for the different soot processes globally and in the mixture fraction space. The contribution of the work presented in this paper is that a method which allows for a direct comparison of soot source terms - calculated online or retrieved from a flamelet table - without any change in the simulation setup has been developed within the SRM framework. It is a unique tool for model development. Our analysis supports our previous conclusion [1] that flamelet soot source terms libraries can be used for multi-dimensional modeling of soot formation in Diesel engines.

Author

Andrea Matrisciano

Chalmers, Applied Mechanics, Combustion and Propulsion Systems

Anders Borg

LOGE AB

Cathleen Perlman

LOGE AB

Harry Lehtiniemi

LOGE AB

M. Pasternak

Brandenburg University of Technology

F. Mauss

Brandenburg University of Technology

SAE Technical Papers

0148-7191 (ISSN)

Vol. 2015

12th International Conference on Engines & Vehicles
Neapel, Italy,

Subject Categories

Mechanical Engineering

DOI

10.4271/2015-24-2400

More information

Latest update

7/12/2021