Development of a Novel Flame Propagation Model (UCFM: Universal Coherent Flamelet Model) for SI Engines and Its Application to Knocking Prediction NISSAN MOTOR CO., LTD

Format:

Conference/Event

Author/Creator:

Teraji, Atsushi, author.

Conference Name:

SAE 2005 World Congress & Exhibition (2005-04-11 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2005

Summary:

Combustion in engines involves very complicated phenomena (including flame propagation and knocking), which are strongly affected by engine speed, load and turbulence intensity in the combustion chamber. The aim of this study was to develop a flame propagation model and a knocking prediction technique applicable to various engine operating conditions, including engine speed and in-cylinder turbulence intensity. A flame propagation model (UCFM) has been developed that improved the Coherent Flamelet Model by considering flame growth both in terms of the turbulent flame kernel and laminar flame kernel. A knocking prediction model was developed by implementing the Livengood-Wu integral as the autoignition model. The combined model allows evaluation of both where and when autoignition occurs in a real shape combustion chamber. A comparison of the measured and calculated time for the occurrence of knocking shows good agreement for various operating conditions. The three-dimensional calculation results indicate the general tendency for the location where autoignition occurs in the combustion chamber and the effect of the spark plug position on the occurrence of knocking

Notes:

Vendor supplied data

Publisher Number:

2005-01-0199

Access Restriction:

Restricted for use by site license