|Title||A Sequential Chemical Kinetics-CFD-Chemical Kinetics Methodology to Predict HCCI Combustion and Main Emissions|
|Publication Type||Conference Paper|
|Year of Publication||2012|
|Authors||Iván Dario Bedoya, Francisco J Cadavid, Samveg Saxena, Robert W Dibble, Salvador Aceves, Daniel Flowers|
|Conference Name||SAE 2012 World Congress & Exhibition, April 24, 2012|
|Conference Location||Detroit, Michigan, United States|
This study presents the development of a new HCCI simulation methodology. The proposed method is based on the sequential coupling of CFD analysis prior to autoignition, followed by multi-zone chemical kinetics analysis of the combustion process during the closed valve period. The methodology is divided into three steps: 1) a 1-zone chemical kinetic model (Chemkin Pro) is used to determine either the intake conditions at IVC to achieve a desired ignition timing or the ignition timing corresponding with given IVC conditions, 2) the ignition timing and IVC conditions are used as input parameters in a CFD model (Fluent 6.3) to calculate the charge temperature profile and mass distribution prior to autoignition, and 3) the temperature profile and mass distribution are fed into a multi-zone chemical kinetic model (Chemkin Pro) to determine the main combustion characteristics.