Modeling of Unburned Hydrocarbon Oxidation in Engine Conditions using Modified One-step Reaction Model

2007-01-3536

08/05/2007

Event
Asia Pacific Automotive Engineering Conference
Authors Abstract
Content
Modeling of unburned hydrocarbon oxidation in an SI engine was performed in engine condition using modified one-step oxidation model. The new one-step equation was developed by modifying the Arrhenius reaction rate coefficients of the conventional one-step model. The modified model was well matched with the results of detailed chemical reaction mechanism in terms of 90 % oxidation time of the fuel. In this modification, the effect of pressure and intermediate species in the burnt gas on the oxidation rate investigated and included in developed one-step model. The effect of pressure was also investigated and included as an additional multiplying factor in the reaction equation. To simulate the oxidation process of piston crevice hydrocarbons, a computational mesh was constructed with fine mesh density at the piston crevice region and the number of cell layers in cylinder was controlled according to the motion of piston. The effects of engine operation condition on the oxidation rate was examined at several engine load and speed conditions, and the sensitivity of oxidation rate to the piston crevice volume was also evaluated.
Meta TagsDetails
DOI
https://doi.org/10.4271/2007-01-3536
Pages
11
Citation
Kwon, H., and Min, K., "Modeling of Unburned Hydrocarbon Oxidation in Engine Conditions using Modified One-step Reaction Model," SAE Technical Paper 2007-01-3536, 2007, https://doi.org/10.4271/2007-01-3536.
Additional Details
Publisher
Published
Aug 5, 2007
Product Code
2007-01-3536
Content Type
Technical Paper
Language
English