Comparison of two thermodynamic combustion models

4th International Scientific Conference SEA-CONF 2018

Sabau, A.^1

Maritime University of Constanta, 104, Mircea Cel Batran, Constanta

9000663, Romania^1

关键词: Chemical mechanism;    Combustion model;    Combustion pro-cess;    Engine performance;    Function modeling;    Linear cylinder;    Practical method;    Stoichiometric reaction;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/172/1/012033/pdf
DOI  :  10.1088/1755-1315/172/1/012033

来源: IOP

【 摘 要 】

The paper aims at making a comparison between two models of the process of thermodynamic combustion, the fuel rate model and the Wiebe's function model, used for the prediction of the engine performance. The paper shows a practical method that enables a basic calibration of the constants encountered in the mathematical models when there are no concrete experimental data for the specified engines, but there are data for similar engines. The models have opposite starting hypotheses in the frame of the combustion process modelling and there is the advantage of a large number of well documented case studies in the reference literature. Both models use the Annand and Pflaum approximations for the heat release assessment, that have particular relations for the piston, the linear cylinder and the cylinder cover. The chemical mechanism use stoichiometric reactions taking into account the dissociation.