Abstract
Paper presents results of modelling gas engine thermal cycle using AVL FIRE and KIVA 3V software. There are described three combustion models used in software. KIVA and FIRE software are used in Institute of Internal Combustion Engines and Control Engineering for analysis of thermal cycle of IC engines. FIRE software gives many possibilities with many combustion models. All used combustion models are dependent on turbulence of flow field before ignition. Comparison of modelling results of thermal cycle of IC engine is presented in paper. Pressure, temperature, heat release and turbulence parameters variations in function of crank angle as well as spatial distribution of above mentioned quantities at selected crank angles were determined.
Highlights
The numerical simulations with advanced computer programs gives possibilities to very complicated processes research conduct
The AVL FIRE software belongs to contemporaries programs which are used to modelling of thermal cycle of internal combustion engines
AVL FIRE allows modelling knock process which occurs in combustion chamber of IC engine
Summary
The numerical simulations with advanced computer programs gives possibilities to very complicated processes research conduct. Connection advanced programs with contemporary computers give a chance to modelling turbulent flow and heat processes with combustion, fuel injection, heat transfer, toxic components of exhaust gas and soot. Numerical simulations in additional allow researchers to observe spatial distribution of individual parameters. This make easier to understand a very complicated processes. Mathematical modelling gives possibilities to optimization shape of an intake manifold, an exhaust or a combustion chamber. This method is an essential method in design and optimization. Modelling was carried out using three-dimensional CFD: AVL FIRE and KIVA-3V
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