In this work, 11 regression models based on machine learning techniques were employed to provide a fast-response and accurate model for the prediction of start combustion in homogeneous charge compression ignition engines fueled with methane. These are categorized into linear nonlinear types. Although robust random sample consensus (RANSAC) is type as well SAM (simple algebraic model), accuracy...

Abstract The Homogeneous Charge Compression Ignition (HCCI) concept shows great potential for improving engine efficiency and reducing pollutant emissions. However, the operation with this in Internal Combustion (IC) engines is still limited to low speed load conditions, as excessive Pressure Rise Rates (PRR) are generated its fast auto-ignition. To overcome limitation, use of moderate thermal ...

Chemical kinetic factors of hydrocarbon oxidation are examined in a variety of ignition problems. Ignition is related to the presence of a dominant chain branching reaction mechanism that can drive a chemical system to completion in a very short period of time. Ignitio n in laboratory environments is studied for problems including shock tubes and rapid compression machines. Modeling of the labo...

A detailed chemistry-based CFD model was developed to simulate the diesel spray combustion and emission process. A reaction mechanism of n-heptane is coupled with a reduced NOx mechanism to simulate diesel fuel oxidation and NOx formation. The soot emission process is simulated by a phenomenological soot model that uses a competing formation and oxidation rate formulation. The model is applied ...

The main task of the engine 3D CFD simulation is to support combustion design development. New combustion concepts (e.g. Low Temperature Combustion, HCCI, multiple injection strategies ...) can be analyzed and predicted by detailed thermo-dynamical computation. To achieve this aim many simulation tools are needed: each of them should be capable of reproducing the sensitivities of combustion des...

A numerical model of the micro-free-piston engine was developed and its correctness verified by comparison between simulation referential experiment results under same work conditions. Based on this model, effects water vapor blending ratio (α) combustion thermal performance emission characteristics hydrogen (H2) homogeneous charge compressing ignition (HCCI) were investigated numerically. The ...