Validation of a zero-dimensional model for prediction of engine performances with FORTRAN and GT-power software

The increasing complexity of modern engines has rendered the prototyping phase long and expensive. this is where engine modelling has become,in the recent years,extremely useful and can be used as an indispensable tool when developing new engine concepts. the purpose of this work was to provide a flexible thermodynamic model based on the filling-and-emptying approach for the performance prediction of a four-stroke turbocharged compression ignition engine and to present in the qualitatively point of review the effect of a number of parameters considered affecting the performance of turbocharged diesel engines. to validate the model,comparisons were made between results from a computer program developed using fortran language and the commercial gt-power software operating under different conditions. the comparisons showed that there was a good concurrence between the developed program and the commercial gt-power software. the range of variation of the rotational speed of the diesel engine chosen extends from 800 to 2100 rpm. by analyzing these parameters with regard to two optimal points in the engine,one relative to maximum power and another to maximum efficiency,it was found that the parameters as stroke-bore ratio and the cylinder wall temperature have a small influence on the brake power and effective efficiency. while the angle of start injection,mass fuel injected,compression ratio have a great influence on the brake power and effective efficiency. © 2015 jordan journal of mechanical and industrial engineering.