Simulation of a burner with different fuels and analysis based on entropy generation

Abstract The most diverse fuels in different state among the most common are wood, coal, hydrocarbons (methane CH 4 , propane C 3 H 8 , gasoline, gas oil, kerosene, fuel oil ...), hydrogen (H 2 ). The oxidizer is most often oxygen from the air, more exceptionally pure oxygen (rocket engine, some industrial furnaces) which allows reaching higher temperatures but poses safety problems. Combustion is one of the main themes of energy. This paper study a numerical simulation of combusting hydrogen and various hydrocarbons with air in a burner and the numerical solution of the local entropy generation rate due to the high temperature and velocity gradients in the combustion chamber. In this work the calculations showed that the maximum reaction rates reduce with the augment of φ or the reduce of the oxygen percentage. The temperatures gradients take place in the axial direction, however, the raise of φ considerably minimize them also the increase of φ from 0.5 to 1.0 decrease the entropy generation rates.