Combustion Analysis of Various Gaseous Fuels in Spark Ignition Engine Using MATLAB Simulation

Abstract

MATLAB, an extremely potent programming tool that can simulate a variety of scenarios based on the demands and inputs provided, was used for the simulation. The performance of each fuel in a spark ignition engine can be compared when the output of each fuel is evaluated under the same operating conditions, such as equivalency ratio, rpm, compression ratio, and spark timing. This effort is also a tiny step toward computer simulation for determining whether Hydrogen, Syngas, Natural gas can be used as the fuel for spark ignition engines. In this project, hydrogen and other fuels are used to simulate a spark-ignition engine. The purpose of this simulation is to do a thermodynamic analysis of the engine while taking into account various parameters using hydrogen, and to compare the results with those obtained using gasoline, biogas, and hydrogen mixtures, syngas and natural gas. The simulation's results are useful for describing all of the fundamental physical processes taking place in the combustion chamber and for determining engine power and emission under various operating situations. Increasing the CR ratio from 9:1 to 10:1, maximum pressure was increased up to 15% and NOx emission was increased to 10% for each gas. Similarly, other aspect such as Spark ignition showed a change up to 12%-15% increment in pressure and NOx emission when spark timing was increased by 5 degree. Increment in rpm showed an increase of 15%-20% when rpm was increased by 1000. Increment in equivalence ratio by 0.1 increases the pressure by 10%-15% while NOx emission was increased up to 20% for each gas.