NUMERICAL INVESTIGATION OF DIESEL ENGINE PERFORMANCE OPERATED IN DUAL FUEL PHASE WITH INCREASING SYNGAS DIESEL ADDITION RATIO AND LAMBDA VALUE OF 1

Syngas is one of the most promising alternative fuels that researchers have recently been focusing on in the field of dual fuel technology. Only a Few scientists have attempted to substitute diesel fuel with syngas fuel. As a result, essential knowledge on mixing ratios, combustion characteristics, and pollution from diesel-syngas dual fuel engines remains limited. In this simulation study, Fluent software 16.1 was used to evaluate the emissions as well as the combustion properties of a diesel-syngas mixture at dual fuel mode under different addition ratios of syngas with diesel, 2000 rpm engine speed, and lambda value of 1. The numerical simulations have been conducted on single cylinder diesel engine that operates using the direct injection technique. In addition, an increase was indicated via the results in peak temperature and pressure when syngas fuels were added and directly influenced by H-2 percentage. Based on the results, increasing the fraction of diesel fuel in the mixture limits the increase of Nitric oxide (NO), Carbon dioxide (CO2) and Carbon monoxide (CO) emissions, due to the low flammability of diesel combustion. While rising the syngas percentage in the mixture increases emissions of NO, CO2, and CO. due to the syngas has a fast-burning level, in turn leads to the high combustion temperature for the mixture.