Thermal performance of gasoline engine with the use of water ammonia solution: Numerical study.

This study examines numerically the effects of using various volumetric blends water ammonia solution (WAS) and gasoline fuel (GF) on the combustion and engine performance of spark ignition (SI) engines. The Russian simulation software Diesel-RK is used for numerical investigation. Four blends are selected for the study starts with pure gasoline for comparison base line case, followed by 5% WAS, 10% WAS, 15% WAS then ends with 20% WAS. The results obtained showed a slight decrease in the combustion pressure and heat release rate for all WAS blends. The burning combustion temperature is reduced by 1.22%, 1.68%, 2.51%, and 3.47% for the operation with 5% WAS, 10% WAS, 15% WAS and 20% WAS respectively. Considerable increase in knock resistance is achieved with the use of WAS blends. Compared to neat gasoline. The minimum octane number (ONmin) required to prevent knock is dropped by 1.5%, 2.33%, 3.28%, 5.18% for 5% WAS, 10% WAS, 15% WAS and 20% WAS respectively. Significant reduction is observed in the exhaust gas temperature is noticed. The operation with 20% WAS reported higher increase in brake thermal efficiency (BTE) (2.34%) as well as lower decrease in the exhaust gas temperature (5.46%) compared to other blends of WAS. The brake-specific fuel consumption (BSFC) for all blends considered is higher than neat gasoline. The results of other investigations are used to check the ones that were acquired. [ABSTRACT FROM AUTHOR]