The effect of mixed nanoadditive‐blended diesel–water emulsion on the performance, combustion, and emission characteristics of a DI diesel engine

The present paper examines the impact of mixed nanoadditive (Al2O3 and ZnO) incorporated diesel–water emulsion on the combustion, performance, and emission of a single‐cylinder diesel engine under varying load conditions. The test fuels consist of constant fuel ratio of 88% diesel, 10% water, and 2% surfactant. Also, different concentrations of mixed nanoadditives—50 ppm, 100 ppm, and 150 ppm—are added to the test fuel. The ultrasonicator bath is employed for agitation or stirring of test fuels. The test results indicate that the mixed nanoadditives in diesel–water emulsion improve combustion characteristics, brake thermal efficiency, and brake‐specific fuel consumption, whereas the maximum improvement is achieved at full load. It is also determined from the test results that the nanoadditive‐blended test fuel showed a noticeable decrement in CO, NOx, and hydrocarbon emissions as compared with neat diesel. The optimum results are obtained for D88S2W10ZA150 blend. Owing to the higher surface‐to‐volume ratio, enhanced atomization rate, high catalytic behavior, and shortened ignition delay are possible reasons to improve diesel engine working characteristics.