Experimental Study on the Macro Spray and Combustion Characteristics of Mixed Sunflower Oil and Diesel Fuel

Abstract

In this paper, the use of sunflower seed oil diesel blend fuel on agricultural engine is studied. The alternative fuel varieties used for agricultural diesel engine are explored, and the industrial uses of aging grain are explored. For this purpose, we carried out the basic physical and chemical characteristics test of the blended fuel in our professional laboratory. We also carried out the macro spray characteristics of the fuel. Meanwhile, we also carried out the combustion characteristic test on the agricultural engine ZS195. The test showed that the mixed fuel was better than the pure diesel in the aspect of the penetration distance and the area of the oil beam. The spray cone angle was slightly worse in the middle period, and the later performance was satisfactory. The maximum explosion pressure in the cylinder of the mixed fuel was less than 7% lower than that of the pure diesel, and the peak time lag was 1-2oCA.The instantaneous exothermic rate of the mixed fuel was about 7% higher than that of the pure diesel, and the peak time was 2oCA behind the pure diesel under the high speed and high power condition. The temperature in the cylinder of the mixed fuel was about 2% higher than that of the pure diesel in the middle and late period. Mixed fuel could be used as an alternative fuel for agricultural engines.