Comparative experimental study on macroscopic spray characteristics of various oxygenated diesel fuels

Under high ambient pressure (5 MPa) and different injection pressures (90, 120, 150 MPa), a high-speed imaging technique was carried out to comparatively investigate the macroscopic spray characteristics of diesel with three types blended fuel in constant volume chamber. The oxygenated fuels were n-butanol (B), pine oil (P), 2,5-dimethylfuran (DMF). All their blending ratio 20%. Results showed that less viscosity could be improved range experimental conditions. Then, tested had longer penetration greater area increasing from 90 MPa. On other hand, percentage increases mean cone angle D100, B20, P20, DMF20 3%, 4.4%, 2.4%, 2.9%, respectively. At same condition, penetrations P20 larger than but B20 basically similar D100. Besides, performance D100 < DMF20. In addition, comprehensive influence would benefit for developing atomization air–fuel mixture conventional fuel.