Atomization characteristics comparison between diesel and LPG/diesel dual fuel

The comparison was analyzed by using high resolving power digital camera.Resultsshow that with LPG mixed ratio increasing, fuel droplet mean-diameters of the sprays decrease, the curve of fuel droplet size number distribution moves toward smaller diameters, and the small-size droplet number increases, spray quality goes well, and engine smoke reduces accordingly; large-size droplet diameters almost have no change, but small-size droplet diameters decrease, and relative size range and dispersion boundary of droplets increase; with penetrated distance of spray increasing, diesel droplet sizes increase, droplet sizes number distribution of the mixed fuel moves toward smaller diameters, and droplet diameters of cumulate volume increase. Both relative size range and dispersion boundary of fuel droplets have a decrease tendency; the volume distribution of fuel droplets goes to uniform gradually within larger-size range, because penetrated distance is large, spray shot distance always equal to the maximum distance that fuel can touch combustion chamber wall.