Effect of Nozzle Configuration on Characteristics of Steady-State Diesel Spray

There have been many experiments to characterize Diesel fuel spray under steady-state conditions. However, the best number and position of holes on the sac to be used in the experiment are not clear. To address these question, we investigate Diesel type spray flows using a laser Doppler anemometer (LDA) and a phase Doppler anemometer (PDA).

Spray flow characteristics, such as mean and fluctuating two component velocities, the two dimensional distribution of particle diameter and the three parameter variation at the log-hyperbolic fitting according to particle size distribution, are given from measured data.

Spray jets from four varieties of Diesel nozzle are compared with each other to identify the differences in spray characteristics between them. The results show that the spray from the original single-hole nozzle on the top of the sac is distinct from the other types of nozzle.