Analysis of Measured Droplet Size Distribution of Air Deflected Diesel Spray

Abstract

The droplet size distribution in diesel spray from a multi-hole nozzle deflected by cross air flow is measured using a laser diffraction technique. The spatial and temporal droplet size distributions are obtained at different transverse air velocities and ambient pressures. The effect of air density, instantaneous injection rate, etc., on droplet size is studied. Results of this investigation indicate that the droplet size is reduced and the size distribution becomes narrower at higher transverse air velocities. Using experimental data, nonlinear correlations are derived for prediction of two-dimensional spatial and temporal variations of droplet size distribution and fuel concentration in a deflected spray.