  We present an extensive experimental study focused on understanding the
impact of cavitation in a high-pressure diesel nozzle on the macroscopic
properties of fuel spray. Several high-speed videos of the liquid flow through
a transparent, asymmetric cylindrical nozzle with a single orifice (phi = 0.35
mm) are recorded along with the videos of the resulting spray in the
near-nozzle region, issued with an injection pressure of 300 bar at a
frame-rate of 75 kHz. The high-repetition images of the internal flow are then
used to estimate the onset of cavitation inside the transparent nozzle and the
probability of development of cavitation in different regions of the nozzle
with an average estimate of the amount of cavitation with time. On the other
hand, recorded spray images are used to study spray penetration, cone-angles
and velocity from the start of fuel injection. A novel approach is proposed for
the measurement of perturbations that occur in form of big liquid structures
along the spray boundary.
