Study of diesel spray particle velocity field using a particle image velocimetry setup

To study the velocity and its distribution characteristics of the diesel spray particles, a set of the particle image velocimeter (PIV) system as a typical application of the laser sheet technique was developed and used to observe and analyze the spray particle velocity field. The system may be divided into two parts: photographic system, which is used for taking pictures of the spray particles as the double-exposure image, and analysis system, which is used to obtain velocity vector field of the spray particles. The system has been used to measure some characteristics of the spray particle velocity in region of 10-50 mm from the nozzle tip.