HOLOGRAPHY EXPERIMENTS IN A DENSE HIGH-SPEED IMPINGING JET SPRAY

In this article an experimental study of the fluid dynamics of a spray created by two high-speed impinging jets is presented, Utilizing a no vel two-reference-beam double-pulse holographic technique, the effects of the impingement angle, liquid jet velocity, orifice diameter, and liquid properties on the atomization process were investigated, Visual ization of the overall spray pattern and measurements of the size and velocity of the droplets were performed, The overall spray pattern cle arly revealed the inherent wave nature in the disintegration process f or this type of atomization, Smaller droplets were generated more rapi dly, in a shorter distance from the impingement point, with larger imp ingement angles, higher jet velocities, and smaller orifice diameters, Surface tension played an important role in the droplet size without any noticeable effect on the spray pattern, whereas viscosity affected the structure without any significant effect on the droplet size, The droplet velocities were not affected markedly by the liquid propertie s, The superiority of the universal root-normal distribution to the Ro sin-Rammler distribution was proved in the great majority of cases tes ted.